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Contents Wiring diagrams Section: Differentials & Drive Axles All sections

Rear Drive Axle Cadillac XLR I

Differentials & Drive Axles 20 illustrations ~7467 words

Fastener Tightening Specifications

ApplicationSpecification
MetricEnglish
Carrier Assembly - Differential-to-Transmission Bolts and Nuts50 N.m37 lb ft
Differential Case Bolts55 N.m41 lb ft
Drain Plug35 N.m26 lb ft
Driveline Support Assembly-to-Engine Flywheel Housing Bolts50 N.m37 lb ft
Electronic Brake and Traction Control Module (EBTCM) LH Mounting Bracket Bolts50 N.m37 lb ft
Fill Plug35 N.m26 lb ft
Left Side Cover Bolts28 N.m20 lb ft
Negative Battery Cable Bolt15 N.m11 lb ft
Pinion Housing/Cage Bolts28 N.m20 lb ft
Pinion Nut500 N.m370 lb ft
Propeller Input Shaft Bearing Positioning Bolts35 N.m26 lb ft
Propeller Shaft Hub Clamp Bolt130 N.m96 lb ft
Rear Cover Bolts and Stud10 N.m89 lb in
Rear Shock Absorber Lower Mounting Bolt220 N.m162 lb ft
Rear Suspension Crossmember Mounting Nuts110 N.m81 lb ft
Right Side Cover Bolts28 N.m20 lb ft
Ring Gear Bolts - 1st Design - No Serrations145 N.m107 lb ft
Ring Gear Bolts - 2nd Design - Serrations195 N.m144 lb ft
Shift Control Closeout Boot Retaining Nuts12 N.m106 lb in
Shift Control Mounting Bolts30 N.m22 lb ft
Transaxle Mount Bracket-to-Differential Bolts50 N.m37 lb ft
Transaxle Mount-to-Bracket Nuts59 N.m43 lb ft
Transaxle Mount-to-Rear Suspension Crossmember Nuts50 N.m37 lb ft
Transmission Oil Cooler Rear Pipe Fitting-to-Junction Fittings at Engine Flywheel Housing27 N.m20 lb ft
Transmission Shift Rod Clamp Bolt30 N.m22 lb ft
Transmission Stud Mount Bolts10 N.m89 lb in
Transmission Stud-to-Mount42 N.m31 lb ft

Fastener Tightening Specifications

Rear Axle Specifications

ApplicationSpecification
MetricEnglish
Differential Case Shim Sizes1.0 mm0.039 in
1.25 mm0.048 in
1.3 mm0.050 in
1.4 mm0.054 in
1.5 mm0.059 in
1.55 mm0.060 in
1.6 mm0.062 in
1.65 mm0.064 in
1.7 mm0.066 in
1.75 mm0.068 in
1.8 mm0.070 in
1.85 mm0.072 in
1.9 mm0.074 in
1.95 mm0.076 in
2.0 mm0.078 in
2.05 mm0.079 in
2.1 mm0.081 in
2.15 mm0.083 in
2.2 mm0.085 in
2.25 mm0.087 in
2.30 mm0.089 in
Pinion Cartridge/Cage Shim Sizes0.2 mm0.007 in
0.25 mm0.009 in
0.3 mm0.011 in
0.5 mm0.019 in
1.0 mm0.039 in
1.30 mm0.050 in
1.35 mm0.052 in
1.40 mm0.054 in
1.45 mm0.056 in
1.50 mm0.058 in
1.55 mm0.060 in
1.60 mm0.062 in
1.65 mm0.064 in
1.70 mm0.066 in
1.75 mm0.068 in
1.80 mm0.070 in
1.85 mm0.072 in
1.90 mm0.074 in
1.95 mm0.076 in
Pinion Rotating Torque1.4-2.8 N.m12-25 lb in
Ring Gear/Pinion A1 Nominal Value - All Axles103.00 mm4.055 in
Ring Gear/Pinion A2 Nominal Value - All Axles74.5 mm2.93 in
Ring Gear/Pinion Backlash0.16-0.26 mm0.0063-0.0102 in

Rear Axle Specifications

Scheme 1

Scheme 1: Rear Axle Usage
Scheme 1: Rear Axle Usage
CalloutComponent Name
1Serial Number
2GM Part Number
GM P/NAxle RatioTransmission
242345962.93 - StandardAutomatic
125854782.56 - XLRVAutomatic

Available Axle Ratios

Spacer and Shim Specifications

CalculationsExample MeasurementsActual Measurements
MetricEnglishMetricEnglish
B Nominal Value5.00 mm0.197 in5.00 mm0.197 in
B1 Measured Value3.44 mm0.135 in
B2 (B Nominal Value Minus B1 = B2)1.56 mm0.061 in
A1 Value (Taken from Ring Gear)103.03 mm4.056 in
A Nominal Value103.00 mm4.055 in103.00 mm4.055 in
B3 (A1 Value Minus A Nominal = B3)0.03 mm0.0012 in
B21.56 mm0.061 in
B30.03 mm0.0012 in
Pinion Shim Size (B2 Plus B3 = Pinion Shim)1.59 mm0.0622 in

Pinion Shim Calculation Table with an A1 Value Greater Than 103.00 mm (4.055 in) All Axle Ratios

CalculationsExample MeasurementsActual Measurements
MetricEnglishMetricEnglish
B Nominal Value5.00 mm0.197 in5.00 mm0.197 in
B1 Measured Value3.44 mm0.135 in
B2 (B Nominal Value Minus B1 = B2)1.56 mm0.061 in
A1 Value (Taken from Ring Gear)102.97 mm4.054 in
A Nominal Value103.00 mm4.055 in103.00 mm4.055 in
B3 (A1 Value Minus A Nominal = B3)0.03 mm0.0011 in
B21.56 mm0.061 in
B30.03 mm0.0011 in
Pinion Shim Size (B2 Plus B3 = Pinion Shim)1.53 mm0.0599 in

Pinion Shim Calculation Table with an A1 Value Less Than 103.00 mm (4.055 in) All Axle Ratios

CalculationsExample MeasurementsActual Measurements
MetricEnglishMetricEnglish
C Nominal Value5.00 mm0.197 in5.00 mm0.197 in
C1 Measured Value1.19 mm0.047 in
C2 (C Nominal Value Minus C1 = C2)3.81 mm0.15 in
A2 Value (Taken from Ring Gear)74.53 mm2.934 in
D Nominal Value74.50 mm2.933 in74.50 mm2.933 in
C3 (A2 Value Minus D Nominal = C3)0.03 mm0.0012 in
C23.81 mm0.15 in
C30.03 mm0.0012 in
Left Side Case Shim (C2 Plus C3 = Left Side Shim)3.84 mm0.1512 in

Differential Case Left Side Shim Calculation Table with an A2 Value Greater Than 74.50 mm (2.933 in) All Axle Ratios

CalculationsExample MeasurementsActual Measurements
MetricEnglishMetricEnglish
C Nominal Value5.00 mm0.197 in5.00 mm0.197 in
C1 Measured Value1.19 mm0.047 in
C2 (C Nominal Value Minus C1 = C2)3.81 mm0.15 in
A2 Value (Taken from Ring Gear)74.47 mm2.932 in
D Nominal Value74.50 mm2.933 in74.50 mm2.933 in
C3 (A2 Value Minus D Nominal = C3)0.03 mm0.0012 in
C23.81 mm0.15 in
C30.03 mm0.0012 in
Left Side Case Shim (C2 Plus C3 = Left Side Shim)3.78 mm0.1498 in

Differential Case Left Side Shim Calculation Table with an A2 Value Less Than 74.50 mm (2.933 in) All Axle Ratios

Lubrication Specifications

ApplicationQuantity
MetricEnglish
Differential Lubricant1.86 liters1.97 quarts
Friction Modifier0.14 liters4.7 ounces

Lubrication Specifications

Sealers, Adhesives, and Lubricants

ApplicationType of MaterialGM Part Numbers
United StatesCanada
Differential FillDifferential Lubricant - Synthetic8902167789021678
Differential FillFriction Modifier1052358992694
Stud Mount BoltsThreadlock1234538210953489
Transmission Mounting Stud - CaseSealant105294210953466

Sealers, Adhesives, and Lubricants

Scheme 2

Scheme 2: Rear Axle Disassembled Views
Scheme 2: Rear Axle Disassembled Views
CalloutComponent Name
1Carrier
2Cover - Left
3Cover - Right
6Output Shaft Oil Seal
6Output Shaft Oil Seal
7Bolt
7Bolt
8Bushing
9O-Ring
9O-Ring
10Dowel
11Vent
14O-Ring
15Magnet
50Oil Trough - Some Models
51Output Shaft - Right
52Output Shaft Gear - Right
100Differential Case Assembly
101Bolt
102Ring Gear
103Shim(s)
103Shim(s)
104Bearing Cup
104Bearing Cup
105Bearing
105Bearing
106Bolt
107Differential Case - Right
108Cross Pin
109Clutch Pack - Right
110C-Clip
110C-Clip
112Side Gears
113Side Gear Washers
114Gear - Left
115C-Clip
115C-Clip
116Intermediate Shaft - Left
117Clutch Pack - Left
118Differential Case - Left

Scheme 3

Scheme 3
Scheme 3
CalloutComponent Name
1Carrier
4Pinion Housing/Cage - with Bearings and Spacer
4Pinion Housing/Cage
5Cover - Rear
7Bolt
16Bolt
17Gasket
18Nut
19Shim
21Bolt
22Transmission Stud - Case
23Adapter
25Drain Plug and Washer
26Fill Plug
27Bearing
28Bearing Cup
29Spacer
30Bearing Cup
31Bearing
119Pinion

Begin the system diagnosis by reviewing Rear Axle Disassembled Views , Rear Drive Axle Description and Operation , and Wheel Drive Shafts Description and Operation . Reviewing the description and operation information will help you determine the correct symptom diagnostic procedure when a condition exists. Reviewing the description and operation information will also help you determine if the condition described by the customer is normal operation. Refer to Symptoms - Rear Drive Axle in order to identify the correct procedure for diagnosing the system and where the procedure is located.

Strategy Based Diagnostics

Review the system operations in order to familiarize yourself with the system functions. Refer to Rear Axle Disassembled Views and Rear Drive Axle Description and Operation and Wheel Drive Shafts Description and Operation in Wheel Drive Shafts. All diagnosis on a vehicle should follow a logical process. Strategy based diagnostics is a uniform approach for repairing all systems. The diagnostic flow may always be used in order to resolve a system condition. The diagnostic flow is the place to start when repairs are necessary. For a detailed explanation, refer to Strategy Based Diagnosis in General Information.

Visual/Physical Inspection

  1. Inspect for aftermarket devices, which could affect the operation of the vehicle. Refer to «Checking Aftermarket Accessories»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__checking-aftermarket-accessories) in Wiring Systems.
  2. Inspect the easily accessible or visible system components for obvious damage or conditions, which could cause the symptom.
  3. Inspect for the correct lubricant level and the proper viscosity.
  4. Verify the exact operating conditions under which the concern exists. Note factors such as vehicle speed, road conditions, ambient temperature, and other specifics.
  5. Compare the driving characteristics or sounds, if applicable, to a known good vehicle and make sure you are not trying to correct a normal condition.

Intermittent

Test the vehicle under the same conditions that the customer reported in order to verify the system is operating properly.

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom

  1. «Diagnostic Starting Point - Vibration Diagnosis and Correction»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vibration-symptoms-diagnosis-and-correction__diagnostic-starting-point-vibration-diagnosis) in Vibration Diagnosis and Correction
  2. «Diagnostic Starting Point - Automatic Transmission»(/cadillac/xlr/i-2003-2009/remont/automatic-trans/#automatic-transmission-5l40-e5l50-e-introduction-1-of-2__diagnostic-starting-point-automatic-transmission) in Automatic Transmission - 5L50-E
  3. «Symptoms - Propeller Shaft»(/cadillac/xlr/i-2003-2009/remont/driveshaft-universal-joints/#propeller-shaft) in Propeller Shaft
  4. «Noisy in Drive»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__noisy-in-drive)
  5. «Noisy When Coasting»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__noisy-when-coasting)
  6. «Intermittent Noise»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__intermittent-noise)
  7. «Constant Noise»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__constant-noise)
  8. «Noisy on Turns»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__noisy-on-turns)
  9. «Rear Axle Lubricant Leak Diagnosis»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__rear-axle-lubricant-leak-diagnosis)

Noisy in Drive

CauseCorrection
IMPORTANT: Inspect for the proper gear oil levels prior to performing system diagnosis. Refer to Rear Axle Lubricant Level Inspection .
Transmission noiseRepair or replace as required. Refer to Symptoms - Automatic Transmission in Automatic Transmission - 5L50-E.
Driveline assembly noiseRepair or replace as required. Refer to Symptoms - Propeller Shaft in Propeller Shaft.
Worn axle shaft constant velocity jointsReplace the constant velocity joints as required.
Worn, loose, or damaged axle mount and/or bracketRepair or replace the axle mount and/or bracket as required.
Bearing noise within the differential assemblyA grinding or roar type noise will increase or decrease relative to the vehicle speed. Inspect for the proper fluid level. Fill as required. If the noise continues, repair or replace the unit as required.
Gear set whine noise within the differential assemblyA whine type noise will increase or decrease relative to the vehicle speed, approximately 31-37 km/h (50-60 mph). Typical causes of a gear set whine type noise may include incorrect backlash and/or pinion depth adjustment or worn or scored gear set teeth. Inspect for the proper fluid level. Fill as required. Repair or replace the unit as required.
IMPORTANT
Inspect for the proper gear oil levels prior to performing system diagnosis. Refer to Rear Axle Lubricant Level Inspection .

Noisy in Drive

Noisy When Coasting

CauseCorrection
IMPORTANT: Inspect for the proper gear oil levels prior to performing system diagnosis. Refer to Rear Axle Lubricant Level Inspection .
Worn axle shaft constant velocity jointsReplace the constant velocity joints as required.
Worn, loose, or damaged axle mount and/or bracketRepair or replace the axle mount and/or bracket as required.
Bearing noise within the differential assemblyA grinding or roar type noise will increase or decrease relative to the vehicle speed. Inspect for the proper fluid level. Fill as required. If the noise continues, repair or replace the unit as required.
Gear set whine noise within the differential assemblyA whine type noise will increase or decrease relative to the vehicle speed, approximately 31-37 km/h (50-60 mph). Typical causes of a gear set whine type noise may include incorrect backlash and/or pinion depth adjustment or worn or scored gear set teeth. Inspect for the proper fluid level. Fill as required. Repair or replace the unit as required.
IMPORTANT
Inspect for the proper gear oil levels prior to performing system diagnosis. Refer to Rear Axle Lubricant Level Inspection .

Noisy When Coasting

Intermittent Noise

CauseCorrection
IMPORTANT: Inspect for the proper gear oil levels prior to performing system diagnosis. Refer to Rear Axle Lubricant Level Inspection .
Worn, loose, or damaged axle mount and/or bracketRepair or replace the axle mount and/or bracket as required.
Incorrect gear oilReplace with the correct gear oil and friction modifier additive. Refer to Sealers, Adhesives, and Lubricants .
IMPORTANT
Inspect for the proper gear oil levels prior to performing system diagnosis. Refer to Rear Axle Lubricant Level Inspection .

Intermittent Noise

Constant Noise

CauseCorrection
DEFINITION: A noise heard in the rear axle during all driving conditions. This noise may increase or decrease in volume based on different driving maneuvers and speeds.
IMPORTANT: Inspect for the proper gear oil levels prior to performing system diagnosis. Refer to Rear Axle Lubricant Level Inspection .
Low gear oil levelsFaulty oil seals or other type leaks may contribute to lower than required fluid levels. Refer to Rear Axle Lubricant Leak Diagnosis . Fill to the proper level with the correct gear oil and friction modifier additive. Refer to Sealers, Adhesives, and Lubricants .
Worn, loose, or damaged axle mount and/or bracketRepair or replace the axle mount and/or bracket, as required.
Bearing noise within the differential assemblyA grinding or roar type noise increases or decreases relative to the vehicle speed. Inspect for the proper fluid level. Fill, as required. If the noise continues, repair or replace the unit, as required.
Gear set whine noise within the differential assemblyA whine type noise increases or decreases relative to the vehicle speed, approximately 80-96 km/h (50-60 mph). Typical causes of a gear set whine type noise may include incorrect backlash and/or pinion depth adjustment or worn or scored gear set teeth. Inspect for the proper fluid level. Fill, as required. Repair or replace the unit, as required.
IMPORTANT
Inspect for the proper gear oil levels prior to performing system diagnosis. Refer to Rear Axle Lubricant Level Inspection .

Constant Noise

Noisy on Turns

CauseCorrection
DEFINITION: A noise is present only when the vehicle turns.
IMPORTANT: Inspect for the proper gear oil levels prior to performing system diagnosis. Refer to Rear Axle Lubricant Level Inspection . Operate the vehicle turning in tight circles in both left and right directions. A chatter type concern may indicate an incorrect type gear oil, lack of the friction modifier additive, or worn friction discs and/or plates.
Worn or loose rear axle mount and/or bracketRepair or replace, as required.
Worn axle shaft constant velocity jointsReplace the constant velocity joints, as required.
Worn wheel bearingsReplace the wheel bearings, as required.
Incorrect gear oilDrain and fill to the proper level with the correct gear oil and friction modifier additive. Adding friction modifier to the existing fluid without draining will not correct this condition. Refer to Sealers, Adhesives, and Lubricants and Rear Axle Lubricant Replacement .
IMPORTANT
Inspect for the proper gear oil levels prior to performing system diagnosis. Refer to Rear Axle Lubricant Level Inspection . Operate the vehicle turning in tight circles in both left and right directions. A chatter type concern may indicate an incorrect type gear oil, lack of the friction modifier additive, or worn friction discs and/or plates.

Noisy on Turns

Rear Axle Lubricant Leak Diagnosis

CauseCorrection
IMPORTANT: Upon completion of all repairs, refill the axle with the proper amounts of axle lubricant and friction modifier additive. Refer to Sealers, Adhesives, and Lubricants and Lubrication Specifications .
Restricted or damaged vent valve assemblyReplace the vent valve.
Worn, scored, or missing drain and/or fill plug sealing washersInstall new sealing washers and tighten the plugs per specifications.
Rear cover gasketReplace the rear cover gasket.
Left or right side cover O-ring sealReplace the side cover O-ring seal as required.
Worn or damaged axle shaft oil sealsReplace the axle shaft oil seals as required.
Worn or damaged transaxle O-ringReplace the O-ring and oil seal as required.
Housing or side cover porosityReplace the housing and/or the covers as required.
IMPORTANT
Upon completion of all repairs, refill the axle with the proper amounts of axle lubricant and friction modifier additive. Refer to Sealers, Adhesives, and Lubricants and Lubrication Specifications .

Rear Axle Lubricant Leak Diagnosis

Draining Procedure

  1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/xlr/i-2003-2009/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
  2. Clean any dirt from around the differential drain plug.
  3. Remove the drain plug and washer from the differential.
  4. Drain the fluid.

Filling Procedure

  1. Install the drain plug and washer to the differential. Tighten: Tighten the differential drain plug to 35 N.m (26 lb ft).
  2. Clean any dirt from around the differential fill plug.
  3. Remove the fill plug and washer from the differential.
  4. Fill the differential with fluid: Except V series: Fill with synthetic axle lubricant GM P/N 12378261 (Canadian P/N 10953455). Add approximately 118 ml (4.0 oz) limited-slip differential lubricant additive GM P/N 1052358 (Canadian P/N 992694). V Series: Fill with 1.8 L (1.95 qt) synthetic axle lubricant GM P/N 12378261 (Canadian P/N 10953455). Add approximately 50 ml (5.0 oz) limited-slip differential lubricant additive GM P/N 1052358 (Canadian P/N 992694).
  5. Check the fluid level to ensure it is even with the bottom of the fill plug hole to no lower than 6 mm (0.25 in) below the opening.
  6. Install the fill plug and washer to the differential. Tighten: Tighten the differential fill plug to 35 N.m (26 lb ft).
  7. Lower the vehicle.

Tools Required

J 42055 Transmission Support Fixture

Removal Procedure

  1. Disconnect the negative battery cable.
  2. Raise and suitably support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/xlr/i-2003-2009/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
  3. Remove the rear tire and wheel assemblies. Refer to «Tire and Wheel Removal and Installation»(/cadillac/xlr/i-2003-2009/remont/wheel-tire-system/#tires-and-wheels) .
  4. Remove the rear shock absorber lower mounting bolts.
  5. Remove the 2 transaxle mount to rear crossmember nuts.
  6. Assemble the J 42055 .
  7. Install the J 42055 to a transmission jack.
  8. Position and firmly secure the J 42055 with the transmission jack to the transmission.
  9. Position a transmission jack under the rear suspension crossmember and firmly secure the crossmember to the jack.
  10. Using ONLY HAND TOOLS, remove the rear suspension crossmember retaining nuts.
  11. Carefully lower the rear crossmember approximately 37 mm (1.5 in).
  12. Remove the 2 transaxle mount to differential bolts for the appropriate mount that will be replaced.
  13. Remove the appropriate transaxle mount from the vehicle.

Installation Procedure

  1. Install the transaxle mount to the vehicle.
  2. Install the transaxle mount to differential bolts. Tighten: Tighten the transaxle mount bracket to differential bolts to 50 N.m (37 lb ft).
  3. SLOWLY raise the rear suspension crossmember (still firmly attached to a transmission jack), to the vehicle frame rails. Guide the transaxle mount studs into the slots in the rear crossmember.
  4. Using ONLY HAND TOOLS, install NEW rear suspension crossmember mounting nuts. Tighten: Tighten the rear suspension crossmember mounting nuts to 110 N.m (81 lb ft).
  5. Remove the transmission jack from the rear suspension crossmember.
  6. Release the J 42055 from the transmission, then remove the J 42055 and transmission jack.
  7. Install the 4 transaxle mount to rear suspension crossmember nuts. Tighten: Tighten the transaxle mount to rear suspension crossmember nuts to 50 N.m (37 lb ft).
  8. Install the rear shock absorber lower mounting bolts. Tighten: Tighten the rear shock absorber lower mounting bolts to 220 N.m (162 lb ft).
  9. Install the rear tire and wheel assemblies. Refer to «Tire and Wheel Removal and Installation»(/cadillac/xlr/i-2003-2009/remont/wheel-tire-system/#tires-and-wheels) .
  10. Lower the vehicle.
  11. Connect the negative battery cable. Tighten: Tighten the negative battery cable bolt to 15 N.m (11 lb ft).
  12. Program the transmitters. Refer to «Transmitter Programming (Domestic and Japan)»(/cadillac/xlr/i-2003-2009/remont/door-locks-anti-theft-systems/#keyless-entry-system__transmitter-programming-domestic-and-japan) or «Transmitter Programming (Export - Including Canada)»(/cadillac/xlr/i-2003-2009/remont/door-locks-anti-theft-systems/#keyless-entry-system__transmitter-programming-export-including-canada) .

J 46405 Output Shaft Seal Installer. See Special Tools .

  1. Raise and suitably support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/xlr/i-2003-2009/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
  2. Remove the LH rear tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/cadillac/xlr/i-2003-2009/remont/wheel-tire-system/#tires-and-wheels) .
  3. Remove the LH wheel drive shaft. Refer to «Wheel Drive Shaft Replacement»(/cadillac/xlr/i-2003-2009/remont/axle-shafts/#wheel-drive-shafts__wheel-drive-shaft-replacement) .
  4. Remove the LH muffler assembly. Refer to «Exhaust Muffler Replacement - Left Side»(/cadillac/xlr/i-2003-2009/remont/exhaust/#engine-exhaust-system) .
  5. Drain the fluid from the differential. Refer to «Rear Axle Lubricant Replacement»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle) .
  6. Support the differential and remove the left differential mount.
  7. Clean any dirt or debris from around the differential cover.
  8. Remove the bolts (2) retaining the differential cover (3) and push out the dowel pin.
  9. Remove the differential cover from the differential.
  10. Remove and discard the O-ring seal (4) and the axle seal (1) from the differential side cover.
  1. Clean the O-ring sealing surface on the differential cover and the differential housing.
  2. Install a new O-ring seal (4) to the differential cover (3).
  3. Install the differential cover to the differential.
  4. Install the dowel pin and the differential cover retaining bolts (2). Tighten: Tighten the differential cover bolts to 28 N.m (20 lb ft).
  5. Tighten the bolt retaining the left differential mount. Tighten: Tighten the differential mount bolt to 50 N.m (37 lb ft).
  6. Install the axle seal into the differential cover using J 46405 . See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  7. Fill the differential with the proper fluids and to the proper level. Refer to «Rear Axle Lubricant Replacement»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle) .
  8. Install the LH muffler assembly. Refer to «Exhaust Muffler Replacement - Left Side»(/cadillac/xlr/i-2003-2009/remont/exhaust/#engine-exhaust-system) .
  9. Install the LH wheel drive shaft. Refer to «Wheel Drive Shaft Replacement»(/cadillac/xlr/i-2003-2009/remont/axle-shafts/#wheel-drive-shafts__wheel-drive-shaft-replacement) .
  10. Install the LH rear tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/cadillac/xlr/i-2003-2009/remont/wheel-tire-system/#tires-and-wheels) .
  11. Lower the vehicle.

Differential Carrier Cover and Seal Replacement - Right Side

Tools Required

  1. DT-47596 Bearing Cup Remover. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  2. J 42168-16 Spacers
  3. J 42170 Bearing and Race Installer. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  4. J 45124 Removal Bridge. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  5. J 46405 Output Shaft Seal Installer. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  1. Remove the right rear wheel drive shaft. Refer to «Wheel Drive Shaft Replacement»(/cadillac/xlr/i-2003-2009/remont/axle-shafts/#wheel-drive-shafts__wheel-drive-shaft-replacement) .
  2. Remove the right rear muffler assembly. Refer to «Exhaust Muffler Replacement - Right Side»(/cadillac/xlr/i-2003-2009/remont/exhaust/#engine-exhaust-system) .
  3. Drain the differential fluid. Refer to «Rear Axle Lubricant Replacement»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle) .
  4. Support the differential assembly.
  5. Remove the right differential mount.
  6. Remove the retaining bolts and push out the dowel pin.
  7. Remove the differential cover.
  8. Remove and discard the axle seal (1,4).
  9. Install the DT-47596 (2) into the right cover. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) . Tighten securely into the bearing cup.
  10. Place the J 45124 (1) over the DT-47596 (2). See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) . adjust the legs for the best fit. Install the supplied bolt, nut thrust and washer. Hold the bolt and tighten the nut to remove the bearing cup and shim.
  11. Mark or tag the shim for assembly.
  12. Use a vernier caliper (2), a straight edge (1), and J 42168-16 (3) in order to measure the NEW differential cover bore dimension. Record the measurement as value A.
  13. Use a vernier caliper (2), a straight edge (1), and J 42168-16 (3) in order to measure the old differential cover bore dimension. Record the measurement as value B.
  14. Subtract value B from value A. If the computation is a positive value, add shims equal to the value, to the existing shim pack. If the computations a negative value, subtract shims equal to the value, from the existing shim pack.
  1. Install the selected shims (2) and the bearing race (1) to the New cover.
  2. Press the shims and bearing race into the New cover using the J 42170 and a hydraulic press. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  3. Clean the O-ring sealing surface on the differential cover and the differential housing.
  4. Install a NEW O-ring (4) to the differential cover (3).
  5. Install the differential cover.
  6. Install the dowel pin and the differential cover retaining bolts. Tighten: Tighten the retaining bolts to 28 N.m (20 lb ft).
  7. Install the axle seal into the differential cover using J 46405 . See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  8. Fill the rear axle differential with the proper fluid and level. Refer to «Rear Axle Lubricant Replacement»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle) .
  9. Install the right rear muffler. Refer to «Exhaust Muffler Replacement - Right Side»(/cadillac/xlr/i-2003-2009/remont/exhaust/#engine-exhaust-system) .
  10. Install the right rear wheel drive shaft. Refer to «Wheel Drive Shaft Replacement»(/cadillac/xlr/i-2003-2009/remont/axle-shafts/#wheel-drive-shafts__wheel-drive-shaft-replacement) .

J 46405 Output Shaft Seal Installer. See Special Tools .

  1. Raise and suitably support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/xlr/i-2003-2009/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
  2. Remove the appropriate rear tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/cadillac/xlr/i-2003-2009/remont/wheel-tire-system/#tires-and-wheels) .
  3. Remove the appropriate drive shaft. Refer to «Wheel Drive Shaft Replacement»(/cadillac/xlr/i-2003-2009/remont/axle-shafts/#wheel-drive-shafts__wheel-drive-shaft-replacement) .
  4. Remove the differential output shaft seal.
  1. Using the J 46405 , install the differential output shaft seal. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  2. Install the drive shaft. Refer to «Wheel Drive Shaft Replacement»(/cadillac/xlr/i-2003-2009/remont/axle-shafts/#wheel-drive-shafts__wheel-drive-shaft-replacement) .
  3. Install the rear tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/cadillac/xlr/i-2003-2009/remont/wheel-tire-system/#tires-and-wheels) .
  4. Lower the vehicle.

J 42055 Drivetrain Support Fixture

  1. Disconnect the negative battery cable.
  2. Raise and suitably support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/xlr/i-2003-2009/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
  3. Remove the rear tire and wheel assemblies. Refer to «Tire and Wheel Removal and Installation»(/cadillac/xlr/i-2003-2009/remont/wheel-tire-system/#tires-and-wheels) .
  4. Remove the bolts (1) securing the brake hydraulic line and hose bracket to the suspension crossmember.
  5. Remove the bolts (1) securing the rear brake calipers (2) to the rear knuckles.
  6. Slide the caliper forward, away from the knuckle and rotor.
  7. Disconnect the wheel speed sensor electrical wire harness from the wheel speed sensor.
  8. Disconnect the retainers (1) securing the wheel speed sensor harness to the park brake cables.
  9. Remove the wheel speed sensor harness from the suspension crossmember. Each harness is secured in three places (1).
  10. Route the sensor harnesses away from the suspension crossmember.
  11. Disconnect the park brake cables from the actuator levers.
  12. Pull the park brake cable housing out of the park brake cable brackets attached to the knuckle.
  13. Remove the push pins retaining the right (1) and left (2) park brake cables to the suspension crossmember.
  14. Route the park brake cables away from the suspension crossmember.
  15. Remove the rear suspension position sensors if equipped. Refer to «Electronic Suspension Rear Position Sensor Replacement»(/cadillac/xlr/i-2003-2009/remont/electronic-suspension/#suspension-control-system-suspension-damping) .
  16. Position an adjustable tall jack stand under the lower control arm near the ball joint location.
  17. Raise the jack stand to reduce the transverse spring load on the lower control arm.
  18. Remove the nut from the upper ball joint stud.
  19. Separate the upper ball joint stud from the suspension knuckle. Refer to «Rear Axle Upper Control Arm Replacement»(/cadillac/xlr/i-2003-2009/remont/suspension-rear/#rear-suspension-system) .
  20. Remove the lower shock absorber bolt and nut.
  21. Lower the tall jack stand supporting the lower control arm.
  22. Position the knuckle away from the upper control arm.
  23. Disconnect the inner axle joints (1) from the differential.
  24. Position the knuckle away from the upper control arm.
  25. Position a tall jack stand under the front cradle to support the weight of the front of the vehicle on the hoist.
  26. Position a tall jack stand under the front of the transmission.
  27. Position a transmission jack under the suspension crossmember.
  28. Route a safety strap over the suspension crossmember, but under the brake pipe to secure the rear suspension crossmember to the transmission jack.
  29. Using HAND TOOLS ONLY, remove the lower nuts (2) securing the rear mounts to the crossmember.
  30. Using HAND TOOLS ONLY, Remove the nuts (1) from the rear crossmember bolts.
  31. Lower the rear crossmember approximately 35mm.
  32. Disconnect the plastic brake pipe retainers (2) from the crossmember.
  33. Lower the rear suspension crossmember from the vehicle. This assembly includes the suspension crossmember, lower control arms, transverse leaf spring, rear stabilizer bar and links, knuckles, outer and inner tie rod ends, rotors, hubs, and drive axle assemblies.
  34. Disconnect the vacuum lines from the rear muffler valves, if equipped.
  35. Disconnect the muffler/tailpipe assemblies from the rubber isolators (3) at the rear of the mufflers.
  36. Remove the intermediate pipe. Refer to «Intermediate Pipe Replacement»(/cadillac/xlr/i-2003-2009/remont/exhaust/#engine-exhaust-system) .
  37. Remove the left muffler/tailpipe assembly (1).
  38. Using the hoist, raise the vehicle approximately 50 mm (2 in).
  39. Remove the right muffler/tailpipe assembly (2).
  40. Disconnect the vehicle speed sensor (VSS) connector (1) from the top of the differential.
  41. Disconnect the VSS wiring harness retainers from the differential studs at the top of the differential.
  42. Remove the nuts (1) securing the rear mounts to the differential.
  43. Remove the mounts (2) from the differential.
  44. Reposition the hydraulic brake line forward and away from the differential.
  45. Assemble the J 42055 .
  46. Install the J 42055 to a transmission jack.
  47. Position and firmly secure the J 42055 with the transmission jack to the differential.
  48. Remove the fasteners securing the differential to the transmission.
  49. Using the transmission jack, carefully slide the differential rearward from the transmission.
  50. After the differential has cleared the output shaft of the transmission, the differential can be lowered using the transmission jack.
  1. SLOWLY slide the differential to the transmission.
  2. Install the differential to transmission bolts and nuts. Tighten: Tighten the bolts and nuts to 50 N.m (37 lb ft).
  3. Remove the J 42055 from the differential.
  4. Position the hydraulic brake line rearward to the original position below the differential.
  5. Install the mounts (2) to the differential.
  6. Install the nuts (1) securing the rear mounts to the differential. Tighten: Tighten the nuts to 50 N.m (37 lb ft).
  7. Install the vehicle speed sensor (VSS) electrical wiring harness retainers to the differential studs at the top of the differential.
  8. Connect the VSS connector (1) to the top of the differential.
  9. Install the intermediate pipe. Refer to «Intermediate Pipe Replacement»(/cadillac/xlr/i-2003-2009/remont/exhaust/#engine-exhaust-system) .
  10. Install the right (2) muffler/tailpipe assembly.
  11. Install the left (1) muffler/tailpipe assembly.
  12. Connect the muffler/tailpipe rubber isolators (3) to the rear of the mufflers.
  13. Connect the vacuum lines to the rear muffler valves, if equipped.
  14. Raise the rear crossmember assembly to the vehicle.
  15. Connect the plastic brake pipe retainers (2) to the suspension crossmember.
  16. Finish raising the crossmember.
  17. Using HAND TOOLS ONLY, install NEW rear suspension crossmember mounting nuts (1). Tighten: Tighten the nuts to 110 N.m (81 lb ft).
  18. Using HAND TOOLS ONLY, Install the nuts (2) securing the rear mounts to the suspension crossmember. Tighten: Tighten the lower differential mount nuts to 50 N.m (37 lb ft).
  19. Connect the inner axle joints (1) to the differential.
  20. Position an adjustable tall jack stand under the lower control arm near the ball joint location.
  21. Raise the jack stand to reduce the transverse spring load on the lower control arm.
  22. Connect the upper ball joint to the suspension knuckle. Refer to «Rear Axle Upper Control Arm Replacement»(/cadillac/xlr/i-2003-2009/remont/suspension-rear/#rear-suspension-system) .
  23. Install the shock absorber lower mounting bolt and nut. Refer to «Shock Absorber Replacement (W/F55)»(/cadillac/xlr/i-2003-2009/remont/suspension-rear/#rear-suspension-system) .
  24. Remove the tall jack stand supporting the lower control arm.
  25. Install the rear suspension position sensors if equipped. Refer to «Electronic Suspension Rear Position Sensor Replacement»(/cadillac/xlr/i-2003-2009/remont/electronic-suspension/#suspension-control-system-suspension-damping) .
  26. Install the park brake cables to the suspension crossmember.
  27. Install the push pins retaining the right (1) and left (2) park brake cables to the suspension crossmember.
  28. Install the park brake cable housing to the park brake cable brackets attached to the knuckle.
  29. Connect the park brake cables to the actuator levers.
  30. Install the wheel speed sensor harnesses to the suspension crossmember.
  31. Install the wheel speed sensor harness to the suspension crossmember. Each harness is secured in three places (1).
  32. Connect the retainers (1) securing the wheel speed sensor harness to the park brake cables.
  33. Connect the wheel speed sensor harness connectors.
  34. Remove the bolts (1) securing the rear brake calipers (2) to the rear knuckles.
  35. Remove the bolts (1) securing the brake hydraulic line and hose bracket to the suspension crossmember.
  36. Install the rear tire and wheel assemblies. Refer to «Tire and Wheel Removal and Installation»(/cadillac/xlr/i-2003-2009/remont/wheel-tire-system/#tires-and-wheels) .
  37. Lower the vehicle.
  38. Connect the negative battery cable. Tighten: Tighten the negative battery cable bolt to 15 N.m (11 lb ft).
  39. Program the transmitters. Refer to «Transmitter Programming (Domestic and Japan)»(/cadillac/xlr/i-2003-2009/remont/door-locks-anti-theft-systems/#keyless-entry-system__transmitter-programming-domestic-and-japan) or «Transmitter Programming (Export - Including Canada)»(/cadillac/xlr/i-2003-2009/remont/door-locks-anti-theft-systems/#keyless-entry-system__transmitter-programming-export-including-canada) .

Inspection Procedure

  1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/xlr/i-2003-2009/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
  2. Clean any dirt from around the differential fill plug.
  3. Remove the fill plug and washer from the differential.
  4. Check the differential fluid level. It should be even with the bottom of the fill plug hole to no lower than 6 mm (0.25 in) below the opening.
  5. Add new fluid if necessary. Fill with synthetic axle lubricant GM P/N 1237826 (Canadian P/N 10953455). For the proper synthetic axle lubricant to limited-slip additive ratio, perform the following: For quart containers of lubricant GM P/N 1237826, mix in 2.4 ounces of limited-slip additive GM P/N 1052358. For liter containers of lubricant Canadian P/N 10953455, mix in 75 milliliters of limited-slip additive Canadian P/N 992694. This will maintain a proper synthetic axle lubricant to limited-slip additive mixture.
  6. Install the fill plug and washer to the differential. Tighten: Tighten the differential fill plug to 35 N.m (26 lb ft).
  7. Lower the vehicle.

Rear Axle Disassemble

Tools Required

  1. DT-47596 Bearing Cup Remover. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  2. J 25070 Heat Gun - 500-750F
  3. J 42155 Getrag Axle Differential Housing Lifting Tool. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  4. J-42173-A Differential Holding Fixture. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  5. J 45124 Removal Bridge. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  1. Remove the drain plug and washer (25) and allow the fluid to drain.
  2. Remove the fill plug and washer (26).
  3. Remove the left cover (2) and bolts (7).
  4. Remove the O-ring (9) and oil seal (6) from the cover and discard. Inspect the dowel (10).
  5. Remove the magnet (15) and oil trough (50) from the carrier.
  6. Install the differential carrier (1) onto the J-42173-A (2). See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  7. Install 4 M8 x 1.25 bolts (3). Tighten: Tighten the bolts to 28 N.m (20 lb ft).
  8. Remove the right cover (3) and bolts (7) from the differential.
  9. Remove the O-ring (9) and oil seal (6) from the cover and discard.
  10. Remove the cover - rear (5), bolts (16), and gasket (17).
  11. Install 2 M10 x 1.5 nuts onto the transmission stud (22), if required. Remove the stud from the differential.
  12. Remove the bolts (21) and adapter (23) from the differential. Note and mark the position and direction of the adapter.
  13. Remove the C-clip (115) from the output shaft.
  14. Install the J 42155 into the groove of the output shaft in order to remove the differential case assembly. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  15. Remove the pinion housing/cage bolts (7).
  16. Using the J 25070 , heat the differential housing around the pinion cartridge. Heating the housing will ease in pinion removal.
  17. Remove the pinion cartridge/cage assembly (4) and shim (19) from the differential housing. Mark or tag the shim for assembly. Locate 2 screwdrivers or pry bars to the flange area of the pinion housing/cage to ease in removal.
  18. Install the DT-47596 (2) into the right cover. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) . Tighten securely into the bearing cup.
  19. Place the J 45124 (1) over the DT-47596 (2). See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) . Adjust the legs for best fit. Install supplied bolt, nut, thrust bearing and washer. Hold the bolt and tighten the nut to remove the bearing cup and shim.
  20. Remove the bearing cup (104) and shim (103). Mark or tag the shim for assembly.
  21. Install the DT-47596 (2) into the differential housing, behind the left bearing cup. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) . Tighten securely into the bearing cup.
  22. Place J 45124 (1) over DT-47596 (2). See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) . Adjust the legs for best fit. Install supplied bolt, nut, thrust bearing and washer. Hold the bolt and tighten the nut to remove the bearing cup and shim.
  23. Remove the cup (104) and shim (103) from the differential housing. Mark or tag the shims for assembly.

Ring Gear and Differential Housing Disassemble

Tools Required

  1. J-42159-A Differential Side Bearing Remover. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  2. J 42162 Getrag Axle Side Gear Compressor. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  3. J-42173-A Differential Holding Fixture. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  1. Position the differential case assembly onto the J-42173-A . See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  2. Remove the ring gear bolts and ring gear.
  3. Using a punch and a hammer, drive out the ring gear.
  4. Discard the ring gear bolts.
  5. Install the J-42159-A (2) onto the right differential side bearing. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  6. Using the J-42159-A (2), J 42162 (1), and a hydraulic press, remove the right side bearing from the differential. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  7. Remove the differential case bolts.
  8. Separate the case halves, right and left.
  9. Remove the intermediate shaft and left gear from the left case.
  10. Remove the left clutch pack from the left case. Remove the separator plates (1). Remove the friction discs (2). Remove the friction disc (thick) (3). Remove the bellville washer (4).
  11. Tag the clutch pack to indicate the position of the components.
  12. Install the J-42159-A (2) onto the left differential side bearing. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  13. Using the J-42159-A (2), J 42162 (1), and a hydraulic press, remove the left side bearing from the differential. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  14. Remove the C-clip from the left intermediate shaft.
  15. Remove the gear from the left intermediate shaft.
  16. Using the J 42162 and a hydraulic press, compress the bellville washer and clutch pack in order to remove the cross pin from the right differential case. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  17. Remove the right side gears (1), side gear washers (2), and output shaft and gear (3) from the right differential case.
  18. Remove the right clutch pack from the right case. Remove the bellville washer (1). Remove the friction disc (thick) (2). Remove the friction discs (3). Remove the separator plates (4).
  19. Tag the clutch pack to indicate the position of the components.

Drive Pinion Disassemble

Tools Required

  1. DT-48005 Pinion Bearing Remover. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  2. J 42162 Getrag Axle Side Gear Compressor. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  3. J 42164 Getrag Axle Pinion Gear Holder. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  4. J 42166 Getrag Axle Front Pinion Bearing Remover. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  5. J 42172 Getrag Axle Bearing Race Installer. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  1. Remove the pinion nut using the J 42172 and the J 42164 in a vise. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  2. Position the pinion housing/cage into a press.
  3. Use the J 42162 and a hydraulic press in order to remove the pinion shaft and bearing from the housing/cage. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  4. Remove the nut (1), bearing (2), spacer (3), and pinion shaft (5) from the housing/cage (4).
  5. Install the DT-48005 or J 42166 (2) onto the pinion shaft and bearing. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  6. Use the J 42162 (1), DT-48005 or J 42166 (2), and a hydraulic press in order to remove the bearing from the shaft. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .

Differential Case

  1. Clean the differential case components in solvent.
  2. Inspect the components for the following conditions: Cracks or other damage Damage to threaded bolt holes Unusual wear, scoring, or grooves in the clutch pack area Scored or damaged case side bearing mounting flanges

Gears and Shafts

  1. Clean the gears and shafts with solvent.
  2. Inspect the gears for the following conditions: Chips or cracks Pitting Heat discoloration Unusual wear Excessive wear or scoring in the side gear (1) pin bores Wear, grooves, or scoring on the side gear pin Scored or worn side gear washers (2) Unusual wear or grooves on the output gear (3) splines Damaged to the ring gear threaded bolt holes Damage to the ring gear vehicle speed sensor reluctor ring lobes
  3. Inspect the shafts for the following conditions: Unusual wear Grooved, worn, or damaged splines Damaged C-clip grooves

Clutch Discs and Plates

  1. Clean the discs and plates with solvent.
  2. Inspect the discs and plates for the following conditions: Unusual wear, scoring, or grooves on the separator plate friction surfaces (1) Friction plates with uneven wear or worn friction material (2 and 3) If any one plate or disk in either the left or right pack show signs of wear or scoring, replace the complete pack on both sides. Bent or warped plates or discs Lay the plates and discs on a flat surface and inspect for warpage A worn, scored, or collapsed bellville washer (4)

Bearings and Races

  1. Inspect the bearing rollers and cups for the following conditions: Pitting Scoring or grooves Excessive wear or other damage
  2. Inspect the bearing rollers and cups for heat discoloration. Heat discoloration ranges from a faint yellow to a dark blue color. This discoloration may result from an overload or improper lubrication. Excessive heat causes softening of the rollers and cups. Bearings or cups with sign of heat discoloration must be replaced.
  3. Inspect for bent bearing cages.
  4. Inspect for damaged bearing cages.

Differential Carrier

  1. Clean the differential carrier in solvent.
  2. Inspect for the following conditions: Damage to threaded bolt holes (1) Broken flanges (2) Restrictions within the internal oil passages Damaged case or cover sealing surfaces Damage to the O-ring seal grooves (3) Porosity

Differential Carrier Covers

  1. Clean the covers in solvent.
  2. Inspect the left side cover output shaft bushing (3) for damage or excessive wear.
  3. Inspect the covers for the following conditions: Damage to the O-ring seal surface (1) Damage to the axle shaft oil seal bores (2) Restrictions within the internal oil passages Porosity Dents or damage to the exterior of the rear cover that may create interference with the pinion shaft

Drive Pinion Cleaning and Inspection

  1. Clean the pinion components in solvent.
  2. Inspect for the following conditions: Damage to the nut threads or locking area (1) Worn or scored bearings (2) The pinion housing/cage (4) for damaged bolt holes, broken flanges, restrictions within the oil passages, worn or loose bearing cup and/or cup bores The pinion shaft (5) for damaged threads, worn splines, or worn or scored gear teeth

Drive Pinion Shim Selection

Tools Required

  1. J 42168-1 Shim Measuring Tool. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  2. J 42168-2 Shim Measuring Tool. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  3. J 42168-9 Shim Measuring Tool. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  4. J 42168-11 Shim Measuring Tool. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  5. J-42173-A Differential Holding Fixture. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  1. Install the differential carrier (1) onto the J-42173-A (2). See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  2. Install 4 M8 x 1.25 bolts (3). Tighten: Tighten the bolts to 28 N.m (20 lb ft).
  3. Install the J 42168-1 into the left bearing race bore of the differential housing. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  4. Install the J 42168-9 (1) and thumbscrew to the J 42168-1 (2). See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) . Tighten the thumbscrew until snug.
  5. Install the J 42168-11 (2), bearings (3 and 6), spacer (5), J 42168-2 (7), and bolt (1) to the pinion housing/cage (4). See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) . Tighten the bolt until snug.
  6. Install the pinion housing/cage assembly (4) into the differential housing. The use of M8 x 1.25 dowels or long bolts will ease in pinion housing installation and alignment.
  7. Install the pinion housing/cage bolts (1). Tighten: Tighten the bolts to 28 N.m (20 lb ft).
  8. Using a feeler gage, measure the distance between the J 42168-2 (2) and the J 42168-1 (1). See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) . Record the dimension as B1.
  9. Subtract the B1 value from a B nominal value of 5 mm (0.197 in). Record that calculation as B2. Refer to the applicable calculation tables in «Spacer and Shim Specifications»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__spacer-and-shim-specifications) .
  10. Locate the A1 value (1) on the side of the ring gear.
  11. Subtract the A nominal value of 103.00 mm (4.055 in) from the A1 value. Record the calculation as B3.
  12. Add the B2 value to the B3 value for the proper pinion housing shim thickness. The B3 value may be a positive, negative, or zero value.
  13. Select shims equal to the calculated value. It may be necessary to round the shim or shims total to obtain the proper size shim pack. If the shim thickness calculation is past the midpoint value, round the number higher to the next decimal value. Refer to «Rear Axle Specifications»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__rear-axle-specifications) .

Ring Gear and Differential Housing Assemble

Tools Required

  1. J 42162 Getrag Axle Side Gear Compressor. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  2. J 42170 Getrag Axle Bearing Race Installer. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  1. Install the right clutch pack to the right case. Install the separator plates (4). Install the friction discs (3). Install the friction disc (thick) (2). Install the bellville washer (1).
  2. Install the right output shaft and gear (3), side gears (1), and washers (2) to the right differential case.
  3. Using the J 42162 and a hydraulic press, compress the bellville washer and clutch pack in order to install the cross pin to the right differential case. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  4. Using an M8 bolt for alignment, properly position the cross pin into the right differential case. The hole in the pin (2) must align with the hole in the case. During final assembly of the case halves, the pin retaining bolt (1) must be able to pass through the hole in the cross pin.
  5. With the pin and case aligned, release the pressure from the press and remove the J 42162 and bolt. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  6. Install the gear to the left intermediate shaft.
  7. Install the C-clip to the left intermediate shaft.
  8. Using the J 42170 and a hydraulic press, install the left side bearing to the differential. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  9. Install the left clutch pack to the left case. Install the separator plates (1). Install the friction discs (2). Install the friction disc (thick) (3). Install the bellville washer (4).
  10. Install the left intermediate shaft and gear to the left case.
  11. Assemble the case halves.
  12. Install the case bolts. Tighten: Tighten the bolts to 55 N.m (41 lb ft).
  13. Using the J 42170 and a hydraulic press, install the right side bearing to the differential. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .

Differential Side Bearings Assemble

Tools Required

  1. DT-48008 Press Support/Pinion Bearing Installer. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  2. DT-48009-2 Gage Plate Assembly. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  3. DT-48009-3 Depth Gage. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  4. J 42155 Getrag Axle Differential Housing Lifting Tool. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  5. J 42168-1 Shim Measuring Tool. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  6. J 42168-2 Shim Measuring Tool. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  7. J 42168-9 Shim Measuring Tool. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  8. J 42168-11 Shim Measuring Tool. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  9. J 42168-15 Compressor Assembly. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  10. J 42168-16 Spacers. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  11. J 42170 Getrag Axle Bearing Race Installer. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  12. J-42173-A Differential Holding Fixture. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  1. Remove the J 42168-9 (1) and thumbscrew from the J 42168-1 (2). See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  2. Remove the J 42168-1 from the left bearing cup bore of the differential housing. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  3. Install the DT-48009-2 into a vice. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  4. Position the bearing cup (2) onto the DT-48009-2 (3). See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  5. Use the J 42155 in order to position the differential case (1) onto the DT-48009-2 (3) and into the bearing cup (2). See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) . Rotate the differential, in both directions, in order to seat the bearing to the cup.
  6. Install the DT-48009-3 (2) into the hole in J 42168-2 (1). See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) . Loosen the thumbscrew and allow the rod to contact the bottom of the bearing cup bore, machined surface (3).
  7. Tighten the thumbscrew.
  8. Remove the DT-48009-3 from the J 42168-2 (1). See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  9. Using a ring gear bolt, attach the DT-48009-3 (2) to the ring gear side of the differential (1). See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  10. Rotate the differential until the rod of DT-48009-3 (2) is above the DT-48009-2 (3) gage block. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  11. The DT-48009-2 upper gage block location (1) is used when servicing 2. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .56 and 2.93 ratio differentials.
  12. Using a feeler gage, measure the distance between the rod of DT-48009-3 (1) and the gage block of DT-48009-2 (2). See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) . Record the measurement as dimension C1.
  13. Subtract C1 value from a C nominal value of 5 mm (0.197 in). Record that calculation as C2. Refer to the applicable calculation table in «Spacer and Shim Specifications»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__spacer-and-shim-specifications) .
  14. Locate the A2 value (2) on the side of the ring gear.
  15. Subtract the D nominal value of 74.5 mm (2.93 in) from the A2 value. Record the calculation as C3.
  16. Add the C2 value to the C3 value for the proper left side differential bearing shim thickness. The C3 value may be a positive, negative, or zero value.
  17. Select shims equal to the calculated value. It may be necessary to round the shim or shims total to obtain the proper shim sizes. If the shim thickness calculation is past the midpoint value, round the number to the next decimal value. Refer to «Rear Axle Specifications»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__rear-axle-specifications) .
  18. Remove the pinion housing/cage bolts (1).
  19. Remove the pinion housing/cage (4) from the differential.
  20. Remove the J 42168-11 , bearings (3 and 6), spacer (5), and the J 42168-2 (7) from the pinion housing/cage (4). See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  21. Use the DT-48008 (4), the J 42170 (1) and a hydraulic press in order to install the selected shim (3) and bearing cup (2) to the differential housing. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  22. Install the differential assembly (1) onto the J-42173-A (2). See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  23. Install 4 M8 x 1.25 bolts (3). Tighten: Tighten the bolts to 28 N.m (20 lb ft).
  24. Install the ring gear (1) to the differential. Use several bolts to properly align the ring gear to the case. A hammer and brass punch may be used to aid in seating the ring gear onto the differential case.
  25. Install the NEW ring gear bolts (2).
  26. Position the differential assembly onto the J-42173-A . See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) . Tighten: Tighten the ring gear bolts to 195 N.m (144 lb ft) - 1st design. Tighten: Tighten the ring gear bolts to 145 N.m (107 lb ft) - 2nd design.
  27. Use the J 42155 in order to install the differential case into the differential housing. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  28. Install the right side bearing cup (104), and the J 42168-15 onto the differential. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  29. Install the right cover (3) and J 42168-16 bolts (1) and spacers (2) to the differential. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) . Position the J 42168-16 bolts and spacers evenly apart. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) . Tighten: Tighten the bolts to 28 N.m (20 lb ft).
  30. Insert a feeler gage into the J 42168-15 and measure the gap. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) . The measured dimension is the right side differential bearing shim size.
  31. Remove the bolts (1), cover (3), and tools.
  32. Install the selected shim (103) and bearing cup (104) to the right cover.
  33. Using the J 42170 and a hydraulic press, install the shim or shims and bearing cup into the right cover. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) . Refer to «Rear Axle Assemble»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__rear-axle-assemble) .

Drive Pinion Assemble

Tools Required

  1. J 42164 Getrag Axle Pinion Gear Holder. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  2. J 42170 Getrag Axle Bearing Race Installer. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  3. J 42172 Getrag Axle Bearing Race Installer. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  1. Using the J 42170 (1), the J 42164 (2), and a hydraulic press, install the bearing onto the pinion shaft. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  2. Assemble the pinion shaft (119), spacer (29), and bearing (31) into the housing/cage (4).
  3. Using the J 42170 (1), the J 42164 (2), and a hydraulic press, install the bearing onto the pinion shaft. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  4. Using a torque wrench, the J 42172 (1), and the J 42164 (2), install the nut onto the pinion shaft. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) . Tighten: Tighten the nut to 500 N.m (370 lb ft).
  5. Using a punch, stake the areas of the nut into the notches in the end of the pinion shaft.
  6. Using the J 42164 , measure the rotating torque of the pinion shaft. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) . A properly assembled pinion shaft and bearings should have a rotating torque of 1.4-2.8 N.m (12-25 lb in).

Rear Axle Assemble

Tool Required

  1. J 8001 Dial Indicator Set. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  2. J 42155 Getrag Axle Differential Housing Lifting Tool. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  3. J 42164 Getrag Axle Pinion Gear Holder. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  4. J-42173-A Differential Holding Fixture. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  5. J 46405 Output Shaft Seal Installer. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  1. Assemble the drive pinion prior to rear axle assembly. Refer to «Drive Pinion Assemble»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__drive-pinion-assemble) .
  2. Using the J 46405 , install the oil seal into the left cover. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  3. Using the J 46405 , install the oil seal into the right cover. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  4. Install the pinion housing assembly (4) and the selected shim or shims (19) to the differential housing. Refer to «Drive Pinion Shim Selection»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__drive-pinion-shim-selection) for shim selection. The use of M8 x 1.25 dowels or long bolts will ease in pinion housing/cage and shim installation and alignment.
  5. Install the pinion housing/cage bolts (7). Tighten: Tighten the bolts to 28 N.m (20 lb ft).
  6. Install the J 42155 into the groove of the output shaft in order to install the differential case assembly. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  7. Install the C-clip (115) into the groove of the output shaft.
  8. Apply threadlocker GM P/N 12345382 (Canadian P/N 10953489), or equivalent, to the threads (2) of the bolts (21).
  9. Apply sealant GM P/N 1052942 (Canadian P/N 10953466), or equivalent, to the head (1) of the bolts (21), only to seal them. Also apply to the threads (3) of the stud (22) that goes into the carrier.
  10. Install the adapter (23) and bolts (21). Tighten: Tighten the bolts to 10 N.m (89 lb in).
  11. Install 2 M10 x 1.5 nuts onto the transmission stud (22). Install the stud into the adapter. Tighten: Tighten the stud to 42 N.m (31 lb ft).
  12. Install the O-ring (9) on the right cover (3) and the dowel (10) into the carrier.
  13. Install the right cover and bolts (7). Tighten: Tighten the bolts to 28 N.m (20 lb ft).
  14. Install the J 8001 onto the transmission stud. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) . Position the tip of the dial indicator against the center of the ring gear tooth surface.
  15. Install the J 42164 into the splines of the pinion. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) . You must hold J 42164 to retain the pinion in order to properly measure backlash. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  16. Move the right output shaft in both directions in order to measure the gear backlash. Measure the backlash in two to three locations at the ring gear teeth while holding the pinion shaft. Refer to «Rear Axle Specifications»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__rear-axle-specifications) .
  17. Install the cover - rear (5), bolt (16), and gasket (17). Tighten: Tighten the bolt to 10 N.m (89 lb in).
  18. Remove the bolts (3) and the differential assembly (1) from the J-42173-A (2). See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle__special-tools) .
  19. Install the O-ring (9) on the left cover (2).
  20. Install the magnet (15) and dowel (10) to the carrier.
  21. Install the left cover (2) and bolts (7). Tighten: Tighten the bolts to 28 N.m (20 lb ft).
  22. Install the drain plug and washer (25). Tighten: Tighten the drain plug to 35 N.m (26 lb ft).
  23. Refer to «Rear Axle Lubricant Replacement»(/cadillac/xlr/i-2003-2009/remont/differentials-drive-axles/#rear-drive-axle) .

Scheme 4

Scheme 4: Getrag Differential
Scheme 4: Getrag Differential

The vehicle is powered by the 4.6 liter V8 engine, RPO LH2 or the 4.2 liter V8 engine, RPO LC3. Motion is transferred from the engine crankshaft/flywheel through the driveline support, propeller shaft, assembly to the 5L50-E or 6L80 automatic transmission. The splined output shaft of the transmission drives the pinion, which in turn, rotates the ring gear and differential case assembly. The limited slip differential distributes torque/power to the rear wheels via individual axle shaft assemblies. The limited-slip differential is of a conventional separator plate and friction disc type design.

The differential housing, side covers, pinion housing, and differential case halves are constructed of cast aluminum. The internal components incorporate a hypoid gear set, ring and pinion, carrier assembly, and pinion housing assembly. The pinion is supported in a pinion housing by tapered roller bearings. The pinion is positioned rearward of the ring gear centerline.

Pinion position, ring gear position, and carrier bearing preload are determined by shimming procedures.

All models have an 8 inch ring gear. Each ring gear has specific setup dimensions, A1 and A2 values, stamped onto the side area of the gear. The A1 and A2 values are unique to each ring gear/pinion and are determined during the manufacturers gear/pinion noise and vibration setup and testing.

The differential assembly is available in 2 gear ratios. The 2.93 ratio axle is standard. The 2.56 ratio axle is for the XLRV.

Special Tools

Special Tools Illustration Tool Number/Description DT-47596 Bearing Cup Remover DT-48005 Pinion Bearing Remover DT-48008 Press Support/Pinion Bearing Installer DT-48009-2 Gage Plate Assembly DT-48009-3 Depth Gage J 8001 Dial Indicator Set J 25070 Heat Gun - 500-750F J 42055 Drivetrain Support Fixture J 42155 Getrag Axle Differential Housing Lifting Tool J-42159-A Differential Side Bearing Remover J 42162 Getrag Axle Side Gear Compressor J 42164 Getrag Axle Pinion Gear Holder J 42166 Getrag Axle Front Pinion Bearing Remover J 42168-1 Shim Measuring Tool J 42168-2 Shim Measuring Tool J 42168-9 Shim Measuring Tool J 42168-11 Shim Measuring Tool J 42168-15 Compressor Assembly J 42168-16 Spacers J 42170 Getrag Axle Bearing Race Installer J 42172 Getrag Axle Bearing Race Installer J 42173-A Differential Holding Fixture J 45124 Removal Bridge J 46405 Output Shaft Seal Installer

Scheme 5

Scheme 5: Special Tools
Scheme 5: Special Tools

Scheme 6

Scheme 6
Scheme 6

Scheme 7

Scheme 7
Scheme 7

Scheme 8

Scheme 8
Scheme 8

Scheme 9

Scheme 9
Scheme 9

Scheme 10

Scheme 10
Scheme 10

Scheme 11

Scheme 11
Scheme 11

Scheme 12

Scheme 12
Scheme 12

Scheme 13

Scheme 13
Scheme 13

Scheme 14

Scheme 14
Scheme 14

Scheme 15

Scheme 15
Scheme 15

Scheme 16

Scheme 16
Scheme 16

Scheme 17

Scheme 17
Scheme 17

Scheme 18

Scheme 18
Scheme 18

Scheme 19

Scheme 19
Scheme 19

Scheme 20

Scheme 20
Scheme 20

See also:
• Wheel Drive Shafts Description and Operation
• Strategy Based Diagnosis
• Checking Aftermarket Accessories
• Diagnostic Starting Point - Vibration Diagnosis and Correction
• Diagnostic Starting Point - Automatic Transmission
• Symptoms - Propeller Shaft
• Symptoms - Automatic Transmission
• Lifting and Jacking the Vehicle
• Fastener Notice
• BATTERY DISCONNECT CAUTION
• Tire and Wheel Removal and Installation
• Transmitter Programming (Domestic and Japan)
• Transmitter Programming (Export - Including Canada)
• Wheel Drive Shaft Replacement
• Exhaust Muffler Replacement - Left Side
• Electronic Suspension Rear Position Sensor Replacement
• Rear Axle Upper Control Arm Replacement
• Rear Axle Disassembled Views
• Noisy in Drive
• Noisy When Coasting
• Intermittent Noise
• Constant Noise
• Noisy on Turns
• Rear Axle Lubricant Leak Diagnosis
• Sealers, Adhesives, and Lubricants
• Lubrication Specifications
• Special Tools
• Spacer and Shim Specifications
• Rear Axle Specifications
• Differential Side Bearings Assemble
• Rear Axle Assemble
• Drive Pinion Shim Selection
• Drive Pinion Assemble