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Rear Drive Axle Cadillac CTS I

Differentials & Drive Axles 31 illustrations ~5394 words

Fastener Tightening Specifications

ApplicationSpecification
MetricEnglish
Differential Housing Cover Bolts29 N.m21 lb ft
Differential Ring Gear Bolts185 N.m136 lb ft
Differential Support Mounting Bolts175 N.m129 lb ft
Drain Plug39 N.m29 lb ft
Fill Plug39 N.m29 lb ft
Pinion Cage Bolts29 N.m21 lb ft
Pinion Nut265 N.m195 lb ft
Propeller Shaft Coupler-to-Differential Flange Bolts85 N.m63 lb ft

Fastener Tightening Specifications

Rear Axle Specifications

ApplicationSpecification
MetricEnglish
Differential Case Shim Sizes3.5-4.4 mm.14-.17 in
Pinion Housing Shim Sizes1.2-1.9 mm.04-.07 in
Pinion Rotating Torque w/seals2.5-4 N.m22-35 lb in
Ring Gear/Pinion A1 Nominal Value-All Axles111.00 mm4.37 in
Ring Gear/Pinion A2 Nominal Value-3.42 Ratio Axles63.5 mm2.50 in
Ring Gear/Pinion A2 Nominal Value-3.73 Ratio Axle63.5 mm2.50 in
Ring Gear/Pinion A2 Nominal Value-3.91 Ratio Axle63.5 mm2.50 in
Torsional Backlash
3.42 Ratio with 96 mm Flange0.22-0.35 mm.009-.014 in
3.23 Ratio with 96 mm Flange0.21-0.34 mm.008-.013 in
3.91 Ratio with 96 mm Flange0.25-0.41 mm.010-.016 in
2.73 Ratio with 105 mm Flange0.20-0.31 mm.007-.012 in
3.23 Ratio with 105 mm Flange0.23-0.37 mm.009-.014 in
3.42 Ratio with 105 mm Flange0.24-0.38 mm.009-.015 in
3.73 Ratio with 86 mm Round Flange0.21-0.34 mm.008-.013 in

Rear Axle Specifications

Scheme 1

Scheme 1: Rear Axle Usage
Scheme 1: Rear Axle Usage
CalloutComponent Name
1Ratio
2GM Part Number
3Getrag Part Number
4Serial Number
Axle RatioDrive/EngineFlange Size
3:23RWD/3.6L V6105 mm
3:42RWD/3.2L V696 mm
3:42RWD/2.8L V6105 mm
3:73RWD/5.7L V886 mm
3:91RWD/2.6L V696 mm

Available Axle Ratios

Spacer and Shim Specifications

CalculationsExample MeasurementsActual Measurements
MetricEnglishMetricEnglish
B Nominal Value5.00 mm0.197 in5.00 mm0.197 in
B1 Measured Value3.31 mm0.130 in
B2 (B Nominal Value Minus B1 = B2)1.69 mm0.067 in
A1 Value (Taken from Ring Gear)111.03 mm4.371 in
A Nominal Value111.00 mm4.37 in111.00 mm4.37 in
B3 (A1 Value Minus A Nominal = B3)0.03 mm0.0012 in
B21.69 mm0.0665 in
B30.03 mm0.0012 in
Pinion Shim Size (B2 Plus B3 = Pinion Shim)1.72 mm0.0677 in

Pinion Shim Calculation Table with an A1 Value Greater Than 111.00 mm (4.37 in)

CalculationsExample MeasurementsActual Measurements
MetricEnglishMetricEnglish
B Nominal Value5.00 mm0.197 in5.00 mm0.197 in
B1 Measured Value3.31 mm0.130 in
B2 (B Nominal Value Minus B1 = B2)1.69 mm0.067 in
A1 Value (Taken from Ring Gear)110.97 mm4.369 in
A Nominal Value111.00 mm4.37 in111.00 mm4.37 in
B3 (A1 Value Minus A Nominal = B3)0.03 mm0.0011 in
B21.69 mm0.067 in
B30.03 mm0.0011 in
Pinion Shim Size (B2 Plus B3 = Pinion Shim)1.66 mm0.0654 in

Pinion Shim Calculation Table with an A1 Value Less Than 111.00 mm (4.37 in)

CalculationsExample MeasurementsActual Measurements
MetricEnglishMetricEnglish
C Nominal Value5.00 mm0.197 in5.00 mm0.197 in
C1 Measured Value3.10 mm0.122 in
C2 (C Nominal Value Minus C1 = C2)1.90 mm0.075 in
A2 Value (Taken from Ring Gear)63.53 mm2.501 in
D Nominal Value63.50 mm2.5 in63.5 mm2.5 in
C3 (A2 Value Minus D Nominal = C3)0.03 mm0.0012 in
C21.90 mm0.0748 in
C30.03 mm0.0012 in
Left Side Case Shim (C2 Plus C3 = Left Side Shim)1.93 mm0.0736 in

Differential Case Left Side Shim Calculation Table with an A2 Value Greater Than 63.5 mm (2.5 in)

CalculationsExample MeasurementsActual Measurements
MetricEnglishMetricEnglish
C Nominal Value5.00 mm0.197 in5.00 mm0.197 in
C1 Measured Value3.10 mm0.122 in
C2 (C Nominal Value Minus C1 = C2)1.90 mm0.75 in
A2 Value (Taken from Ring Gear)63.47 mm2.499 in
D Nominal Value63.5 mm2.5 in63.5 mm2.50 in
C3 (A2 Value Minus D Nominal = C3)0.03 mm0.0012 in
C21.90 mm0.0748 in
C30.03 mm.0012 in
Left Side Case Shim (C2 Plus C3 = Left Side Shim)1.87 mm0.0736 in

Differential Case Left Side Shim Calculation Table with an A2 Value Less Than 63.5 mm (2.5 in)

Lubrication Specifications

ApplicationQuantity
MetricEnglish
Differential Lubricant GL 75W90 G/M P/N United States 12378261, GM P/N Canada 109534551.3L1.37 qt

Capacities

Sealers, Adhesives, and Lubricants

ApplicationType of MaterialGM Part Number
USCanada
Pinion NutThread Locker1234538210953489

Sealers, Adhesives, and Lubricants

Scheme 2

Scheme 2: Rear Axle Disassembled Views
Scheme 2: Rear Axle Disassembled Views
CalloutComponent Name
1Differential Carrier
2Carrier Cover
3Pinion Bearing Cage
4Nut
5Flange
6Pinion Oil Seal
7Bearing
8Cup
9Bolt
10Shim
11O-ring Seal
12Pinion Bearing Spacer
13Cup
14Bearing
15Support Bushing
16Axle Oil Seal
16Axle Oil Seal
17Drain Plug
18Shim
18Shim
19Cup
19Cup
20O-ring Seal
21Vent
22Fill Plug
23Bolt
24Fill Plug Washer
100Differential Assembly
110Pinion Gear

Scheme 3

Scheme 3
Scheme 3
CalloutComponent Name
101Bearing
101Bearing
102Bolt
104Differential Case
105Ring Gear

Begin the system diagnosis by reviewing the Rear Axle Disassembled Views and Rear Drive Axle Description and Operation and Wheel Drive Shafts Description and Operation in Wheel Drive Shafts. Reviewing the description and operation information will help you determine the correct symptom diagnostic procedure when a malfunction 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 problem. 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/cts/i-2002-2007/remont/body-electrical/#wiring-systems-diagnostic-information-and-procedures__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. Check 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/cts/i-2002-2007/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/cts/i-2002-2007/remont/automatic-trans/#automatic-transmission-5l40-e-diagnostic-information-procedures__diagnostic-starting-point-automatic-transmission) in Automatic Transmission - 5L40-E
  3. «Transmission Noisy»(/cadillac/cts/i-2002-2007/remont/manual-trans/#manual-transmission-m35) in Manual Transmission - M35
  4. «Clutch Noisy»(/cadillac/cts/i-2002-2007/remont/clutches-manual-hydraulic/#manual-transmission-clutch-system__clutch-noisy) in Clutch
  5. «Noisy in Drive»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle__noisy-in-drive)
  6. «Noisy When Coasting»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle__noisy-when-coasting)
  7. «Intermittent Noise»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle__intermittent-noise)
  8. «Constant Noise»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle__constant-noise)
  9. «Noisy on Turns»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle__noisy-on-turns)
  10. «Rear Axle Lubricant Leak Diagnosis»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle__rear-axle-lubricant-leak-diagnosis)

Noisy in Drive

CauseCorrection
Inspect for the proper gear oil levels prior to performing system diagnosis. Refer to Lubricant Level Inspection - Rear Drive Axle .
Worn clutch disc and/or pressure plate assemblyRepair or replace as required. Refer to Clutch Noisy in Clutch.
Transmission noiseRepair or replace as required. Refer to Transmission Noisy in Manual Transmission - M35 or Diagnostic Starting Point - Automatic Transmission in Automatic Transmission - 5L40-E.
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. Check 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 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. Check for the proper fluid level. Fill as required. Repair or replace the unit as required.

Noisy in Drive

Noisy When Coasting

CauseCorrection
IMPORTANT: Inspect for the proper gear oil levels prior to performing system diagnosis. Refer to Lubricant Level Inspection - Rear Drive Axle .
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. Check 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. Check 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 Lubricant Level Inspection - Rear Drive Axle .

Noisy When Coasting

Intermittent Noise

CauseCorrection
IMPORTANT: Inspect for the proper gear oil levels prior to performing system diagnosis. Refer to Lubricant Level Inspection - Rear Drive Axle .
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 Lubricant Level Inspection - Rear Drive Axle .

Intermittent Noise

Constant Noise

CauseCorrection
IMPORTANT: Inspect for the proper gear oil levels prior to performing system diagnosis. Refer to Lubricant Level Inspection - Rear Drive Axle .
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 and Lubricant Level Inspection - Rear Drive Axle .
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. Check 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. Check 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 Lubricant Level Inspection - Rear Drive Axle .

Constant Noise

Noisy on Turns

CauseCorrection
IMPORTANT: Inspect for the proper gear oil levels prior to performing system diagnosis. Refer to Lubricant Level Inspection - Rear Drive Axle . 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 oilFill to the proper level with the correct gear oil and friction modifier additive. Refer to Sealers, Adhesives, and Lubricants and Lubricant Level Inspection - Rear Drive Axle .
IMPORTANT
Inspect for the proper gear oil levels prior to performing system diagnosis. Refer to Lubricant Level Inspection - Rear Drive Axle . 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 Lubricant Level Inspection - Rear Drive Axle and Lubrication Specifications .
Restricted or damaged vent valve assemblyRepair or replace the vent valve as required.
Left 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.
Housing or side cover porosityReplace the housing and/or the covers as required.
Loose Drain or Fill PlugTighten to specification
Pinion Cage Assembly O-RingPull Cage Assembly Replace O-Ring
IMPORTANT
Upon completion of all repairs, refill the axle with the proper amounts of axle lubricant and friction modifier additive. Refer to Lubricant Level Inspection - Rear Drive Axle and Lubrication Specifications .

Rear Axle Lubricant Leak Diagnosis

Scheme 4

Scheme 4: Draining Procedure
Scheme 4: Draining Procedure
  1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/cts/i-2002-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
  2. Clean any dirt from around the differential drain plug.
  3. Position a drain pan under drain plug.
  4. Remove the drain plug from the differential and drain the fluid.

Filling Procedure

  1. Install the drain plug to the differential. Tighten: Tighten the differential drain plug to 39 N.m (29 lb ft).
  2. Clean any dirt from around the differential fill plug.
  3. Remove the fill plug from the differential.
  4. Fill the differential with 75W90 synthetic axle lubricant, GM P/N 12378261 (Canadian P/N 10953455) or equivalent. Refer to «Capacities - Approximate Fluid»(/cadillac/cts/i-2002-2007/remont/lubrication-system/#maintenance-and-lubrication__capacities-approximate-fluid) in Maintenance and Lubrication.
  5. Inspect the gear lubricant 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 to the differential. Tighten: Tighten the fill plug to 39 N.m (29 lb ft).
  7. Lower the vehicle.

Scheme 5

Scheme 5: Inspection Procedure
Scheme 5: Inspection Procedure
  1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/cts/i-2002-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
  2. Clean any dirt from around the differential fill plug.
  3. Remove the fill plug from the differential and drain the fluid.
  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.
  6. Fill the differential with 75W90 synthetic axle lubricant, GM P/N 12378261 (Canadian P/N 10953455) or equivalent. Refer to «Capacities - Approximate Fluid»(/cadillac/cts/i-2002-2007/remont/lubrication-system/#maintenance-and-lubrication__capacities-approximate-fluid) in Maintenance and Lubrication.
  7. Install the differential fill plug to the differential. Tighten: Tighten the differential fill plug to 39 N.m (29 lb ft).
  8. Lower the vehicle.

Tools Required

J 45017 Output Shaft Seal Installer. See Special Tools and Equipment .

Removal Procedure

  1. Raise and suitably support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/cts/i-2002-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
  2. Remove the appropriate rear tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/cadillac/cts/i-2002-2007/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
  3. Remove the appropriate wheel drive shaft. Refer to «Wheel Drive Shaft Replacement»(/cadillac/cts/i-2002-2007/remont/axle-shafts/#wheel-drive-shafts) in Wheel Drive Shafts.
  4. Using a flat bladed tool remove the differential output shaft seal. Take care not to damage any sealing surfaces.

Installation Procedure

  1. Lubricate the wheel drive shaft sealing surface of the oil seal with 75W90 synthetic axle lubricant, GM P/N United States 12378261 Canada P/N 10953455 or equivalent.
  2. Install the differential output shaft seal (2) to the J 45017 . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  3. Using the J 45017 (1), install the differential output shaft seal (2). See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  4. Remove J 45017 (1) from the differential output shaft seal (2). See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  5. Install the wheel drive shaft. Refer to «Wheel Drive Shaft Replacement»(/cadillac/cts/i-2002-2007/remont/axle-shafts/#wheel-drive-shafts) in Wheel Drive Shafts.
  6. Inspect the fluid level. Refer to «Lubricant Level Inspection - Rear Drive Axle»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  7. Install the rear tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/cadillac/cts/i-2002-2007/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
  8. Lower the vehicle.

Drive Pinion Flange/Yoke and/or Oil Seal Replacement

Tools Required

  1. J 45005 Seal Installer. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  2. J 45012 Holding Fixture. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  3. J 45019 Flange and Pinion Cage Remover. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  4. J 34826 Hub Nut Socket (36 mm). See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  1. Raise and support vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/cts/i-2002-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
  2. Remove the propeller shaft coupler-to-differential flange bolts and nuts.
  3. Push the rear propeller shaft toward the front of the vehicle in order to release the propeller shaft coupler from the differential pinion flange.
  4. Position the propeller shaft out of the way.
  5. Install the J 45012 to the drive pinion flange. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  6. While holding the J 45012 remove the drive pinion nut, using J 34826 . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  7. Remove J 45012 from the drive pinion flange. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  8. Install the J 45019 to the drive pinion flange. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  9. Using J 45019 remove the drive pinion flange. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  10. Using a flat bladed tool remove the drive pinion seal. Take care not to damage any sealing surfaces.
  1. Lubricate the drive pinion flange sealing surface of the drive pinion seal with synthetic gear oil GM P/N United States 12378514 (Canadian P/N 88901045) or equivalent.
  2. Install the drive pinion seal to the J 45005 . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  3. Using J 45005 install the new drive pinion seal to the differential. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  4. Remove the J 45005 from the new drive pinion seal. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  5. Remove the J 45019 from the drive pinion flange. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  6. Install the J 45012 to the drive pinion flange. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  7. Install the pinion flange to the drive pinion shaft.
  8. Prepare the pinion shaft threads and the pinion flange nut for assembly: Thoroughly clean the residue from the pinion shaft threads by using denatured alcohol or equivalent and allow to dry. Thoroughly clean the residue from the pinion flange nut by using denatured alcohol or equivalent and allow to dry.
  9. Apply threadlocker GM US P/N 12345382, (Canadian P/N 10953489), or equivalent to two-thirds of the threaded length of the pinion shaft threads. Ensure that there are no gaps in the threadlocker along the length of the filled area of the pinion shaft threads.
  10. Allow the threadlocker to cure approximately ten minutes before installation.
  11. Install the drive pinion flange nut to the pinion shaft. While holding the J 45012 use J 34826 to tighten the drive pinion nut. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) . Tighten: Tighten the pinion flange nut to 285 N.m (210 lb ft).
  12. Remove the J 45012 from the pinion flange. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  13. Install the propeller shaft coupler-to-differential flange bolts and nuts. Tighten: Tighten the propeller shaft coupler-to-differential flange bolts to 85 N.m (63 lb ft).
  14. Inspect the fluid level. Refer to «Lubricant Level Inspection - Rear Drive Axle»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  15. Lower the vehicle.

J 44394 Seal Protector

  1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/cts/i-2002-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
  2. Remove propeller shaft. Refer to «Propeller Shaft Replacement (Automatic Transmission)»(/cadillac/cts/i-2002-2007/remont/driveshaft-universal-joints/#propeller-shaft) or «Propeller Shaft Replacement (Manual Transmission)»(/cadillac/cts/i-2002-2007/remont/driveshaft-universal-joints/#propeller-shaft) or «Propeller Shaft Replacement (CTS-V)»(/cadillac/cts/i-2002-2007/remont/driveshaft-universal-joints/#propeller-shaft) in Propeller Shaft.
  3. Remove the right rear tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/cadillac/cts/i-2002-2007/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
  4. Remove the right wheel drive shaft. Refer to «Wheel Drive Shaft Replacement»(/cadillac/cts/i-2002-2007/remont/axle-shafts/#wheel-drive-shafts) in Wheel Drive Shafts.
  5. Position a transmission jack beneath the differential.
  6. Firmly secure the differential to the transmission jack.
  7. Remove the front differential to support mounting bolt (1) and nut.
  8. Remove the left rear differential to support mounting bolt (1). Note that the rear differential support mounting bolts will not be able to be removed completely due to interference with the underbody.
  9. Remove the right rear differential to support mounting bolt (1).
  10. Lower the jack slightly until the mounting ear at the front of the differential clears the support attachment point.
  11. Using a suitable tool, carefully release the wheel drive shaft from the differential enough to install the J 44394 .
  12. Carefully install J 44394 the over the wheel drive shaft.
  13. Carefully slide the J 44394 into the differential output shaft seal.
  14. Continue lowering the jack, while simultaneously disengaging the left wheel drive shaft.
  15. Remove the differential from the vehicle.
  1. If reusing the wheel drive shaft remove and discard the wheel drive shaft retaining ring. The wheel drive shaft retaining ring is on the splined shaft of the inner tripod housing.
  2. Install the new wheel drive shaft retaining ring. The wheel drive shaft retaining ring is on the splined shaft of the inner tripod housing.
  3. If previously removed carefully install J 44394 into the left differential output shaft seal.
  4. With the differential firmly attached to the jack, raise the differential while carefully installing the left wheel drive shaft into the differential until the splines are past the J 44394 .
  5. Carefully remove the J 44394 from the differential.
  6. Carefully remove J 44394 from the left wheel drive shaft.
  7. Carefully install the wheel drive shaft into the differential until the retaining ring is engaged.
  8. Ensure the wheel drive shaft retaining ring is fully engaged to the differential by grasping the inner housing and pulling outward. The wheel drive shaft will stay positively engaged if properly installed to the differential.
  9. Install the front differential to support mounting bolt (1) in order to locate the differential to the rear support.
  10. Hand install the nut to the bolt.
  11. With the differential firmly attached to the jack, raise the differential to the rear support.
  12. Position the differential to the support.
  13. Hand install the left rear differential to support mounting bolt (1).
  14. Hand install the right rear differential to support mounting bolt (1). Tighten: Tighten the rear differential to support mounting bolts to 175 N.m (129 lb ft). Tighten the front differential to support mounting bolt 175 N.m (129 lb ft).
  15. Remove the transmission jack.
  16. Install propeller shaft. Refer to «Propeller Shaft Replacement (Automatic Transmission)»(/cadillac/cts/i-2002-2007/remont/driveshaft-universal-joints/#propeller-shaft) or «Propeller Shaft Replacement (Manual Transmission)»(/cadillac/cts/i-2002-2007/remont/driveshaft-universal-joints/#propeller-shaft) or «Propeller Shaft Replacement (CTS-V)»(/cadillac/cts/i-2002-2007/remont/driveshaft-universal-joints/#propeller-shaft) in Propeller Shaft.
  17. Install the right wheel drive shaft. Refer to «Wheel Drive Shaft Replacement»(/cadillac/cts/i-2002-2007/remont/axle-shafts/#wheel-drive-shafts) in Wheel Drive Shafts.
  18. Install the right rear tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/cadillac/cts/i-2002-2007/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
  19. Inspect the differential lubricant level. Refer to «Lubricant Level Inspection - Rear Drive Axle»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  20. Lower the vehicle.

Rear Axle - Disassemble

Tools Required

  1. DT-47595 Bearing Cup Remover. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  2. J 24433 Pinion Cone and Side Bearing Installer. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  3. J 25070 Heat Gun
  4. J 45124 Removal Bridge. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  1. Remove the bearing carrier bolts from the pinion cage.
  2. Using the J 25070 , heat around the pinion bearing cage to ease pinion removal.
  3. Place 2 bolts in the jackscrew holes (1) and (2).
  4. Tighten the bolts equally to push out the pinion bearing cage assembly.
  5. Remove the pinion cage assembly (1), shims (2) and O-ring seal (3) from the differential carrier.
  6. Remove the 9 carrier cover bolts (6).
  7. Using the pry tabs (4, 5, 7), remove the carrier cover (3) from the differential carrier (1).
  8. Remove the O-ring seal (2) from the cover (3).
  9. Remove the differential assembly (2) from the carrier (1).
  10. Remove the axle oil seal (1) from the carrier cover (2) using J 24433 and hammer from inside the cover. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  11. Install the DT-47595 (2) into the bearing cup. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  12. Tighten the spreader bolt in order to lock the tool into the cup.
  13. Install the J 45124 (1) over the DT-47595 (2) with the center bolt. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  14. Tighten the center bolt and remove the cup and shim.
  15. Remove the axle oil seal from the carrier using J 24433 and hammer. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) . Drive out the seal.
  16. Install the J 45008 (2) behind the bearing cup (3).
  17. Place the carrier in a press.
  18. Place J 24433 (1) against J 45008 (2) and press out the cup.

J 22912-01 Split-Plate Bearing Puller

Scheme 6

Scheme 6: Ring Gear and Differential Housing Disassemble
Scheme 6: Ring Gear and Differential Housing Disassemble
  1. Remove the 10 ring gear bolts (1) and the ring gear (3) from the differential carrier (2) using a punch and a hammer through the bolt hole. NOTE: Differential gears are preloaded and cannot be disassembled or assembled in the field.
  2. Using the J 22912-01 and a press, remove the left side bearing. It may be necessary to cut the cage and remove the rollers so the tool will grip the race.
  3. Using the J 22912-01 and a press, remove the right side bearing. It may be necessary to cut the cage and remove the rollers so the tool will grip the race.

Drive Pinion Disassemble

Tools Required

  1. J 22912-01 Split-Plate Bearing Puller
  2. J 34826 Hub Nut Socket - 36 mm. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  3. J 45006 Pinion Press Pilot. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  4. J 45012 Pinion Flange Holder. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  5. J 45019 Flange and Pinion Cage Remover. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .

Scheme 7

Scheme 7
Scheme 7
  1. Remove the pinion flange nut (1) using J 34826 while holding the flange with the J 45012 and a breaker bar. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  2. Remove the pinion flange from the shaft. If the flange will not pull off, use the J 45019 with forcing screw, bolts and spacers. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  3. Place the pinion cage into a press.
  4. Remove the pinion shaft and bearing from the cage using the J 45006 and a hydraulic press. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  5. Remove the spacer from the pinion shaft.
  6. Install the J 22912-01 (2) onto the pinion shaft, under the inner-bearing race.
  7. Place the pinion shaft in a press to remove the bearing from the shaft.
  8. Install the J 45006 (1) and press the bearing from the pinion shaft. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  9. Remove the pinion oil seal (1) and the pinion bearing (2) from the bearing cage (3).

Scheme 8

Scheme 8: Differential Case
Scheme 8: Differential Case
  1. Clean the differential case in solvent.
  2. Inspect the differential case for the following conditions: Chips or cracks Damage to the bolts holes (1) Unusual wear, grooves or scoring Damaged side bearing flanges (2) Heat discoloration Worn differential pin bores (3)
  3. Clean the pinion gear in solvent.
  4. Inspect the pinion gear for the following conditions: Unusual gear teeth wear, pitting or heat discoloration (1) Pinion splines for wear, pitting or twisted splines (2) Pinion shaft thread condition (3) Ensure pinion gear end is not bent or burred over on the end (4)
  5. Clean the ring gear in solvent.
  6. Inspect the ring gear for the following conditions: Damage to the threaded holes (1) Unusual wear or heat discoloration to the gear teeth (2)
  7. Clean the pinion flange in solvent.
  8. Inspect the pinion flange for the following conditions: Splines for wear, pitting or twisting (1) Sealing surface for grooves or pitting (2)

Bearings and Races

  1. Inspect the bearing rollers and races for the following conditions: Pitting Scoring or grooves Excessive wear or other damage
  2. Inspect the bearing rollers and races 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 races. Bearings or races with sign of heat discoloration must be replaced.
  3. Inspect for bent bearing cages.
  4. Inspect for damaged bearing cages.

Scheme 9

Scheme 9: Differential Housing
Scheme 9: Differential Housing
  1. Clean the differential housing in solvent.
  2. Clean and inspect the differential housing for the following: The mounting bolt threads (3) The case cover bolt hole threads (4) The O-ring sealing surface for nicks or burrs (5) The drain plug hole threads (6) The axle seal area (2) The pinion bolt hole threads (7) The bushing bore (1) Cracks in the housing, if removed
  3. Clean the oil passage between (1) and (2), in the axle bearing bore.
  4. Clean the oil passage between (1) and (2), in the pinion carrier bore.
  5. In 2 locations (3) inspect the pinion housing surface.

Scheme 10

Scheme 10: Differential Carrier Cover
Scheme 10: Differential Carrier Cover
  1. Clean the differential carrier cover in solvent.
  2. Clean and inspect the differential carrier cover for the following: Clean the oil passage between (1) and (2), in the axle bearing bore Inspect the cover flat (3) for nicks and burrs Clean the fill plug hole threads (4) Clean the O-ring groove (5) Inspect the race and shim surfaces (6) and (7)
  3. Inspect the differential carrier cover exterior for the following: The vent for proper operation (1) The mounting bolt threads (2) The axle seal mounting surface (3)

Scheme 11

Scheme 11: Drive Pinion Carrier
Scheme 11: Drive Pinion Carrier

Scheme 12

Scheme 12
Scheme 12
  1. Clean the drive pinion carrier housing in solvent.
  2. Clean and inspect the drive pinion carrier housing for the following: Clean the oil passages between holes (1) and (2) and between holes (5) and (6) Inspect the pinion seal area (3) and the bearing races (4, 7) for damage
  3. Clean and inspect the following: The O-ring groove (2) for nicks and burrs The flat surface (3) for nicks The races (1)
  1. Remove the differential assembly. Refer to «Differential Replacement»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  2. Remove the housing support bushing.
  1. Install the housing support bushing.
  2. Install the differential assembly. Refer to «Differential Replacement»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .

J 45007 Bushing Remover/Installer. See Special Tools and Equipment .

  1. Remove the differential assembly. Refer to «Differential Replacement»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  2. Using the J 45007 , remove the housing support bushing. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  1. Using the J 45007 , install the housing support bushing. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  2. Install the differential assembly. Refer to «Differential Replacement»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .

Pinion Depth Adjustment

Tools Required

  1. J 25070 Heat Gun
  2. J 42168-9 Holding Strap. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  3. J 45013-2 Gage Assembly. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  4. J 45013-3 Gage Cylinder. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  5. J 45013-5 Gage Centering Assembly. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  6. J 45013-7 Adapter Screw. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  7. J 45019 Flange and Pinion Cage Remover. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .

Scheme 13

Scheme 13
Scheme 13
  1. Install pinion tail bearing then the pinion bearing spacer on the J 45013-5 (1). See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  2. Install the head bearing on J 45013-2 (2). See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  3. Install them into the pinion bearing cage (3) as shown.
  4. Snug the J 45013-7 . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) . This will apply the proper bearing preload determined by the custom ground spacer that is provided with the bearing kit.
  5. Install the J 45013-3 (1) into the differential carrier as shown. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  6. Turn the carrier over and attach the holding strap J 42168-9 and thumb screw (2). Snug the thumb screw.
  7. Inspect the pinion cage surfaces. Ensure that there are no nicks or burrs on the pinion cage surfaces or in the carrier bore. IMPORTANT: When installing the pinion bearing housing into the carrier, ensure that the gage rod (2) does not hit the ribbing inside the carrier.
  8. Using 2 long bolts from J 45019 as guides, align the bolt holes of the pinion cage and the carrier. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) . Snug the bolts.
  9. Apply a light coat of gear lube to the carrier bore and pinion cage in order to ease assembly.
  10. Heat the carrier using J 25070 in order to ease pinion cage assembly.
  11. While aligning the guide bolts and bolt holes, push the pinion cage into the bore of the carrier.
  12. Install the pinion cage bolts and tighten in a criss-cross pattern. Tighten: Tighten the pinion cage bolts to 29 N.m (21 lb ft).
  13. Measure the distance between the hex rod on the J 45013-2 (1) and the post on the J 45013-3 (2). See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) . Record this measurement.
  14. Subtract this measurement from 5 mm (0.196 in). This is the amount of pinion shim size value B2.
  15. Remove J 45013-3 from the carrier. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .

Differential Side Bearing Preload Adjustment

Tools Required

  1. J 24433 Pinion Cone and Side Bearing Installer. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  2. J 42168-16 Spacers. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  3. J 45010 Getrag Axle Bearing Race Installer. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  4. J 45013-1 Cover Shim Gage. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  5. J 45013-2 Gage Assembly. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  6. J 45013-4 Gage Plate. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  7. J 45013-6 Depth Gage. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .

Scheme 14

Scheme 14
Scheme 14
  1. Use the J 45013-6 (2) drop rod. Loosen the thumb screw and drop the rod through the hole on J 45013-2 (1). See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  2. Ensure the rod bottoms out in the bearing cup bore. Snug the thumb screw in order to record the distance.
  3. Install the differential side bearings. Refer to «Differential Side Bearings Assemble»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  4. Use an old ring gear bolt. Attach the J 45013-6 (2) to the differential case as shown. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  5. Ensure that the drop rod aligns with the post of J 45013-4 (1). See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  6. Snug the bolt.
  7. Measure the gap (1) between the rod and the post on J 45013-6 (2). See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) . Record the measurement as C1.
  8. Spin the differential case and ensure that the measurement stayed the same.
  9. Subtract the measured distance from 5 mm (0.197 in). This is the differential right shim value C2. Record this distance.
  10. Remove the tools.
  11. Remove the pinion cage bolts.
  12. It may be necessary to heat the carrier in order to remove the pinion bearing housing.
  13. Screw the slide hammer into the bolt that holds the shimming tools in the pinion housing.
  14. Pull the housing from the carrier.
  15. Remove all of the shimming tools.
  16. Install the shims (18) measured for the differential assembly side bearing cup (19).
  17. Lightly lubricate the cup with gear lube.
  18. Using J 24433 and J 45010 and a press, install the bearing cup until it seats. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  19. For limited slip differential, the ring gear must be properly installed in order to hold the differential case together. Refer to «Ring Gear and Differential Housing Assemble»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle__ring-gear-and-differential-housing-assemble) .
  20. Install the differential case into the differential carrier.
  21. Install the bearing cup and J 45013-1 on top of the cup as shown. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  22. Using J 42168-16 , install the bolts, spacer and washer through the cover. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) . Snug the bolts.
  23. Measure the gap as shown. This is the left side differential bearing shim side.
  24. Remove the bolts, cover and tools.
  25. Using J 24433 and J 45010 , install the measured shims (18) in the cup bore. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  26. Lightly coat the cup (19) with gear lube.
  27. Press the cup into the bore until it seats.

J 45010 Getrag Axle Bearing Race Installer. See Special Tools and Equipment .

Scheme 15

Scheme 15: Differential Side Bearings Assemble
Scheme 15: Differential Side Bearings Assemble
  1. Install the differential case right side bearing (101) using a press and J 45010 . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) . Install the right side bearing until the bearing seats.
  2. Install the differential case left side bearing (101) using a press and J 45010 . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) . Install the left side bearing until the bearing seats.
  3. After bearings are assembled, refer to «Pinion Depth Adjustment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle__pinion-depth-adjustment) .

Ring Gear and Differential Housing Assemble

  1. Install the ring gear (2) onto the differential carrier (3).
  2. Install the 10 NEW ring gear bolts (1) in order to align the gear to the hub. Tighten: Tighten the 10 ring gear bolts slowly in a criss-cross pattern to 190 N.m (140 lb ft).

Drive Pinion Assemble

Tools Required

  1. J 24433 Pinion Cone and Side Bearing Installer. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  2. J 45005 Seal Installer. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  3. J 45012 Pinion Flange Holder. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .

Scheme 16

Scheme 16
Scheme 16
  1. Install the pinion head bearing onto the pinion shaft using the J 24433 and a hydraulic press. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  2. Assemble the pinion shaft (4), the housing (2), the spacer (3) and the bearing (1).
  3. Press the bearing onto the pinion shaft using the J 24433 and a hydraulic press. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  4. Lightly lubricate the outer diameter of the seal with axle lube.
  5. Install a NEW pinion seal using the J 45005 . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  6. Install the pinion flange onto the shaft.
  7. Apply threadlocker GM P/N 12345382 (Canadian P/N 10953489) to clean the threads of the pinion nut.
  8. Install the pinion flange nut. Tighten: Tighten the pinion flange nut to 285 N.m (210 lb ft) while holding the flange with J 45012 and breaker bar. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  9. Remove J 45012 . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .

Rear Axle - Assemble

Tools Required

  1. J 24433 Pinion Cone and Side Bearing Installer. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  2. J 25070 Heat Gun
  3. J 45010 Getrag Axle Bearing Race Installer. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  4. J 45017 Output Shaft Seal Installer. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  5. J 45019 Flange and Pinion Cage Remover. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .

Scheme 17

Scheme 17
Scheme 17
  1. Install the housing support bushing, if necessary. Refer to «Differential Housing Support Bushing Replacement»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  2. Support the housing in a press in the axle seal area.
  3. Using the J 24433 (2) and the J 45010 (1) install the shim (18) and the bearing cup (19) into the differential housing. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  4. Lightly lube the outer diameter of the seal with axle lube.
  5. Using the J 45017 , install the axle oil seal into the housing. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  6. Install the selected shims or marked shims (2) on the pinion housing assembly (1) and the O-ring (3).
  7. Apply a light coat of oil to the pinion housing assembly (1) and the O-ring (3).
  8. Use the bolts from J 45019 . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  9. Align the cage bolts to the carrier bolt holes.
  10. Heat carrier with J 25070 and push the cage into place.
  11. Install the 6 pinion assembly bolts. Tighten: Tighten the 6 pinion assembly bolts in a criss-cross pattern to 25 N.m (18 lb ft).
  12. Install the differential carrier (2) into the housing (1).
  13. Lightly lube the outer diameter of the seal with axle lube.
  14. Using the J 45017 , install the axle oil seal into the differential side cover. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  15. Install the housing cover O-ring (2) into the groove on the housing cover (3).
  16. Apply a light coat of oil to the housing cover O-ring (2), install the housing cover (3) onto the housing (1).
  17. Install the 9 side cover bolts (4). Tighten: Tighten the 9 side cover bolts in a criss-cross pattern to 25 N.m (18 lb ft).
  18. Install the drain plug and fill the axle with axle lube. Refer to «Lubricant Change»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .

Backlash Adjustment

Tools Required

  1. J 45019 Flange and Pinion Cage Remover. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  2. J 8001 Dial Indicator Set. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .

Scheme 18

Scheme 18
Scheme 18

Scheme 19

Scheme 19
Scheme 19
  1. Remove 1 pinion cage bolt and install a long bolt from J 45019 . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  2. Install J 8001 as shown in order to check backlash. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) . Position the tip of the dial indicator above the center line of the flange bolt holes.
  3. Check the axle ratio on the axle tag. Refer to «Rear Axle Usage»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle) .
  4. Determine which flange is used. The 105 mm flange (1) is used with ratios 2.73, 3.23 and 3.42. The 96 mm flange (2) is used with ratios 3.42, 3.23 and 3.91. The 86 mm flange (3) is used with ratio 3.73.
  5. For backlash specification, refer to «Rear Axle Specifications»(/cadillac/cts/i-2002-2007/remont/differentials-drive-axles/#rear-drive-axle__rear-axle-specifications) .

Scheme 20

Scheme 20: Rear Drive Axle Description and Operation
Scheme 20: Rear Drive Axle Description and Operation

The differential housing, side cover and pinion housing 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 forward of the ring gear centerline. All models have a 7 5/8 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.

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

Special Tools

Special Tools Illustration Tool Number/Description DT 47595 Bearing Cup Remover J 8001 Dial Indicator Set J 22912-01 Split-Plate Bearing Puller J 24433 Pinion Cone and Side Bearing Installer J 25070 Heat Gun J 34826 Hub Nut Socket - 36 mm J 42168-9 Holding Strap J 42168-16 Spacers J 44394 Seal Protector J 45005 Seal Installer J 45006 Pinion Press Pilot J 45007 Bushing Remover/Installer J 45010 Getrag Axle Bearing Race Installer J 45012 Pinion Flange Holder J 45013-1 Cover Shim Gage J 45013-2 Gage Assembly J 45013-3 Gage Cylinder J 45013-4 Gage Plate J 45013-5 Gage Centering Assembly J 45013-6 Depth Gage J 45013-7 Adapter Screw J 45017 Output Shaft Seal Installer J 45019 Flange and Pinion Cage Remover J 45124 Removal Bridge

Scheme 21

Scheme 21: Special Tools
Scheme 21: Special Tools

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Scheme 29

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Scheme 31
Scheme 31

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
• Transmission Noisy
• Clutch Noisy
• Lifting and Jacking the Vehicle
• Fastener Notice
• Capacities - Approximate Fluid
• Tire and Wheel Removal and Installation
• Propeller Shaft Replacement (Automatic Transmission)
• Safety Glasses Caution
• 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
• Ring Gear and Differential Housing Assemble
• Pinion Depth Adjustment
• Rear Axle Specifications

More articles — Driveline/axles