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Automatic Transmission - 6l45/6l50/6l80/6l90 - Specifications Cadillac Escalade GMT900

Automatic Trans

Fastener Tightening Specifications

ApplicationRef No.*QuantitySizeSpecification
MetricEnglish
Auxiliary Fluid Cooler Bolts12 N.m106 lb in
Case Extension to Case Assembly166M10x1.5x4055 N.m41 lb ft
Control Solenoid Valve Assembly and Control Valve Lower Body Assembly to Control Valve Upper Body Assembly3106M5x0.8x558 N.m71 lb in
Control Solenoid Valve Assembly and Control Valve Lower Body Assembly to Control Valve Upper Body Assembly30910M5x0.8x458 N.m71 lb in
Control Solenoid Valve Heat Sink to Valve Body3122M5x0.8x538 N.m71 lb in
Control Valve Upper Body Assembly to Control Valve Lower Body Assembly30112M5x0.8x368 N.m71 lb in
Control (with Body and Valve) Valve Assembly to Case Assembly226M5x0.8x738 N.m71 lb in
Floor Shift Control Indicator Screw2.5 N.m22 lb in
Floor Shift Control Lever Bolt9 N.m80 lb in
Floor Shift Control Lever Knob Screw6 N.m53 lb in
Fluid Filler Tube Nut18 N.m13 lb ft
Fluid Pan Assembly to Case Assembly3018M6x1.0x209 N.m80 lb in
Fluid Pump Cover Assembly to Torque Converter Housing23113M6 1.0x4011 N.m97 lb in
Fuel Pipe Bracket Screw9 N.m80 lb in
Heat Shield to Transmission Bolts17 N.m13 lb ft
Input and Output Speed Sensor Assembly to Control Valve Upper Body Assembly3022M6x1.0x2012 N.m106 lb in
Line Pressure Test Hole Plug to Torque Converter Housing20211/8-27 NPTF11 N.m97 lb in
Manual Shaft Detent Assembly to Valve Body231M6x1.0x14.512 N.m106 lb in
Range Selector Lever to Transmission25 N.m18 lb ft
Range Selector Lever Cable Bracket Bolts22 N.m16 lb ft
Torque Converter Cover Bolts12 N.m106 lb in
Torque Converter Housing Assembly to Case Assembly39M10x1.5x5072 N.m53 lb ft
Torque Converter to Flex Plate Bolts65 N.m48 lb ft
Transmission to Engine Bolts50 N.m37 lb ft
Transmission Electrical Harness Retaining Screw9 N.m80 lb in
Transmission Fluid Cooler Pipe Bracket Bolt22 N.m16 lb ft
Transmission Mount to Crossmember Nuts50 N.m37 lb ft
Transmission Mount to Transmission Bolts50 N.m37 lb ft
*Reference number refers to the component callout number in Disassembled Views

Transmission General Specifications

Name6L806L90
RPO CodesMYCMYD
Production LocationYpsilanti, Michigan, Toledo, OH (USA), Silao, MexicoYpsilanti, Michigan, Toledo, OH (USA), Silao, Mexico
Transmission DriveRear Wheel DriveRear Wheel Drive
1st Gear Ratio4.0274.027
2nd Gear Ratio2.3642.364
3rd Gear Ratio1.5321.532
4th Gear Ratio1.1521.152
5th Gear Ratio0.8520.852
6th Gear Ratio0.6670.667
Reverse3.0643.064
Torque Converter Size - Diameter of Torque Converter Turbine258/300 mm300 mm
Pressure TapsLine PressureLine Pressure
Transmission Fluid TypeDEXRON VI®DEXRON VI®
Transmission Type: 6Six Forward GearsSix Forward Gears
Transmission Type: LLongitude MountLongitude Mount
Transmission Type: 80/90Product SeriesProduct Series
Position QuadrantP, R, N, D, MP, R, N, D, M, I
Case MaterialDie Cast AluminumDie Cast Aluminum
Transmission Net Weight (Approximate)100 kg (220 lb)110 kg (243 lb)
Maximum Trailer Towing CapacityRefer to applicable owner's manualRefer to applicable owner's manual

Fluid Capacity Specifications

ApplicationSpecification
MetricEnglish
Pan Removal and Filter Replacement - Approximate Capacity (6L80/6L90)5.7 liters6.0 quarts
Overhaul - Approximate Capacity (6L80/6L90)9.9 liters10.5 quarts
Complete Trans System - Approximate Capacity (6L80)11.5 liters12.2 quarts
Complete Trans System (Heavy Duty Cooling) - Approximate Capacity (6L80/6L90)11.7 liters12.4 quarts

Fluid Pump Selective Specifications

Size ClassificationThickness (mm)Thickness (in)
NOTE: Rotor and slide must be chosen from the same size classification as the oil pump body. Allowable rotor and slide to fluid pump body end play is as follows: Specification: Slide to Fluid Pump Body End Play - 0.020-0.051 mm (0.0008-0.0020 in) Rotor to Fluid Pump Body End Play - 0.020-0.051 mm (0.0008-0.0020 in) The fluid pump assembly has selective rotor and slide components. These components are chosen based on pump body dimensions. Fluid pump rotor and slide components are available in three size classifications (1, 2, 3) with the following tolerances
Rotor Selection
117.948-17.9610.7066-0.7071
217.961-17.9740.7071-0.7076
317.974-17.9870.7076-0.7081
Slide Selection
117.948-17.9610.7066-0.7071
217.961-17.9740.7071-0.7076
317.974-17.9870.7076-0.7081
NOTE
Rotor and slide must be chosen from the same size classification as the oil pump body. Allowable rotor and slide to fluid pump body end play is as follows: Specification: Slide to Fluid Pump Body End Play - 0.020-0.051 mm (0.0008-0.0020 in) Rotor to Fluid Pump Body End Play - 0.020-0.051 mm (0.0008-0.0020 in)

Clutch Backing Plate Retaining Ring Specifications (6L80)

Clutch Pack Travel Specification - 1.21-1.79 mm (0.048-0.070 in)
Retaining Ring ThicknessO.D. Color
MetricEnglish
NOTE: After measuring clutch pack travel, determine if the measurement is within the specification. If the measurement is not within the specification, measure the thickness of the existing retaining ring, and then choose a thicker or thinner retaining ring that will bring the measurement within specification.
1.61-1.71 mm0.063-0.067 inGray
1.88-1.98 mm0.074-0.078 inLight Green
2.15-2.25 mm0.085-0.089 inYellow
2.42-2.52 mm0.095-0.099 inNone
2.69-2.79 mm0.106-0.110 inPurple
NOTE
After measuring clutch pack travel, determine if the measurement is within the specification. If the measurement is not within the specification, measure the thickness of the existing retaining ring, and then choose a thicker or thinner retaining ring that will bring the measurement within specification.

3-5 Reverse Clutch

Clutch Pack Travel Specification - 1.53-1.99 mm (0.060-0.078 in)
Retaining Ring ThicknessO.D. Color
MetricEnglish
NOTE: After measuring clutch pack travel, determine if the measurement is within the specification. If the measurement is not within the specification, measure the thickness of the existing retaining ring, and then choose a thicker or thinner retaining ring that will bring the measurement within specification.
2.42-2.52 mm0.095-0.099 inNone
2.69-2.79 mm0.106-0.110 inPurple
2.96-3.06 mm0.117-0.120 inLight Blue
3.23-3.33 mm0.127-0.131 inOrange
3.50-3.60 mm0.138-0.142 inWhite
NOTE
After measuring clutch pack travel, determine if the measurement is within the specification. If the measurement is not within the specification, measure the thickness of the existing retaining ring, and then choose a thicker or thinner retaining ring that will bring the measurement within specification.

1-2-3-4 Clutch

Clutch Pack Travel Specification - 1.28-1.89 mm (0.050-0.074 in)
Retaining Ring ThicknessO.D. Color
MetricEnglish
NOTE: After measuring clutch pack travel, determine if the measurement is within the specification. If the measurement is not within the specification, measure the thickness of the existing retaining ring, and then choose a thicker or thinner retaining ring that will bring the measurement within specification.
1.60-1.70 mm0.063-0.067 inYellow
2.02-2.12 mm0.080-0.083 inNone
2.44-2.54 mm0.096-0.100 inPurple
NOTE
After measuring clutch pack travel, determine if the measurement is within the specification. If the measurement is not within the specification, measure the thickness of the existing retaining ring, and then choose a thicker or thinner retaining ring that will bring the measurement within specification.

4-5-6 Clutch

Clutch Pack Travel Specification - 1.30-2.07 mm (0.051-0.081 in)
Retaining Ring ThicknessO.D. Color
MetricEnglish
NOTE: After measuring clutch pack travel, determine if the measurement is within the specification. If the measurement is not within the specification, measure the thickness of the existing retaining ring, and then choose a thicker or thinner retaining ring that will bring the measurement within specification.
1.85-1.95 mm0.073-0.077 inYellow
2.26-2.36 mm0.089-0.093 inNone
2.67-2.77 mm0.105-0.109 inPurple
NOTE
After measuring clutch pack travel, determine if the measurement is within the specification. If the measurement is not within the specification, measure the thickness of the existing retaining ring, and then choose a thicker or thinner retaining ring that will bring the measurement within specification.

Low/Reverse Clutch

Clutch Backing Plate Retaining Ring Specifications (6L90)

Clutch Pack Travel Specification - 1.50-2.08 mm (0.059-0.082 in)
Retaining Ring ThicknessO.D. Color
MetricEnglish
NOTE: After measuring clutch pack travel, determine if the measurement is within the specification. If the measurement is not within the specification, measure the thickness of the existing retaining ring, and then choose a thicker or thinner retaining ring that will bring the measurement within specification.
1.61-1.71 mm0.063-0.067 inGray
1.88-1.98 mm0.074-0.078 inLight Green
2.15-2.25 mm0.085-0.089 inYellow
2.42-2.52 mm0.095-0.099 inNone
2.69-2.79 mm0.106-0.110 inPurple
NOTE
After measuring clutch pack travel, determine if the measurement is within the specification. If the measurement is not within the specification, measure the thickness of the existing retaining ring, and then choose a thicker or thinner retaining ring that will bring the measurement within specification.

3-5 Reverse Clutch

Clutch Pack Travel Specification - 1.79-2.25 mm (0.070-0.089 in)
Retaining Ring ThicknessO.D. Color
MetricEnglish
NOTE: After measuring clutch pack travel, determine if the measurement is within the specification. If the measurement is not within the specification, measure the thickness of the existing retaining ring, and then choose a thicker or thinner retaining ring that will bring the measurement within specification.
2.42-2.52 mm0.095-0.099 inNone
2.69-2.79 mm0.106-0.110 inPurple
2.96-3.06 mm0.117-0.120 inLight Blue
3.23-3.33 mm0.127-0.131 inOrange
3.50-3.60 mm0.138-0.142 inWhite
NOTE
After measuring clutch pack travel, determine if the measurement is within the specification. If the measurement is not within the specification, measure the thickness of the existing retaining ring, and then choose a thicker or thinner retaining ring that will bring the measurement within specification.

1-2-3-4 Clutch

Clutch Pack Travel Specification - 1.18-1.79 mm (0.059-0.082 in)
Retaining Ring ThicknessO.D. Color
MetricEnglish
NOTE: After measuring clutch pack travel, determine if the measurement is within the specification. If the measurement is not within the specification, measure the thickness of the existing retaining ring, and then choose a thicker or thinner retaining ring that will bring the measurement within specification.
1.60-1.70 mm0.063-0.067 inYellow
2.02-2.12 mm0.080-0.083 inNone
2.44-2.54 mm0.096-0.100 inPurple
NOTE
After measuring clutch pack travel, determine if the measurement is within the specification. If the measurement is not within the specification, measure the thickness of the existing retaining ring, and then choose a thicker or thinner retaining ring that will bring the measurement within specification.

4-5-6 Clutch

Clutch Pack Travel Specification - 1.56-2.22 mm (0.061-0.087 in)
Retaining Ring ThicknessO.D. Color
MetricEnglish
NOTE: After measuring clutch pack travel, determine if the measurement is within the specification. If the measurement is not within the specification, measure the thickness of the existing retaining ring, and then choose a thicker or thinner retaining ring that will bring the measurement within specification.
1.85-1.95 mm0.073-0.077 inYellow
2.26-2.36 mm0.089-0.093 inNone
2.67-2.77 mm0.105-0.109 inPurple
NOTE
After measuring clutch pack travel, determine if the measurement is within the specification. If the measurement is not within the specification, measure the thickness of the existing retaining ring, and then choose a thicker or thinner retaining ring that will bring the measurement within specification.

Low/Reverse Clutch

Clutch & Band Application

RangeParkReverseNeutralDrive
1st Braking1st2nd3rd4th5th6th
1-2-3-4 ClutchAppliedAppliedAppliedAppliedApplied
3-5 Reverse ClutchAppliedAppliedApplied
4-5-6 ClutchAppliedAppliedApplied
2-6 ClutchAppliedApplied
Low and Reverse ClutchApplied*AppliedApplied*Applied
Low Clutch SpragHoldingHolding
* = Applied with NO load

Range Reference Table

Shift Solenoid Valve State and Gear Ratio

GearShift SOL 1Shift SOL 21-2-3-4 CL PC SOL 5 N.L.2-6 CL PC SOL 4 N.L.3-5 REV CL PC SOL 2 N.H.LOW REV 4-5-6 CL PC SOL 3 N.H.6L45 6L50 Gear Ratio6L80 6L90 Gear Ratio
ParkONONOFFOFFOFFON
ReverseONOFFOFFOFFONON3.2003.064
NeutralONONOFFOFFOFFON
1st BrakingONONONOFFOFFON4.0654.027
1stOFFONONOFFOFFOFF4.0654.027
2ndOFFONONONOFFOFF2.3712.364
3rdOFFONONOFFONOFF1.5511.532
4thOFFONONOFFOFFON1.1571.152
5thOFFONOFFOFFONON0.8530.852
6thOFFONOFFONOFFON0.6740.667
For shift solenoids 1 and 2, "ON" = Solenoid Energized (Pressurized) "OFF" = Solenoid De-energized (No Pressure). For pressure control solenoids, "ON" = Pressurized, "OFF" = No Pressure

Transmission Fluid Pressure Switch Logic

GearTFP Switch States
TFP SW1*TFP SW3TFP SW4TFP SW5
ParkHighLowLowLow
ReverseLowLowLowLow
NeutralHighLowLowLow
Drive 1st - Engine BrakingHighHighLowLow
Drive 1stHighHighLowHigh
Drive 2ndHighLowLowHigh
Drive 3rdLowHighLowHigh
Drive 4thHighHighLowLow
Drive 5thLowHighHighLow
Drive 6thHighHighHighLow
Drive 6th (Possible additional gear state)HighLowHighLow
High = 12V (Switch Open or Pressurized) Low = 0V (Switch Closed or No Pressure) Note: All TFP switches are normally closed (NC) *TFP switch 2 does not exist

Transmission Fluid Pressure (TFP) Switch Logic

Transmission Internal Mode Switch Logic

Gear Selector PositionSignal ASignal BSignal CSignal P
ParkLOWHIHILOW
Park/ReverseLOWLOWHILOW
ReverseLOWLOWHIHI
Reverse/NeutralHILOWHIHI
NeutralHILOWHILOW
Neutral/Drive 6HILOWLOWLOW
Drive 6HILOWLOWHI
Drive 6/Drive 4LOWLOWLOWHI
Drive 4LOWLOWLOWLOW
Drive 4/Drive 3LOWHILOWLOW
Drive 3LOWHILOWHI
Drive 3/Drive 2HIHILOWHI
Drive 2HIHILOWLOW
OpenHIHIHIHI
InvalidHIHIHILOW
InvalidLOWHIHIHI
HI = Ignition voltage LOW = 0 volts

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