Fastener Tightening Specifications
| Application | *Ref No. | Quantity | Size | Specification |
|---|
| Metric | English |
| Auxiliary Transmission Oil Cooler Quick Connect Fittings | | | | 25 N.m | 18 lb ft |
| Auxiliary Transmission Oil Cooler Brace to Skid Bar Bolt | | | | 25 N.m | 18 lb ft |
| Auxiliary Transmission Oil Cooler Bracket to Body Nuts | | | | 8 N.m | 71 lb in |
| Auxiliary Transmission Oil Cooler to Bracket Mounting Bolts | | | | 22 N.m | 16 lb ft |
| Case Extension to Case Assembly | 16 | 6 | M10x1.5x40 | 55 N.m | 41 lb ft |
| Control Solenoid Valve Assembly and Control Valve Lower Body Assembly to Control Valve Upper Body Assembly | 310 | 6 | M5x0.8x55 | 8 N.m | 71 lb in |
| Control Solenoid Valve Assembly and Control Valve Lower Body Assembly to Control Valve Upper Body Assembly | 309 | 10 | M5x0.8x45 | 8 N.m | 71 lb in |
| Control Solenoid Valve Heat Sink to Valve Body | 312 | 2 | M5x0.8x53 | 8 N.m | 71 lb in |
| Control Valve Upper Body Assembly to Control Valve Lower Body Assembly | 301 | 12 | M5x0.8x36 | 8 N.m | 71 lb in |
| Control (with Body and Valve) Valve Assembly to Case Assembly | 22 | 6 | M5x0.8x73 | 8 N.m | 71 lb in |
| Fluid Pan Assembly to Case Assembly (6L80) | 30 | 18 | M6x1.0x20 | 9 N.m | 80 lb in |
| Fluid Pan Assembly to Case Assembly (6L50) | 30 | 17 | M6x1.0x20 | 9 N.m | 80 lb in |
| Fluid Pump Cover Assembly to Torque Converter Housing | 231 | 13 | M6 1.0x40 | 11 N.m | 97 lb in |
| Input and Output Speed Sensor Assembly to Control Valve Upper Body Assembly | 302 | 2 | M6x1.0x20 | 12 N.m | 106 lb in |
| Line Pressure Test Hole Plug to Torque Converter Housing | 202 | 1 | 1/8-27 NPTF | 11 N.m | 97 lb in |
| Manual Shaft Detent Assembly to Valve Body | 23 | 1 | M6x1.0x14.5 | 12 N.m | 106 lb in |
| Prop Shaft Trans Flange to Output Shaft | 39 | 1 | M22x1.5x14 | 105 N.m | 77 lb ft |
| Shift Control Assembly to Body Nuts | | 4 | | 9 N.m | 80 lb in |
| Shift Control Knob Screw | | 1 | | 2 N.m | 18 lb in |
| Shift Control Linkage to Manual Shift Shaft Nut (AWD) | | 1 | | 20 N.m | 15 lb ft |
| Shift Control Linkage to Manual Shift Shaft Nut (RWD) | | 1 | | 15 N.m | 11 lb ft |
| Shift Control Linkage to Shift Control Assembly Nut | | 1 | | 9 N.m | 80 lb in |
| Torque Converter Housing Assembly to Case Assembly (6L50) | 3 | 8 | M8x1.25x50 | 31 N.m | 23 lb ft |
| Torque Converter Housing Assembly to Case Assembly (6L80) | 3 | 9 | M10x1.5x50 | 72 N.m | 53 lb ft |
| Torque Converter to Flywheel Bolts | | 3 | | 63 N.m | 46 lb ft |
| Trans Oil Level Check Plug to Fluid Pan Assembly | 31 | 1 | M12x1.75 | 25 N.m | 18 lb ft |
| Transmission Oil Cooler Pipe Clip to Oil Pan Nuts | | | | 10 N.m | 89 lb in |
| Transmission Oil Cooler Pipe Clip to Torque Tube Bolts | | | | 12 N.m | 106 lb in |
| Transmission Oil Cooler Pipes to Transmission Bolt | | | | 16 N.m | 12 lb ft |
| Transmission to Engine Block Bolts | | 10 | | 50 N.m | 37 lb ft |
| Transmission Support Assembly to Body Bolts | | 4 | | 60 N.m | 44 lb ft |
| Transmission Support Assembly to Transmission Bolts - RWD | | 2 | | 60 N.m | 44 lb ft |
| Transmission Support Assembly to Transmission Bolts - AWD | | 2 | | 110 N.m | 81 lb ft |
| *Reference number refers to the component callout number in Disassembled Views |
Transmission General Specifications
| Name | 6L50 | 6L80 |
|---|
| RPO Codes | MYB | MYC |
| Production Location | Strasbourg, France Ypsilanti, Michigan (USA) | Ypsilanti, Michigan (USA) |
| Transmission Drive | Rear Wheel Drive | Rear Wheel Drive |
| 1st Gear Ratio | 4.065 | 4.027 |
| 2nd Gear Ratio | 2.371 | 2.364 |
| 3rd Gear Ratio | 1.551 | 1.532 |
| 4th Gear Ratio | 1.157 | 1.152 |
| 5th Gear Ratio | 0.853 | 0.852 |
| 6th Gear Ratio | 0.674 | 0.667 |
| Reverse | 3.200 | 3.064 |
| Torque Converter Size - Diameter of Torque Converter Turbine | 245/258 mm | 258/300 mm |
| Pressure Taps | Line Pressure | Line Pressure |
| Transmission Fluid Type | Dexron VI | Dexron VI |
| Transmission Type: 6 | Six Forward Gears | Six Forward Gears |
| Transmission Type: L | Longitude Mount | Longitude Mount |
| Transmission Type: 50/80 | Product Series | Product Series |
| Position Quadrant | P, R, N, D, M | P, R, N, D, S (some models) |
| Case Material | Die Cast Aluminum | Die Cast Aluminum |
| Transmission Net Weight (Approximate) | 90 kg (198 lb) | 95.1 kg (209.7 lb) |
| Maximum Trailer Towing Capacity | Refer to applicable owner's manual | Refer to applicable owner's manual |
Adhesives, Fluids, Lubricants, and Sealers
| Application | Type of Material | GM Part Number |
|---|
| United States | Canada | Brazil |
| Front Prop Shaft Flange Nut | Adhesive | 89021297 | 10953488 | Refer to Owner's Manual and Electronic Parts Catalog |
Fluid Capacity Specifications
| Application | Specification |
|---|
| Metric | English |
| Pan Removal and Filter Replacement - Approximate Capacity (6L50/6L80) | 6.3 liters | 6.7 quarts |
| Overhaul - Approximate Capacity (6L50) | 9.3 liters | 9.8 quarts |
| Overhaul - Approximate Capacity (6L80) | 8.7 liters | 9.2 quarts |
| Complete Trans System - Capacity (6L50) | 10.8 liters | 11.4 quarts |
| Complete Trans System - Capacity (6L80) | 10.3 liters | 10.9 quarts |
Fluid Pump Selective Specifications
| Size Classification | Thickness (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 |
| 1 | 17.948-17.961 | 0.7066-0.7071 |
| 2 | 17.961-17.974 | 0.7071-0.7076 |
| 3 | 17.974-17.987 | 0.7076-0.7081 |
| Slide Selection |
| 1 | 17.948-17.961 | 0.7066-0.7071 |
| 2 | 17.961-17.974 | 0.7071-0.7076 |
| 3 | 17.974-17.987 | 0.7076-0.7081 |
| 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 (6L50)
| Clutch Pack Travel Specification - 1.20-1.74 mm (0.047-0.069 in) |
|---|
| Retaining Ring Thickness | O.D. Color |
| Metric | English |
| 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. |
| 2.24-2.34 mm | 0.088-0.092 in | Purple - Purple |
| 2.25-2.35 mm | 0.089-0.093 in | Light Green - Light Green |
| 2.47-2.57 mm | 0.097-0.101 in | Gray - Gray |
| 2.69-2.79 mm | 0.106-0.110 in | Yellow - Yellow |
| 2.91-3.01 mm | 0.115-0.119 in | Orange - Orange |
| 3.13-3.23 mm | 0.123-0.127 in | Light Blue - Light Blue |
| 3.35-3.45 mm | 0.132-0.136 in | White - White |
| 3.57-3.67 mm | 0.141-0.144 in | Yellow - Purple |
| 3.79-3.89 mm | 0.149-0.153 in | Light Blue - Purple |
| 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. |
| Clutch Pack Travel Specification - 1.50-1.98 mm (0.059-0.078 in) |
|---|
| Retaining Ring Thickness | O.D. Color |
| Metric | English |
| 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. |
| 2.25-2.35 mm | 0.089-0.093 in | Light Green - Light Green |
| 2.47-2.57 mm | 0.097-0.101 in | Gray - Gray |
| 2.69-2.79 mm | 0.106-0.110 in | Yellow - Yellow |
| 2.91-3.01 mm | 0.115-0.119 in | Orange - Orange |
| 3.13-3.23 mm | 0.123-0.127 in | Light Blue - Light Blue |
| 3.35-3.45 mm | 0.132-0.136 in | White - White |
| 3.57-3.67 mm | 0.141-0.144 in | Yellow - Purple |
| 3.79-3.89 mm | 0.149-0.153 in | Light Blue - Purple |
| 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. |
| Clutch Pack Travel Specification - 1.17-1.76 mm (0.046-0.069 in) |
|---|
| Retaining Ring Thickness | O.D. Color |
| Metric | English |
| 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. |
| 2.24-2.34 mm | 0.088-0.092 in | Purple - Purple |
| 2.52-2.62 mm | 0.099-0.103 in | Light Green - Light Green |
| 2.80-2.90 mm | 0.110-0.114 in | Gray - Gray |
| 3.08-3.18 mm | 0.121-0.125 in | Yellow - Yellow |
| 3.36-3.46 mm | 0.132-0.136 in | Orange - Orange |
| 3.64-3.74 mm | 0.143-0.147 in | Light Blue - Light Blue |
| 3.92-4.02 mm | 0.154-0.158 in | White - White |
| 4.20-4.30 mm | 0.165-0.169 in | Yellow - Purple |
| 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. |
| Clutch Pack Travel Specification - 1.20-1.96 mm (0.047-0.077 in) |
|---|
| Retaining Ring Thickness | O.D. Color |
| Metric | English |
| 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. |
| 1.64-1.74 mm | 0.065-0.069 in | Orange |
| 1.92-2.02 mm | 0.076-0.080 in | Yellow Stripe |
| 2.20-2.30 mm | 0.087-0.091 in | Light Blue Stripe |
| 2.48-2.58 mm | 0.098-0.102 in | Purple Stripe |
| 2.76-2.86 mm | 0.109-0.113 in | Green |
| 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. |
| Clutch Pack Travel Specification - 1.65-2.33 mm (0.065-0.092 in) |
|---|
| Retaining Ring Thickness | O.D. Color |
| Metric | English |
| 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. |
| 1.98-2.08 mm | 0.078-0.082 in | Orange |
| 2.28-2.38 mm | 0.090-0.094 in | Yellow Stripe |
| 2.58-2.68 mm | 0.102-0.106 in | Light Blue Stripe |
| 2.88-2.98 mm | 0.113-0.117 in | Purple Stripe |
| 3.18-3.28 mm | 0.125-0.129 in | Green |
| 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. |
Clutch Backing Plate Retaining Ring Specifications (6L80)
| Clutch Pack Travel Specification - 1.21-1.79 mm (0.048-0.070 in) |
|---|
| Retaining Ring Thickness | O.D. Color |
| Metric | English |
| 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 mm | 0.063-0.067 in | Gray |
| 1.88-1.98 mm | 0.074-0.078 in | Light Green |
| 2.15-2.25 mm | 0.085-0.089 in | Yellow |
| 2.42-2.52 mm | 0.095-0.099 in | None |
| 2.69-2.79 mm | 0.106-0.110 in | Purple |
| 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. |
| Clutch Pack Travel Specification - 1.53-1.99 mm (0.060-0.078 in) |
|---|
| Retaining Ring Thickness | O.D. Color |
| Metric | English |
| 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 mm | 0.095-0.099 in | None |
| 2.69-2.79 mm | 0.106-0.110 in | Purple |
| 2.96-3.06 mm | 0.117-0.120 in | Light Blue |
| 3.23-3.33 mm | 0.127-0.131 in | Orange |
| 3.50-3.60 mm | 0.138-0.142 in | White |
| 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. |
| Clutch Pack Travel Specification - 1.28-1.89 mm (0.050-0.074 in) |
|---|
| Retaining Ring Thickness | O.D. Color |
| Metric | English |
| 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 mm | 0.063-0.067 in | Yellow |
| 2.02-2.12 mm | 0.080-0.083 in | None |
| 2.44-2.54 mm | 0.096-0.100 in | Purple |
| 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. |
| Clutch Pack Travel Specification - 1.30-2.07 mm (0.051-0.081 in) |
|---|
| Retaining Ring Thickness | O.D. Color |
| Metric | English |
| 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 mm | 0.073-0.077 in | Yellow |
| 2.26-2.36 mm | 0.089-0.093 in | None |
| 2.67-2.77 mm | 0.105-0.109 in | Purple |
| 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. |
Clutch & Band Application
| Range | Park | Reverse | Neutral | Drive |
|---|
| 1st Braking | 1st | 2nd | 3rd | 4th | 5th | 6th |
| 1-2-3-4 Clutch | | | | Applied | Applied | Applied | Applied | Applied | | |
| 3-5 Reverse Clutch | | Applied | | | | | Applied | | Applied | |
| 4-5-6 Clutch | | | | | | | | Applied | Applied | Applied |
| 2-6 Clutch | | | | | | Applied | | | | Applied |
| Low and Reverse Clutch | Applied* | Applied | Applied* | Applied | | | | | | |
| Low Clutch Sprag | | | | Holding | Holding | | | | | |
| * = Applied with NO load |
Shift Solenoid Valve State and Gear Ratio
| Gear | Shift SOL 1 | Shift SOL 2 | 1-2-3-4 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 Ratio | 6L80 6L90 Gear Ratio |
|---|
| Park | ON | ON | OFF | OFF | OFF | ON | | |
| Reverse | ON | OFF | OFF | OFF | ON | ON | 3.200 | 3.064 |
| Neutral | ON | ON | OFF | OFF | OFF | ON | | |
| 1st Braking | ON | ON | ON | OFF | OFF | ON | 4.065 | 4.027 |
| 1st | OFF | ON | ON | OFF | OFF | OFF | 4.065 | 4.027 |
| 2nd | OFF | ON | ON | ON | OFF | OFF | 2.371 | 2.364 |
| 3rd | OFF | ON | ON | OFF | ON | OFF | 1.551 | 1.532 |
| 4th | OFF | ON | ON | OFF | OFF | ON | 1.157 | 1.152 |
| 5th | OFF | ON | OFF | OFF | ON | ON | 0.853 | 0.852 |
| 6th | OFF | ON | OFF | ON | OFF | ON | 0.674 | 0.667 |
| 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
| Gear | TFP Switch States |
|---|
| TFP SW1 | *TFP SW3 | TFP SW4 | TFP SW5 |
| Park | High | Low | Low | Low |
| Reverse | Low | Low | Low | Low |
| Neutral | High | Low | Low | Low |
| Drive 1st - Engine Braking | High | High | Low | Low |
| Drive 1st | High | High | Low | High |
| Drive 2nd | High | Low | Low | High |
| Drive 3rd | Low | High | Low | High |
| Drive 4th | High | High | Low | Low |
| Drive 5th | Low | High | High | Low |
| Drive 6th | High | High | High | Low |
| Drive 6th (Possible additional gear state) | High | Low | High | Low |
| 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 Position | Signal A | Signal B | Signal C | Signal P |
|---|
| Park | LOW | HI | HI | LOW |
| Park/Reverse | LOW | LOW | HI | LOW |
| Reverse | LOW | LOW | HI | HI |
| Reverse/Neutral | HI | LOW | HI | HI |
| Neutral | HI | LOW | HI | LOW |
| Neutral/Drive 6 | HI | LOW | LOW | LOW |
| Drive 6 | HI | LOW | LOW | HI |
| Drive 6/Drive 4 | LOW | LOW | LOW | HI |
| Drive 4 | LOW | LOW | LOW | LOW |
| Drive 4/Drive 3 | LOW | HI | LOW | LOW |
| Drive 3 | LOW | HI | LOW | HI |
| Drive 3/Drive 2 | HI | HI | LOW | HI |
| Drive 2 | HI | HI | LOW | LOW |
| Open | HI | HI | HI | HI |
| Invalid | HI | HI | HI | LOW |
| Invalid | LOW | HI | HI | HI |
| HI = Ignition voltage LOW = 0 volts |
