Transmission General Specifications. GMC Truck Sierra

For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 2008 🢒 Sierra - 2WD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - Allison 🢒 Transmission General Specifications

Table 1:	Transmission Weight
Table 2:	Transmission Gear Ratio
Table 3:	Torque Converter Clutch Pressure Control Solenoid (TCC PCS) Specifications
Table 4:	Shift Solenoid 1 (SS1), SS2, SS3, and Modulated Main Pressure (MAIN MOD) Solenoid Specifications
Table 5:	Wear Limits
Table 6:	Modulated Main Pressure Schedule Table _{(Transmissions with MAIN MOD Solenoid)}

Transmission Weight

Name	Allison
Transmission Weight Dry	150 kg (330 lb)
Transmission Weight Wet	161.1 kg (353.0 lb)

Transmission Gear Ratio

Name	Allison 1000 Series
1st Range Ratio	3.10:1
2nd Range Ratio	1.81:1
3rd Range Ratio	1.41:1
4th Range Ratio	1.00:1
5th Range Ratio	0.71:1
6th Range Ratio	0.61:1
Reverse Range Ratio	4.49:1

Torque Converter Clutch Pressure Control Solenoid (TCC PCS) Specifications

Sump Temperature		Resistance
Degrees C	Degrees F	Ohms
0	32	9.5
20	68	10.5
40	104	11.5

Shift Solenoid 1 (SS1), SS2, SS3, and Modulated Main Pressure (MAIN MOD) Solenoid Specifications

Sump Temperature		Resistance
Degrees C	Degrees F	Ohms
0	32	20.0
20	68	22.0
40	104	24.5

Wear Limits

Part Measured	Specification
Part Measured	Metric	English
Torque Converter Pump Hub Minimum OD	58.250 mm	2.2933 in
Torque Converter Pump Hub Minimum Distance Between Flats	51.816 mm	2.0400 in
Torque Converter Cover Pilot, Minimum OD	43.080 mm	1.6960 in
Stator Shaft, Maximum ID at Turbine Shaft Seal Ring Bore	45.450 mm	1.7894 in
Stator Shaft, Maximum Spline Wear	No visible wear	No visible wear
Stator Shaft Bushing, Maximum ID	33.850 mm	1.3326 in
Transmission Oil Pump Cover Assembly Thrust Washer Thickness	1.490 mm	0.0590 in
1-2-3-4, 4-5-6 Clutch Housing Bushing, Maximum ID	78.170 mm	3.0776 in
1-2-3-4, 4-5-6 Clutch Housing Rotating Seal Bore, Maximum ID	74.050 mm	2.9154 in
1-2-3-4 Clutch Fiber Plates Maximum Cone	0.255 mm	0.0100 in
1-2-3-4 Clutch Fiber Plates Minimum Thickness	2.375 mm	0.0935 in
1-2-3-4 Clutch Fiber Plates Minimum Oil Groove Depth	0.200 mm	0.0079 in
1-2-3-4 Clutch Steel Plate Maximum Cone	0.200 mm	0.0079 in
1-2-3-4 Clutch Steel Plate Minimum Thickness	2.135 mm	0.0841 in
1-2-3-4 Clutch Backing Plate Maximum Cone	0.000 mm	0.0000 in
4-5-6 Clutch Fiber Plates Maximum Cone	0.225 mm	0.0089 in
4-5-6 Clutch Fiber Plates Minimum Thickness	2.375 mm	0.0935 in
4-5-6 Clutch Fiber Plates Minimum Oil Groove Depth	0.200 mm	0.0079 in
4-5-6 Clutch Steel Plate Maximum Cone	0.240 mm	0.0094 in
4-5-6 Clutch Steel Plate Minimum Thickness	2.135 mm	0.0841 in
Turbine Shaft Bushing, Maximum ID	20.150 mm	0.7933 in
Turbine Shaft Thrust Washer	2.590 mm	0.102 in
3rd, 5th and Reverse/2-6 Clutch Fiber Plate Maximum Cone	0.225 mm	0.0089 in
3rd, 5th and Reverse/2-6 Clutch Fiber Plate Minimum Thickness	2.375 mm	0.0935 in
3rd, 5th and Reverse/2-6 Clutch Fiber Plate Minimum Oil Groove Depth	0.200 mm	0.0079 in
3rd, 5th and Reverse/2-6 Clutch Steel Plate Maximum Cone	0.400 mm	0.0157 in
3rd, 5th and Reverse/2-6 Clutch Steel Plate Minimum Thickness	2.440 mm	0.0961 in
3rd, 5th and Reverse/2-6 Clutch Spring Plate Maximum Cone	0.400 mm	0.0157 in
3rd, 5th and Reverse/2-6 Clutch Spring Plate Minimum Thickness	3.110 mm	0.1224 in
3rd, 5th and Reverse Clutch Backing Plate Maximum Cone	0.000 mm	0.0000 in
3rd, 5th and Reverse Clutch Backing Plate Minimum Thickness	15.325 mm	0.6033 in
Thrust Plate Inner Rim, Minimum Thickness	3.000 mm	0.1181 in
2-6 Clutch Backing Plate Maximum Cone	0.000 mm	0.0000 in
2-6 Clutch Backing Plate Minimum Thickness	15.400 mm	0.6063 in
Low and Reverse Clutch Fiber Plate Maximum Cone	0.225 mm	0.0089 in
Low and Reverse Clutch Fiber Plate Minimum Thickness	2.375 mm	0.0935 in
Low and Reverse Clutch Fiber Plate Minimum Oil Groove Depth	0.200 mm	0.0079 in
Low and Reverse Clutch Steel Plate Maximum Cone	0.295 mm	0.0116 in
Low and Reverse Clutch Backing Plate Maximum Cone	0.000 mm	0.0000 in
Low and Reverse Clutch Backing Plate Minimum Thickness	17.900 mm	0.704 in
Transmission Case Clutch Plate, Spline Wear (Notching)	1.150 mm	0.0450 in
Input Internal Ring Gear, Maximum Spline Wear (Notching)	0.130 mm	0.0051 in
Input Carrier Assembly Bushing, Maximum ID	50.690 mm	1.9957 in
Input Carrier Assembly Thrust Washers Thickness	1.490 mm	0.0590 in
Input Carrier Assembly Pinion Maximum End Play	1.010 mm	0.0400 in
Intermediate Internal Ring Gear, Maximum Spline Wear (Notching)	0.130 mm	0.0051 in
Intermediate Internal Ring Gear Thrust Washer Thickness	1.490 mm	0.0590 in
Intermediate Carrier Assembly Pinion Maximum End Play	1.010 mm	0.0400 in
Intermediate Carrier Bushing, Maximum ID	36.575 mm	1.4400 in
Output Carrier Internal Ring Gear, Maximum Spline Wear (Notching)	0.130 mm	0.0051 in
Output Carrier Assembly Pinion Maximum End Play	1.010 mm	0.0400 in
Main Shaft Pilot, Minimum OD (Turbine Shaft and Output Shaft)	19.987 mm	0.7869 in
Main Shaft Journal, Minimum OD (Intermediate Carrier Bushing)	36.405 mm	1.4333 in
Output Shaft Bushing (2WD and 4WD), Maximum ID	20.150 mm	0.7933 in
Output Shaft (2WD and 4WD), Minimum Bearing Surface OD	44.978 mm	1.7708 in
Park Pawl Gear Wear	0.000 mm	0.0000 in
Output Yoke, Output Seal Surface, Minimum OD	65.080 mm	2.5622 in

Modulated Main Pressure Schedule Table _{(Transmissions with MAIN MOD Solenoid)}

Condition	Main Pressure at 600 RPM	Main Pressure at 2100 RPM
Forward/Rev Converter w/MAIN MOD Solenoid Active	590-720 kPa (85-105 psi)	634-758 kPa (92-110 psi)
Forward Converter w/MAIN MOD Solenoid Inactive	700-138 kPa (101-200 psi)	1515-1795 kPa (220-260 psi)
*Forward Lock-up w/MAIN MOD Solenoid Active	N/A	510-627 kPa (74- 91 psi)
Forward Lock-up w/MAIN MOD Solenoid Inactive	N/A	1000-1170 kPa (145-170 psi)
Neutral/Park w/MAIN MOD Solenoid Active	590-720 kPa (85-05 psi)	N/A
Neutral/Park	800-1655 kPa (130-240 psi)	1515-1795 kPa (220-260 psi)
* Medium duty gasoline engines only.

Transmission Weight

Transmission Gear Ratio

Torque Converter Clutch Pressure Control Solenoid (TCC PCS) Specifications

Shift Solenoid 1 (SS1), SS2, SS3, and Modulated Main Pressure (MAIN MOD) Solenoid Specifications

Wear Limits

Modulated Main Pressure Schedule Table (Transmissions with MAIN MOD Solenoid)

Modulated Main Pressure Schedule Table _{(Transmissions with MAIN MOD Solenoid)}