GM Service Manual Online
For 1990-2009 cars only

Transmission Usage

Transmission Model

8AHW

Vehicle Series

W

Engine Displacement

3.1L

Engine RPO Code

L82

Engine VIN Code

M

Overall Axle Ratio

3.29

Final Drive Ratio

3.29

Drive/Driven Sprocket Teeth

35/35

VSS Rotor Teeth

30

Final Drive Assembly

STD

Output Shaft

STD

Torque Converter K-factor

180

Converter Clutch

ECCC

Case Side Cover Pan

SSC

SSC Mount Bolt Pattern

4 BOLT

Transmission Vent Assembly

CAP

Temperature Sensor

391

  • FP = Fine Pitch
  • HD = Heavy Duty
  • N/A = Not Available
  • SSC = Case Aluminum Structural Side Cover Pan
  • STD = Standard
  • STEEL = Stamped Steel Side Cover Pan
  • VSS = Vehicle Speed Sensor
  • K-factor = Torque converter numeric rating (combines stall speed and torque multiplication ratings)

This chart does not identify all unique build items and this chart may be subject to change.

Transmission Model

8AHW

8CUW

8YAW

8BSW

Vehicle Series

W

N

U

N

Engine Displacement

3.1L

2.4L

3.4L

3.1L

Engine RPO Code

L82

LD9

LA1

L82

Engine VIN Code

M

T

E

M

Overall Axle Ratio

3.29

2.42

3.29

2.93

Final Drive Ratio

3.29

3.05

3.29

3.29

Drive/Driven Sprocket Teeth

35/35

33/37

35/35

37/33

VSS Rotor Teeth

30

30

30

30

Final Drive Assembly

STD

FP

FP

FP

Output Shaft

STD

STD

STD

STD

Torque Converter K-factor

180

203

163

140

Converter Clutch

TCC

TCC

TCC

TCC

Case Side Cover Pan

SSC

SSC

STEEL

SSC

SSC Mount Bolt Pattern

4 BOLT

6 BOLT

4 BOLT

6 BOLT

Transmission Vent Assembly

CAP

TUBE

CAP

TUBE

Temperature Sensor

391

N/A

391

391

1-2 Accumulator Valve (Primary)

INVERT

STD

STD

STD

1-2 Accumulator Piston

136C

136A

136A

136A

1-2 Accumulator Spring(s)

139A,B

139A

139A

139A

2-3 Accumulator Piston

136A

136A

136A

136A

2-3 Accumulator Spring(s)

138A,B

138A,B

138A,B

138A,B

3-4 Accumulator Spring(s)

423,4

423,4

423,4

423,4

Notes:

  • FP = Fine Pitch
  • HD = Heavy Duty
  • N/A = Not Available
  • SSC = Case Aluminum Structural Side Cover Pan
  • STD = Standard
  • STEEL = Stamped Steel Side Cover Pan
  • VSS = Vehicle Speed Sensor
  • K-factor = Torque converter numeric rating (combines stall speed and torque multiplication ratings)

This chart does not identify all unique build items and this chart may be subject to change.