GM Service Manual Online
For 1990-2009 cars only

Component

Metric

English

Accumulator Pistons and Springs

  • Direct Clutch Accumulator Piston Outer Diameter

31.80-31.85

1.252-1.254

  • Direct Clutch Accumulator Piston Upper Spring Free Length

42.35

1.667

  • Forward Clutch Accumulator Piston Lower Spring Free Length

29.50

1.161

  • Forward Clutch Accumulator Piston Outer Diameter

31.80-31.85

1.252-1.254

  • Forward Clutch Accumulator Piston Upper Spring Free Length

57.18

2.251

  • Second Brake Accumulator Piston Lower Spring Free Length

35.13

1.383

  • Second Brake Accumulator Piston Outer Diameter

34.80-34.85

1.370-1.372

  • Second Brake Accumulator Piston Upper Spring Free Length

55.18

2.172

Front Upper Valve Body Springs

  • Cut Back Valve Spring Coil Outer Diameter

6.85

0.269

  • Cut Back Valve Spring Free Length

23.00

0.905

  • Secondary Regulator Valve Spring Coil Outer Diameter

17.43

0.681

  • Secondary Regulator Valve Spring Free Length

71.23

2.804

  • Secondary Valve Spring Coil Outer Diameter

8.58

0.337

  • Secondary Valve Spring Free Length

19.24

0.757

  • Throttle Valve Primary Spring Coil Outer Diameter

10.90

0.429

  • Throttle Valve Primary Spring Free Length

39.55

1.557

Lower Valve Body Springs

  • Ball Valve Spring Coil Outer Diameter

11.11

0.437

  • Ball Valve Spring Free Length

32.14

1.265

  • Bypass Valve Spring Coil Outer Diameter

13.82

0.554

  • Bypass Valve Spring Free Length

33.32

1.312

  • Inter Coast Modulator Valve Spring Coil Outer Diameter

10.00

0.394

  • Inter Coast Modulator Valve Spring Free Length

35.43

1.395

  • Low Coast Modulator Valve Spring Coil Outer Diameter

10.00

0.394

  • Low Coast Modulator Valve Spring Free Length

42.35

1.667

  • Pressure Relief Valve Spring Free Length

38.14

0.501

  • Pressure Relief Valve Spring Coil Outer Diameter

13.14

0.517

  • Primary Regulator Valve Spring Coil Outer Diameter

17.20

0.677

  • Primary Regulator Valve Spring Free Length

56.30

2.216

  • TCC Lock-Up Control Valve Spring Coil Outer Diameter

11.30

0.445

  • TCC Lock-Up Control Valve Spring Free Length

34.60

1.362

  • Valve Damping Spring Coil Outer Diameter

4.95

0.195

  • Valve Damping Spring Free Length

20.00

0.787

Rear Upper Valve Body Springs

  • Reverse Brake Sequence Valve Spring Coil Outer Diameter

9.20

0.362

  • Reverse Brake Sequence Valve Spring Free Length

37.55

1.148

  • 1-2 Shift Valve Coil Spring Outer Diameter

8.90

0.350

  • 1-2 Shift Valve Spring Free Length

29.15

1.147

  • 2-3 Shift Valve Spring Coil Outer Diameter

8.90

0.350

  • 2-3 Shift Valve Spring Free Length

29.15

1.147

  • 3-4 Shift Valve Spring Coil Outer Diameter

8.90

0.350

  • 3-4 Shift Valve Spring Free Length

29.15

1.147

Transmissions

  • B1 Brake Piston Stroke

0.63-1.73

0.025-0.068

  • B2 Brake Piston Stroke

1.01-2.25

0.040-0.088

  • Direct Clutch Piston Return Spring Free Length

15.13

0.594

  • Direct Clutch Piston Stroke

0.19-1.75

0.008-0.068

  • Forward Clutch Piston Return Spring Free Length

15.10

0.595

  • Forward Clutch Piston Stroke

1.40-2.24

0.056-0.880

  • Oil Pump Body-to-Driven Gear Clearance

0.07-0.15

0.0028-0.0059

  • Oil Pump Drive Gear and Driven Gear Side Clearance

0.02-0.05

0.0008-0.0019

  • Oil Pump Drive Gear Tip Clearance

0.11-0.14

0.0044-0.0055

  • Output Shaft End Play

0.30-0.90

0.012-0.035

  • Overdrive (Case Side) Clutch Piston Return Springs Free Length

15.10

0.594

  • Overdrive (Case Side) Snap Ring-to-Brake Flange Clearance

0.35-1.91

0.014-0.075

  • Overdrive (Planetary Gear Side) Clearance

1.47-2.28

0.058-0.089