GM Service Manual Online
For 1990-2009 cars only

Gear Teeth Counts and Ratios

 

GEAR TEETH COUNT

1st Drive:

13

1st Driven:

44

2nd Drive:

25

2nd Driven:

44

3rd Drive:

39

3rd Driven:

46

4th Drive:

47

4th Driven:

42

5th Drive:

54

5th Driven:

38

Reverse Drive:

25

Reverse Idler:

21

1st & 2nd Gear Synchronizer Sleeve:

49

Output Shaft

20

Ring Gear:

89

Blocking Ring Clearances

MEASUREMENT

STANDARD

SERVICE LIMIT

 

METRIC

ENGLISH

METRIC

ENGLISH

1st and 2nd Gears

1.2-1.4 mm (min.)

0.047-0.055 in. (min.)

0.8 mm (min.)

0.032 in (min.)

3rd, 4th, and Reverse Gears

0.9-1.2 mm (min.)

0.035-0.047 in. (min.)

0.5 mm (min.)

0.020 in (min.)

5th Gear

0.7-1.1 mm (min.)

0.028-0.043 in. (min.)

0.5 mm (min.)

0.020 in. (min.)

Axial Play Specifications

MEASUREMENT

SPECIFICATION

 

METRIC

ENGLISH

Between 2nd and 3rd Drive Gears

0.05 mm-0.40 mm

0.002 in.-0.016 in.

Between 4th Drive Gear and Input Shaft Bearing

0.05 mm-0.40 mm

0.002 in.-0.016 in.

Between Reverse Gear and Reverse Gear Washer

0.10 mm-0.20 mm

0.004 in.-0.008 in.

Input Shaft Axial Play

0.09 mm-0.15 mm

0.004 in.-0.006 in.

Output Shaft Axial Play

This is a calculated value, it can change based upon age of case and output shaft bearing, refer to "Transaxle Assembly" in this service manual.