GM Service Manual Online
For 1990-2009 cars only
Table 1: Gear Axial Clearance
Table 2: Gear Radial Clearance
Table 3: Output Shaft
Table 4: Output Shaft Bearing Journals - Minimum Diameter
Table 5: Countershaft Bearing Journals - Minimum Diameter
Table 6: Synchronizer Blocker Ring to Gear - Minimum Clearance
Table 7: Synchronizer Sleeve to Shift Fork - Maximum Clearance

Gear Axial Clearance

Application

Standard Clearance Metric

Maximum Clearance Metric

Standard Clearance English

Maximum Clearance English

1st Gear

0.20-0.45 mm

0.50 mm

0.0079-0.0177 in

0.0197 in

2nd Gear

0.10-0.25 mm

0.30 mm

0.0039-0.00098 in

0.0118 in

3rd Gear

0.10-0.25 mm

0.30 mm

0.0039-0.00098 in

0.0118 in

5th Countershaft Gear

0.10-0.35 mm

0.40 mm

0.0039-0.0138 in

0.0157 in

Gear Radial Clearance

Application

Standard Clearance Metric

Maximum Clearance Metric

Standard Clearance English

Maximum Clearance English

1st Gear

0.020-0.073 mm

0.160 mm

0.0008-0.0029 in

0.0063 in

2nd Gear

0.015-0.068 mm

0.160 mm

0.0006-0.0027 in

0.0063 in

3rd Gear

0.015-0.068 mm

0.160 mm

0.0006-0.0027 in

0.0063 in

5th Countershaft Gear

0.015-0.068 mm

0.160 mm

0.0006-0.0027 in

0.0063 in

Reverse Idler Gear

0.040-0.082 mm

0.130 mm

0.0016-0.0032 in

0.0051 in

Output Shaft

Application

Specification

Metric

English

Runout - Maximum

0.06 mm

0.0024 in

Flange Thickness - Minimum

4.70 mm

0.1859 in

Output Shaft Bearing Journals - Minimum Diameter

Application

Specification

Metric

English

1st Gear

38.860 mm

1.5299 in

2nd Gear

46.860 mm

1.8449 in

3rd Gear

37.860 mm

1.4905 in

Countershaft Bearing Journals - Minimum Diameter

Application

Specification

Metric

English

5th Countershaft Gear Bearing

29.86 mm

1.1756 in

Synchronizer Blocker Ring to Gear - Minimum Clearance

Application

Specification

Metric

English

1st Gear

0.8 mm

0.031 in

2nd Gear

0.8 mm

0.031 in

3rd Gear

0.8 mm

0.031 in

4th Gear

0.8 mm

0.031 in

5th Gear

0.8 mm

0.031 in

Synchronizer Sleeve to Shift Fork - Maximum Clearance

Application

Specification

Metric

English

1st/2nd Gear

1.0 mm

0.039 in

3rd/4th Gear

1.0 mm

0.039 in

5th Gear

1.0 mm

0.039 in

Reverse Idler Gear

0.50 mm

0.0197 in