Correct Contact Pattern

Fig 1: Identifying Correct Gear Tooth Contact Pattern

Courtesy of GENERAL MOTORS COMPANY

Condition 

The backlash and pinion depth is correct.

Correction 

None required.

Service Hints 

Loose bearing on the drive pinion or in the differential case may cause patterns that vary. If the contact pattern varies, inspect the following preload settings:

• Total assembly
• Differential case
• Drive pinion

If these settings are correct, inspect for damage or incorrectly assembled parts.