Correct Contact Pattern

2011 GMC Savana Special 4.8 ASECTION Correct Contact Pattern
WARNING: This page is about a different car, the 2011 GMC Savana and 2011 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Correct Gear Tooth Contact Pattern
GM569603Courtesy of GENERAL MOTORS CORP.

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.

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.