Backlash & Final Assembly
- Install a dial indicator (with indicator stem installed) at heel end of a tooth, in line with gear rotation and perpendicular to the tooth angle. With pinion stationary, measure ring gear backlash in at least 4 locations around ring gear. Backlash at each point should be the same, within .002" (.05 mm). Refer to AXLE ASSEMBLY SPECIFICATIONS table.
- Adjust to specification by moving adjusting nuts in or out as necessary. If one adjusting nut is loosened, other nut must be tightened an equal amount to maintain side bearing preload.
- With backlash adjustment complete, install adjusting nut lock into slots in nuts. Install nut lock bolt and tighten to specifications. Tighten bearing cap bolts to specifications. See TORQUE SPECIFICATIONS table. Perform gear tooth contact pattern check. See GEAR TOOTH CONTACT PATTERNS
article. Install drive axles. Refer to the AXLE SHAFT . Install axle housing cover and lubricant.
Courtesy of GENERAL MOTORS CORP.