Rear Unit End Play Check

WARNING: This page is about a different car, the 2007 GMC Yukon XL and 2007 Chevrolet Suburban. However, it is still accessible from the selected car via links, so may be relevant.

Tools Required

J 8001 Dial Indicator Set
J 25025-B Dial Indicator Post and Guide Pin Set

Fig 1: Checking Rear Unit End Play With J 8001-3

Courtesy of GENERAL MOTORS CORP.

Assemble the J 25025-B by attaching the threaded rod and the dial indicator holder to one of the case extension bolt holes on the transmission case assembly (7).
Push in the output shaft assembly (671) to remove any slack.
Assemble the J 8001-3 onto the dial indicator holder. Index the J 8001-3 to the end of the output shaft (671).
Set the J 8001-3 to 0.
Move the output shaft (671) in and out, noting the amount of end play. The correct end play is between 0.127-0.508 mm (0.005-0.020 in).

IMPORTANT: During reassembly, the rear unit end play check must be repeated in order to verify the accuracy of the selective washer.

Record this measurement for future reference.
Remove the tools.

Tools Required

J 8001 Dial Indicator Set
J 25025-B Dial Indicator Post and Guide Pin Set

Fig 1: Checking Rear Unit End Play With J 8001-3

Courtesy of GENERAL MOTORS CORP.

Assemble the J 25025-B by attaching the threaded rod and the dial indicator holder to one of the case extension bolt holes on the transmission case (7).
Push the output shaft assembly (671) in to remove any slack.
Install the J 8001-3 on the dial indicator holder. Index the J 8001-3 to the end of the output shaft (671).
Set the J 8001-3 to 0.
Move the output shaft (671) in and out, noting the amount of end play.
End Play Specification: The correct end play is 0.127-0.508 mm (0.005-0.020 in).

If the end play is not correct, change the output shaft selective thrust washer (674). Refer to the Output Shaft Selective Thrust Washer Specifications .
Remove the tools.