Rotational Torque Measurement Procedure (FWD)

Tools Required: 

DT-47687  Rotational Torque Adapter. See Special Tools .

Fig 1: View Of Front Differential Assembly
Courtesy of GENERAL MOTORS CORP.
1. Rotate the transmission assembly so that the torque converter housing side is facing up.
2. Install the front differential assembly (13) into the empty transmission case.
Fig 2: Locating Torque Converter Housing Bolts
Courtesy of GENERAL MOTORS CORP.
3. Install the torque converter housing assembly (10) to the transmission case assembly.
4. Install 10 M8 x 1.25 x 30 mm bolts (1) and hand tighten.
5. Install 1 M8 x 1.25 x 30 mm Torx 40 bolts (2) and hand tighten.
Fig 3: Installing Torque Converter Housing Bolts
Courtesy of GENERAL MOTORS CORP.
NOTE: Refer to Fastener Notice in Cautions and Notices.
6. Tighten the torque converter housing bolts in sequence.

   Tighten:  Tighten the bolts to 23.5-35.3 N.m (17.33-26.00 lb ft).

Fig 4: Measuring The Rotational Torque Required To Slowly Rotate The Front Differential Assembly Using J 46318
Courtesy of GENERAL MOTORS CORP.
IMPORTANT: When installing DT-47687  , make sure that the tool is properly inserted into the front differential assembly. See Special Tools .
7. Insert DT-47687  into the axle shaft opening of the differential and rotate DT-47687  until it engages with the differential pinion shaft (645). See Special Tools .
8. Using a torque wrench, measure the rotational torque required to slowly rotate the front differential assembly and note the readings. Refer to Front Differential Gear Assembly, Unloaded Rotating Torque in Transmission Clearance Specifications .

   Rotational Torque Specification:  Specification should be within 0.70-1.20 N.m (6-11 lb in).

9. Compare this measurement with the specification in Transmission Clearance Specifications . If the obtained measurement is within specifications, the differential shim replacement is not necessary.

   If obtained measurement is not within the listed specifications, the front differential bearing race shim must be replaced.

10. Remove DT-47687  from the front differential assembly. See Special Tools .
11. Remove the torque converter housing assembly and the front differential assembly from the transmission case.