Chevrolet Silverado / GMC Sierra. Service manual — part 988

1. Install 2 M10 x 1.5 guide bolts (5) into the transmission case (4).

2. Install a new torque converter housing to case gasket (3) onto the transmission case.

3. Attach a sling to the converter housing (1).

4. Attach a hoist to the sling.

5. Align the converter housing (1) with the guide bolts (5).

6. Apply J 36850 or equivalent lubrication to the 3 seal rings on the rear of the oil pump cover

assembly. See Special Tools.

7. Lower the converter housing/oil pump cover assembly (1) over the turbine shaft (2) and

onto the transmission case (4).

8. Tap the converter housing until the converter housing seats on the transmission case.

9. Remove the sling.

10. Remove 2 guide bolts (5) from the transmission case.

personal injury and/or property damage:

Use caution when installing, removing, or moving the
converter housing/oil pump cover assembly.

Get help when lifting the converter housing/oil pump
cover assembly.

Assistance from a hoist or another person may be
required.

Make sure lifting equipment can properly support the
converter housing/oil pump cover assembly.

NOTE:

Transmission damage may occur if the torque converter
housing is forced into position. If tapping does not cause the
torque converter housing to drop into place, then one or more
of the following components may be misaligned:

Output sun gear

Output sun gear spacer

Seal ring

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

Fig. 495: Locating Transmission Case Bolts
Courtesy of GENERAL MOTORS CORP.

11. Install 18 bolts (1).

NOTE:

Refer to Torque Converter Housing/Low and Reverse Clutch
Housing Bolt Size Notice .

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

12. Install 1 bolt (2).

13. Install 1 bolt (3).

Tighten: Tighten bolts (1, 2, 3) to 56 N.m (42 lb ft).

NOTE:

Refer to Fastener Notice .

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

Fig. 496: Identifying Converter Housing Components
Courtesy of GENERAL MOTORS CORP.

NOTE:

Install the short-threaded end of the transmission external oil
filter adapter into the converter housing. If the long-threaded

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado