GM Service Manual Online
For 1990-2009 cars only
Table 1: Front Differential Carrier and Front Differential Drive Pinion with Transfer Gear Installation
Table 2: Differential Thrust Washer Gage Installation
Table 3: Torque Sequence
Table 4: Differential Shim Selection

Front Differential Carrier and Front Differential Drive Pinion with Transfer Gear Installation


Object Number: 2187452  Size: MF

Front Differential Carrier and Front Differential Drive Pinion with Transfer Gear Installation

Callout

Component Name

1

Front Differential Bearing Spacer

2

Front Drive Pinion Gear Shaft Thrust Bearing Assembly (LHS)

3

Front Differential Drive Pinion (w/Transfer Gear) Gear Assembly

4

Front Differential Drive Pinion Gear Bearing Thrust Washer (RHS)

5

Front Drive Pinion Gear Shaft Thrust Bearing Assembly (RHS)

6

Front Differential Carrier Assembly (FWD)

7

Torque Dampener Housing Outer Seal

Differential Thrust Washer Gage Installation


Object Number: 2047343  Size: MF

Differential Thrust Washer Gage Installation

Callout

Component Name

1

Front Differential Drive Pinion Gear Bearing Cup

Tip
After placing the bearing cup on the gear, place DT-47800-2 which is part of DT-47800, onto the bearing cup.

Special Tools

    • DT-47800 Thrust Washer Selection Gage Kit
    • DT-47800-10 Thrust Washer Selection Bolts, Spacer and Shims

For equivalent regional tools, refer to Special Tools.

2

Front Differential Carrier Bearing Cup

Tip
After placing the bearing cup on the gear, place DT-47800-2 which is part of DT-47800, onto the bearing cup.

Special Tool

DT-47800 Thrust Washer Selection Gage Kit

For equivalent regional tools, refer to Special Tools.

3

Torque Converter and Support and A/Trans Fluid Pump Housing Assembly

Tip

    • Install 2 DT-47800-10, into a case threaded hole at approximately 180 degrees apart.
    • Some alignment of DT-47800-1 and 2 which is part of DT-47800, may be required while lowering the housing onto the case.
    • Install DT-47800-3 which is part of DT-47800, spacer over DT-47800-6.

Special Tools

    • DT-47800 Thrust Washer Selection Gage Kit
    • DT-47800-10 Thrust Washer Selection Bolts, Spacer and Shims

For equivalent regional tools, refer to Special Tools.

Torque Sequence


Object Number: 2047344  Size: MF

Torque Sequence

Callout

Component Name

1

Spacer Bolts M8 x 127 (Qty: 8)

Caution: Refer to Fastener Caution in the Preface section.

Tip

  1. Install the remaining spacers evenly at every other bolt hole.
  2. Remove the DT-47800-10, guide pins and install spacer bolts in all bolt holes at spacer locations.
  3. Tighten the bolts in sequence shown.

Tighten
30 N·m (22 lb ft)

Special Tools

    • DT-47800 Thrust Washer Selection Gage Kit
    • DT-47800-10 Thrust Washer Selection Bolts, Spacer and Shims

For equivalent regional tools, refer to Special Tools.

2

Front Differential Carrier Assembly

Caution: If the bearings are not properly seated into the bearing cups, the washer selection will be inaccurate and the bearing pre-load will be set too low. Low bearing pre-load will cause premature failure of the front differential drive pinion gear.

Tip
Differential rotating tool DT-47793 can be used to rotate the differential from the case side.

Special Tools

DT-47793 Differential Rotating Tool

For equivalent regional tools, refer to Special Tools.

Differential Shim Selection


Object Number: 2047419  Size: MF

Differential Shim Selection

Callout

Component Name

1

Front Differential Bearing Washer

Tip

  1. Place DT-47800-7 in the gap in DT-47800-2 which are both part of DT-47800, to determine the proper thrust washer. Choose the correct thrust washer. Refer to Taper Bearing Preload Selective Specifications.
  2. Continue trying different sizes of DT-47800-7 which is part of DT-47800, until the gage will no longer fit into the gap. The correct thrust washer size is equal to the largest blade gage that fits into the gap.
  3. Match the sizer of the correct DT-47800-7 blade which is part of DT-47800, to the color code in the thrust washer specification chart. The washer color coding is on the outside diameter of the washer.
  4. The gap in DT-47800-2 which is part of DT-47800, may not be even. Hold the top of the gage and rotate the bottom of the gage to even out the gap. Take two gap measurements 180 degrees apart. Average the two measurements and select the thrust washer that is closest to the average.
  5. The washer color coding is on the outside diameter of the washer.

Special Tools

DT-47800 Thrust Washer Selective Gage Kit

For equivalent regional tools, refer to Special Tools.

2

Front Differential Drive Pinion Gear Bearing Thrust Washer

Tip

  1. Place DT-47800-7 in the gap in DT-47800-1 which are both part of DT-47800, to determine the proper thrust washer. Choose the correct thrust washer. Refer to Taper Bearing Preload Selective Specifications.
  2. Continue trying different sizes of DT-47800-7 which is part of DT-47800, until the gage will no longer fit into the gap. The correct thrust washer size is equal to the largest blade gage that fits into the gap.
  3. Match the sizer of the correct DT-47800-7 blade which is part of DT-47800, to the color code in the thrust washer specification chart. The washer color coding is on the outside diameter of the washer.
  4. The gap in DT-47800-1 which is part of DT-47800, may not be even. Hold the top of the gage and rotate the bottom of the gage to even out the gap. Take two gap measurements 180 degrees apart. Average the two measurements and select the thrust washer that is closest to the average.
  5. The washer color coding is on the outside diameter of the washer.

Special Tools

DT-47800 Thrust Washer Selection Gage Kit

For equivalent regional tools, refer to Special Tools.

3

Torque Converter and Support and A/Trans Fluid Pump Housing Assembly

Procedure

  1. Remove the DT-47800-3 which is part of DT-47800, bolts and spacers.
  2. Remove the torque dampener housing.
  3. Remove the DT-47800-1 and DT-47800-2 which are both part of DT-47800.
  4. Remove the torque dampener housing seal.
  5. Remove the pinion gear and differential bearing cups.
  6. Install the bearing cups and thrust washers into the torque dampener housing per the replacement procedures. Refer to Front Differential Carrier Bearing Cup and Washer Replacement - Torque Converter Housing Side and Front Differential Drive Pinion Gear Bearing Cup and Lubricant Dam Replacement.

Tip
DT-47800-1 and DT-47800-2 which are both part of DT-47800, may stick in the torque dampener housing. Be careful not to drop the gages.

Special Tool

DT-47800 Thrust Washer Selection Gage Kit

For equivalent regional tools, refer to Special Tools.