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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1963 (Automatic Transmission - 2MT70 - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis) >> Off-Vehicle Repair Instructions >> Front Differential Drive Pinion Gear Bearing Thrust Washer and Front Differential Bearing Washer Measurement >> Differential Shim Selection

Differential Shim Selection

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Differential Shim Selection
GM2047419Courtesy of GENERAL MOTORS CORP.
Differential Shim Selection

Callout Component Name
1 Front Differential Bearing Washer

Procedure

  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

Procedure

  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 Dampener and Differential (w/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 Drive Pinion Gear Bearing Cup Removal - Torque Dampener Side  and Front Differential Drive Pinion Gear Roller Bearing 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 .