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Makes 🢒 Chevrolet 🢒 2000 🢒 Tracker - 4WD 🢒 Bulletins 🢒 High Transfer Case Shift Effort (Replace Sync. Hub/Sleeve Assm., Ring, Shaft)

High Transfer Case Shift Effort (Replace Sync. Hub/Sleeve Assm., Ring, Shaft)

Subject:High Transfer Case Shift Effort (Replace Synchronizer Hub/Sleeve Assembly, Synchronizer Blocking Ring and Shift Shaft)

Models:1999-2000 Chevrolet Tracker
with 4-Wheel Drive


Condition

Some customers may comment on a high transfer case shift effort when shifting from 2H to 4H with the vehicle in motion.

Cause

This condition may be caused by high friction and engagement load within the synchronizer.

Correction

Replace the synchronizer hub/sleeve assembly, synchronizer blocking ring and front drive shift shaft. Use the following service procedure and part numbers listed below.

Important: Improvements have been made to the above components which should reduce shift effort. The synchronizer inserts and spring have been eliminated to reduce friction.

Service Procedure
  1. Remove the transfer case assembly from the vehicle.

    2. Refer to the Transfer Case sub-section of the Service Manual.

  2. Remove the synchronizer hub/sleeve assembly, synchronizer blocking ring and front drive shift shaft.

    3. Refer to the Transfer Case -- Tracker sub-section of Driveline/Axle in the Unit Repair Manual.

    Perform steps 1-17, 31-34, 41, 46 and 52.

  3. Install the new synchronizer hub/sleeve assembly, synchronizer blocking ring and front drive shift shaft.

    4. Refer to the Transfer Case -- Tracker sub-section of Driveline/Axle in the Unit Repair Manual.

    Perform steps 1, 2, 7, 14, 24-31 and 40-70.

  4. Install the transfer case assembly into the vehicle.

    5. Refer to the Transfer Case sub-section of the Service Manual.

Parts Information

Part Number

Description

Qty

12346190 (U.S.)

10953477 (Canada)

Lubricant, 75W-85 GL-4 Synthetic

2

91176201

Ring, Transfer Case Driven Synchronizer Blocking

1

91176225

Hub, Transfer Case Driven Synchronizer

1

91176226

Sleeve, Transfer Case Driven Synchronizer

1

91176227

Shaft, Transfer Case Drive Shift

1

96059653

Seal, Transfer Case Input Shaft

1

96057742

Seal, Transfer Case Front Output Shaft

2

Parts are currently available from GMSPO.

Warranty Information

For vehicles repaired under warranty, use:

Labor Operation

Description

Labor Time

K4400

Transfer Case Assembly - R&R

Use published labor operation time

In Other Labor Hours, add 1.3 hrs for replacing the synchronizer hub/sleeve, synchronizer blocking ring and drive shift shaft. Authorization Required.