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Home >> Pontiac >> 2002 >> Aztek FWD >> Repair and Diagnosis >> Transmission >> Transfer Case - Diagnostic Information & Procedures >> Repair Instructions >> Speed Sensor Replacement >> Installation Procedure
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Installation Procedure

  1. Raise and support the vehicle.
  2. Disconnect the electrical connector from the speed sensor.
  3. Remove the speed sensor/vent hose bolt (3) from the transfer case.
  4. Reposition the pinion housing vent hose (2) and mounting bracket away from the speed sensor bolt boss.
    Fig 1: Pinion Housing Vent Hose
    G01745104Courtesy of GENERAL MOTORS CORP.
  5. Remove the speed sensor (1).
  6. Remove O-ring from the speed sensor, if necessary. The O-ring may be reused if it is not cut or damaged.
    Fig 2: Speed Sensor
    G01745105Courtesy of GENERAL MOTORS CORP.


  1. Install the O-ring to the speed sensor, if removed.
  2. Install the speed sensor (1) to the transfer case.
  3. Position the pinion housing vent hose (2) and mounting bracket to the speed sensor bolt boss.
  4. Install the speed sensor bolt (3) to the transfer case.

    Tighten 

    Tighten the bolt to 130 N.m (22 lb ft).

  5. Connect the electrical connector to the speed sensor.
  6. Lower the vehicle.


  1. Lubricate the lip of the axle shaft oil seal with automatic transaxle fluid.
  2. Using the J 44752  install the axle shaft oil seal to the transfer case.

    Important:  Carefully guide the axle shaft past the axle shaft oil seal. Do NOT allow the shaft splines to contact any portion of the sealing surface or damage to the oil seal can occur.

  3. Install the right front wheel drive shaft. Refer to INSTALLATION under AXLE SHAFTS in AXLE SHAFTS - FRONT article.
  4. Install the right front tire and wheel assembly.
  5. Lower the vehicle.
  6. Inspect the transaxle fluid level.
    Fig 1: Installing Front Wheel Drive Shaft
    G01745109Courtesy of GENERAL MOTORS CORP.
  7. Inspect for fluid leaks. See TRANSFER CASE LEAK DIAGNOSIS .