GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1998 🢒 Yukon - 2WD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 4L60-E 🢒 Vehicle Speed Sensor and Case Extension Installation

Vehicle Speed Sensor and Case Extension Installation 2WD Applications Only

Tools Required

J 21426 Rear Seal Installer


    Object Number: 190475 Size: SH
  1. Using the J 21426 , install an output shaft sleeve (690) and an output shaft seal (691).

    2. Do not push the sleeve past the machined surface on the output shaft.


    Object Number: 207639 Size: SH
  2. Install the case extension to case seal (30) and the case extension (31).

    3. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  3. Install the case extension to case bolts (32).

    4. Tighten
    Tighten the bolts to 45 N·m (33 lb ft).


    Object Number: 181582 Size: SH
  4. Inspect the internal transmission speed sensor for the following conditions:
    5. • Cracks
    • Nicks
    • Damage

    Object Number: 207618 Size: SH
  5. Install a new O-ring seal (37) on the internal transmission speed sensor (36).
  6. Install the internal transmission speed sensor (36).

    7. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  7. Install the speed sensor retaining bolt (35).

    8. Tighten
    Tighten the bolt to 12 N·m (9 lb ft).


    Object Number: 207641 Size: SH
  8. Using the J 21426 , install the case extension oil seal assembly (34) (model dependent).