GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1998 🢒 GMC P42 Commercial Chassis 🢒 General Information 🢒 General Information 🢒 Two-Piece Propeller Shaft Replacement

Removal Procedure

    Object Number: 1247 Size: SH
  1. Raise the vehicle and support with safety stands. Refer to Lifting and Jacking the Vehicle in General Information.

    2. Important: You must observe and accurately reference mark the positions of all driveline components relative to the propeller shaft and axles prior to disassembly. These components include the following:

       • The propeller shafts
       • The drive axles
       • The pinion flanges
       • The output shafts
    All components must be reassembled in the exact relationship to each other as they were when removed. In addition you must follow published specifications and torque values as well as any measurements made prior to disassembly. Reference mark the rear propeller shaft to the pinion flange and to the front propeller shaft, then reference mark the front shaft to the yoke at the transmission.

  2. Remove the bolts at the pinion flange.
  3. Remove the retainers at the pinion flange.
  4. Loosen the cap retainer.

    5. Important: Do not pound on the original propeller shaft yoke ears. The plastic injection joints may fracture. Do not or place any tool between a yoke and a universal joint. Tape the bearing cups onto the yoke and universal joints in order to prevent loss of the needle bearings. Slide the propeller shaft forward in order to disengage the rear universal joint from the pinion flange. Then slide the shaft rearward off the front propeller shaft splines.

  5. Remove the rear propeller shaft.

    6. Object Number: 175615 Size: SH
  6. Remove the bolts at the yoke.
  7. Remove the retainers at the yoke.

    8. Object Number: 305537 Size: SH
  8. Remove the nuts from the bolts that attach the center bearing support to the front propeller shaft.
  9. Remove the bolts and washers.
  10. Remove the front propeller shaft with the center bearing support from the vehicle.
  11. Clean all parts with an approved solvent.
  12. Inspect the outer diameter of the transmission yoke for burrs.
  13. Inspect for proper installation and uniform seating of the bearing cups.
  14. Inspect for twisted slip yoke splines or an incorrect universal joint.

Installation Procedure

    Object Number: 305537 Size: SH

    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.

  1. Install the center bearing support to the crossmember to the following components:
    2. • The bolts
    • The washers
    • The nuts

    Tighten
    Tighten the center bearing support bolts to 53 N·m (39 lb ft).


    Object Number: 175615 Size: SH
  2. Line up the reference marks and install the front propeller shaft up against the yoke.

    3. Tighten

        • Tighten the bolts (at the axle end) to 20 N·m (15 lb ft) (without the transmission mounted drum parking brake).
        • Tighten the bolts (at the axle end) to 28 N·m (21 lb ft) (with the transmission mounted drum parking brake).

    Object Number: 1247 Size: SH
  3. Install the rear propeller shaft. Line up the reference marks.
    4. • Slide the front end of the shaft onto the splines of the front shaft.
    • Slide the front end of the shaft far enough forward in order to allow the rear universal joint to engage the pinion flange.
  4. Set the seal in place and secure the cap retainer onto the rear shaft.
  5. Install the retainers.
  6. Install the bolts.

    7. Tighten

        • Tighten the bolts (at the axle end) to 20 N·m (15 lb ft) (without the transmission mounted drum parking brake).
        • Tighten the bolts (at the axle end) to 44 N·m (33 lb ft) (with the transmission mounted drum parking brake).
  7. Remove the safety stands and lower the vehicle.