Roadmaster 1992

Lower Ball Joints


Removal & Installation

At this time the manufacturer does not provide removal and installation procedures for this component. The following procedure is a guideline and may differ from the vehicle you are servicing.

  1. Before servicing the vehicle, refer to the Precautions Section.
    Disconnecting the negative battery cable on some vehicles may interfere with the functions of the on-board computer systems and may require the computer to undergo a relearning process, once the negative battery cable is reconnected.

    If working near and/or around the SRS system and components, be sure to properly disable the SRS system. See disarming/arming the SRS system.

    For vehicles equipped with OnStar (RPO UE1), with battery backup, the backup battery is a redundant power supply to allow limited ONStar functionality in the event of a main battery power disruption to the OnStar module (VCIM). Do not disconnect the main vehicle battery or remove the OnStar fuse with the ignition key in any position other than OFF. Retained accessory power should be allowed to time out or be disabled by opening the driver-s side door before disconnecting power. Disconnecting power to the module in any way while the ignition is ON or with the retained accessory power activated may cause activation of the OnStar backup battery system and will discharge and permanently damage the backup battery. Once the backup battery is activated it will stay on until it has completely discharged. The backup battery is not rechargeable and once it is activated, it must be replaced.

  3. Disconnect the negative battery cable.
  5. Raise and safely support the vehicle.
  7. Remove the cotter pin from the ball stud. Discard the cotter pin.
  9. Loosen but do not remove the stud nut. Do not loosen more than one turn.
    Be sure to properly support the lower control arm to prevent the coil spring from forcing the control arm downward.

  11. Install tool J23742 or equivalent between the stud and turn the threaded end of the tool until the stud is free of the steering knuckle.
  13. Remove the stud nut.
  15. Pull outward on the bottom of the tire at the same time push the wheel and tire assembly upward to free the knuckle from the ball joint stud.
  17. Lift up on the upper control arm, with the knuckle and hub assembly attached, and place a block of wood between the frame and the upper arm.
    Do not pull on the brake line hose when lifting the knuckle and hub assembly.

  19. Remove the tie rod from the steering knuckle, only if necessary.
  21. Place tools J9519-03 and J9519-7 into position.
  23. Turn the hex bolt until the lower ball joint is pushed out of the control arm.
  25. Remove the tools.

    Click image to see an enlarged view

    Fig. Removing ball studs from the knuckle (upper and lower)

    Click image to see an enlarged view

    Fig. Lower ball joint removal (1 of 2)

    Click image to see an enlarged view

    Fig. Lower ball joint removal (2 of 2)


To install:

Be sure to use new fasteners, as required.

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 sealer are identified. 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.

  1. Installation is the reverse of the removal procedure.
  3. Check and adjust front alignment, as required.
  5. Using the GM diagnostic scan tool or aftermarket equivalent reprogram the necessary systems and components. Be sure to follow the scan tool manufacturer-s directions.