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    GM Blazer/Jimmy/Typhoon/Bravada 1983-1993 Repair Guide

    Steering Knuckle and Spindle

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    REMOVAL & INSTALLATION



    2wd Vehicles

    See Figure 1

    1. Raise and support the front of the vehicle frame using jackstands.
    2.  

    When supporting the vehicle on jackstands, DO NOT place the jackstands under the lower control arms as spring tension will be used to help separate the ball joint studs from the knuckle. Place the jackstands under the frame and use a suitable floor jack under the control arm for safety.

    1. Remove the tire and wheel assembly.
    2.  
    3. Remove the brake caliper from the steering knuckle and hang it from the vehicle using wire or a coat hanger. Make sure the brake line is not stretched or otherwise damaged.
    4.  
    5. Remove the grease cup, the cotter pin, the castle nut and the hub-and-rotor assembly. For details, please refer to the brake rotor (disc) procedure located in Brakes of this guide and the wheel bearing procedures in General Information & Maintenance .
    6.  
    7. Remove the splash shield-to-steering knuckle bolts and separate the shield from the knuckle.
    8.  
    9. At the tie rod end-to-steering knuckle stud, remove the cotter pin and the nut. Use a suitable jawed tie rod end puller tool such as J-6627-A, J-24319-01 or equivalent to separate the tie rod end from the steering knuckle.
    10.  
    11. Position a floor jack under the spring seat of the lower control arm in order to retain the spring seat. Raise the floor jack until it just contacts the arm.
    12.  
    13. Remove the cotter pins from the upper and lower ball joint studs, then loosen the retaining nuts.
    14.  
    15. Use a ball joint separator such as J-2371 or equivalent to separate the upper ball joint from the steering knuckle. Remove the nut and pivot the upper control arm free of the knuckle.
    16.  
    17. Use the ball joint tool to separate the lower ball joint from the steering knuckle, then remove the nuts and lift the steering knuckle from the lower control arm.
    18.  



    Click image to see an enlarged view

    Fig. Fig. 1: Use a suitable jawed tie rod end puller to separate the end from the steering knuckle

    1. Clean and inspect the steering knuckle and spindle for signs of wear or damage; if necessary, replace the steering knuckle. If any out-of-roundness is found in the tapered knuckle hole it MUST be replaced.
    2.  

    To install:
    1. Position the steering knuckle onto the lower ball joint stud, then lift the upper control arm to insert the upper ball joint stud into the steering knuckle. Loosely install both ball joint stud nuts to hold the components in position.
    2.  
    3. Properly tighten the upper and lower ball joint stud nuts, then install new cotter pins. For details, please refer to the procedures located earlier in this section.
    4.  

    When installing a cotter pin, never loosen the castle nut to expose the cotter pin hole.

    1. If equipped, position a new steering knuckle gasket.
    2.  
    3. Install the splash shield to the knuckle and secure the retaining bolts.
    4.  
    5. Install the tie rod end to the steering knuckle, then tighten the stud nut to specification and install a new cotter pin.
    6.  
    7. Install the hub and rotor assembly and castle nut. Properly adjust the wheel bearings, then install a new cotter pin followed by the grease cup. For wheel bearing adjustment procedures, please refer to General Information & Maintenance of this guide.
    8.  
    9. Remove the support, then reposition and secure the brake caliper.
    10.  
    11. Install the tire and wheel assembly.
    12.  
    13. Remove the jackstands and carefully lower the vehicle.
    14.  
    15. Check and/or adjust the front end alignment, as necessary.
    16.  

    4wd Vehicles

    See Figures 2, 3, 4, 5, 6, 7, 8 and 9

    The following procedure requires the use a universal steering linkage puller J-24319-01, an axle shaft boot seal protector J-28712, a ball joint separator tool J-34026 and a steering knuckle seal installation tool J-28574 or their equivalents.

    VEHICLES THROUGH 1992
    1. At the wheel hub, remove the cotter pin and the retainer. Loosen the castle nut.
    2.  
    3. Raise and support the front of the vehicle safely using jackstands.
    4.  
    5. Properly unload the torsion bar. For details, please refer to the torsion bar procedure located earlier in this section.
    6.  
    7. Remove the tire and wheel assembly.
    8.  
    9. Install an axle shaft boot seal protector to the tri-pot axle joint.
    10.  
    11. Remove the brake caliper and support aside using wire or a coat hanger. Make sure the brake line is not stretched or damaged.
    12.  
    13. Remove the brake disc from the wheel hub.
    14.  
    15. Remove the castle nut.
    16.  
    17. Remove the cotter pin and castle nut from the tie-rod end, then use the steering linkage puller to separate the tie rod end from the knuckle.
    18.  
    19. Remove the hub/bearing assembly-to-steering knuckle retaining bolts from the rear of the knuckle, then remove the hub/bearing assembly from the steering knuckle.
    20.  

    When removing the steering knuckle and wheel hub, be careful not to damage the splined surface of the half shaft.

    1. Remove the splash shield.
    2.  
    3. Remove the cotter pins from the upper and lower ball joints, then back off the castle nut(s).
    4.  
    5. Use the ball joint separator tool J-34026 or equivalent to loosen the ball joints in the steering knuckle.
    6.  
    7. Remove the ball joint nuts, then separate the ball joints from the knuckle and remove the knuckle from the vehicle.
    8.  
    9. Remove the spacer and the seal from the steering knuckle.
    10.  
    11. Clean and inspect the parts for nicks, scores and/or damage, then replace them as necessary.
    12.  

    To install:
    1. Install a new seal into the steering knuckle, using a knuckle seal installation tool such as J-28574 or equivalent.
    2.  



    Click image to see an enlarged view

    Fig. Fig. 2: Installing a new seal on the 4wd steering knuckle

    1. Install the spacer, then position the knuckle and insert the upper and lower ball joints.
    2.  
    3. Install the upper and lower ball joint stud nuts, then tighten to specification and install new cotter pins. For details, please refer to the ball joint procedures located earlier in this section.
    4.  
    5. Position the splash shield to the steering knuckle, then install the wheel hub/bearing assembly while aligning the threaded holes. Tighten the hub/bearing assembly retaining bolts to 86 ft. lbs. (116 Nm).
    6.  
    7. Install the tie rod end to the steering knuckle, then secure using the retaining nut and cotter pin.
    8.  
    9. Install the thrust washer and the castle nut to the drive axle and tighten to 180 ft. lbs. (23 Nm). Install the retainer and a new cotter pin (DO NOT back off the torque specification).
    10.  
    11. Install the brake disc.
    12.  
    13. Reposition and secure the brake caliper.
    14.  
    15. Remove the axle boot protector and the torsion bar unloader tool.
    16.  
    17. Install the tire and wheel assembly.
    18.  
    19. Remove the jackstands and carefully lower the truck.
    20.  



    Click image to see an enlarged view

    Fig. Fig. 3: Remove the wheel in order to access the steering knuckle components



    Click image to see an enlarged view

    Fig. Fig. 4: Remove the cotter pin from the drive axle end nut retainer



    Click image to see an enlarged view

    Fig. Fig. 5: Remove the retainer for access to the end nut



    Click image to see an enlarged view

    Fig. Fig. 6: The various ball studs must be removed from the steering knuckle as well



    Click image to see an enlarged view

    Fig. Fig. 7: Remove the cotter pin (in this case from the tie rod end)



    Click image to see an enlarged view

    Fig. Fig. 8: Loosen and remove the retaining nut so the tie rod may be separated



    Click image to see an enlarged view

    Fig. Fig. 9: Tighten the drive axle nut and torque to specification

    1993 VEHICLES
    1. Raise and support the front of the vehicle safely using jackstands.
    2.  
    3. Properly unload the torsion bar. For details, please refer to the torsion bar procedure located earlier in this section.
    4.  
    5. Remove the tire and wheel assembly.
    6.  
    7. Install an axle shaft boot seal protector to the tri-pot axle joint.
    8.  
    9. At the wheel hub, remove the cotter pin and retainer, then loosen and remove the castle nut and the thrust washer. In order to hold the hub from turning when loosening the nut, insert a drift through the caliper and into the rotor vanes.
    10.  
    11. Remove the brake caliper and support it aside using wire or a coat hanger. Make sure the brake line is not stretched or damaged.
    12.  
    13. Remove the brake disc from the wheel hub.
    14.  
    15. Remove the bolts retaining the hub/bearing assembly to the knuckle, then carefully pull the assembly from the splined end of the halfshaft. If available, use J-28733-A, or an equivalent spindle remover to prevent damage to the shaft or hub/bearing assembly.
    16.  

    When removed, lay the hub and bearing assembly on the hub bolt (outboard) side in order to prevent damage or contamination of the bearing seal.

    1. Remove the splash shield.
    2.  
    3. Remove the cotter pin and castle nut from the tie rod end, then separate the end from the knuckle using a suitable steering linkage puller.
    4.  
    5. Remove the cotter pins from the ball joints, then loosen the stud nuts.
    6.  
    7. Use the ball joint separator tool J-36607 or equivalent to loosen the ball joints in the steering knuckle.
    8.  
    9. Remove the ball joint nuts, then separate the ball joints from the knuckle and remove the knuckle from the vehicle.
    10.  
    11. Remove the spacer and the seal from the steering knuckle.
    12.  
    13. Clean and inspect the parts for nicks, scores and/or damage, then replace them as necessary.
    14.  

    To install:
    1. Install a new seal into the steering knuckle, using a knuckle seal installation tool such as J-28574 or equivalent.
    2.  
    3. Install the spacer, then position the knuckle and insert the upper and lower ball joints.
    4.  
    5. Install the upper and lower ball joint stud nuts and tighten to specification, then install new cotter pins. For details, please refer to the ball joint procedures located earlier in this section.
    6.  
    7. Align the splash shield to the knuckle, then install the hub and bearing assembly, aligning the threaded holes. Install the retaining bolts and tighten to 77 ft. lbs. (105 Nm).
    8.  
    9. Install the tie rod end of the steering knuckle, then secure using the retaining nut and a new cotter pin.
    10.  
    11. Install the brake disc.
    12.  
    13. Reposition and secure the brake caliper.
    14.  
    15. Install the washer and retaining nut to the end of the halfshaft. Insert a brass drift to keep the rotor and hub from turning, then tighten the shaft nut to 180 ft. lbs. (23 Nm).
    16.  
    17. Install the retainer and a new cotter pin, but DO NOT back off specification in order to insert the cotter pin.
    18.  
    19. Remove the torsion bar unloader tool and the drive axle boot protector.
    20.  
    21. Install the tire and wheel assembly.
    22.  
    23. Remove the jackstands and carefully lower the vehicle.
    24.  
    25. Check and/or adjust the vehicle trim height, as necessary.
    26.  

     
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