GM Cadillac 1967-1989 Repair Guide

Front Knuckle, Hub and Bearing Assembly

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REMOVAL & INSTALLATION



Front Wheel Drive

THROUGH 1985



See Figures 1 and 2

The 1980-85 Sevilles and the Eldorados through 1985 use sealed wheel bearings which require no adjustment or lubrication.

  1. Remove hub cap, loosen wheel nuts, remove drive axle cotter pin and loosen drive axle nut.
  2.  
  3. Jack up car and place jackstands under lower control arms.
  4.  
  5. Remove axle nut, then remove the wheel and tire assembly.
  6.  
  7. Remove brake hose and caliper.
  8.  

Matchmark disc and hub, then remove the disc.

  1. Remove the upper ball joint cotter pin and loosen stud nut.
  2.  
  3. Strike steering knuckle near upper joint to separate it from taper.
  4.  
  5. Cover the lower control arm torsion bar connector with a short piece of rubber hose to avoid damaging the inboard tri-pot joint seal when the hub and knuckle are removed.
  6.  
  7. Remove tie rod end cotter pin and nut.
  8.  
  9. Separate tie rod end from steering knuckle using a tie rod splitter.
  10.  
  11. Remove lower ball joint cotter pin and stud nut.
  12.  
  13. Disconnect lower ball joint.
  14.  
  15. Remove hub, backing plate and steering knuckle as an assembly.
  16.  

To install:
  1. Guide the knuckle assembly over the drive axle, install the lower joint stud into the knuckle and attach the nut, but do not tighten at this time.
  2.  
  3. Install the tie rod end stud into the knuckle and attach the nut. Do not tighten at this time.
  4.  
  5. Install the upper ball joint stud into the knuckle, install the nut loosely, do not tighten at this time.
  6.  
  7. Align the disc and hub, then install the disc on the hub. Install one or two nuts on the hub to prevent the disc from falling off.
  8.  
  9. Install the caliper.
  10.  
  11. On some models it may be necessary to remove the upper ball joint nut to install the brake hose clip on the stud. Be careful not to twist the brake hose during caliper installation.
  12.  
  13. Tighten the upper ball joint nut to 60 ft. lbs. (81 Nm) and install a new cotter pin. Bend the cotter pin against the flats on the nut.
  14.  
  15. Tighten the tie rod end nut to 40 ft. lbs. (54 Nm).
  16.  
  17. Tighten the lower ball joint nut to 80 ft. lbs. (108 Nm) and install a new cotter pin. Bend the cotter pin against the flats on the nut.
  18.  
  19. Install the drive axle washer and nut but do not tighten at this time.
  20.  
  21. Remove the nuts holding the disc on the hub and install the wheel and tire. Tighten the wheel nuts until they are snug, do not tighten at this time.
  22.  
  23. Raise the car, remove the jackstands and lower the car.
  24.  
  25. Tighten the wheel lug nuts to 130 ft. lbs. (176 Nm) through 1978, or to 100 ft. lbs (136 Nm) for 1979-85 vehicles.
  26.  
  27. Install the drive axle nut and install a new cotter pin. Tighten drive axle nut to 110 ft. lbs. (149 Nm) through 1978, or to 175 ft. lbs (237 Nm) for 1979-85 vehicles.
  28.  



Click image to see an enlarged view

Fig. Fig. 1: Exploded view of the knuckle, hub and bearing assembly-Eldorado through 1978



Click image to see an enlarged view

Fig. Fig. 2: Exploded view of the knuckle, hub and bearing assembly - 1979-85 Eldorado and 1980-85 Seville

1986-89 VEHICLES

See Figures 3 and 4

To perform this procedure you will need a front hub spindle remover GM tool No. J-28733 or equivalent and a hub seal installer GM tool No. J-34657 or equivalent.

  1. Raise the vehicle, then position jackstands under its cradle. Lower the vehicle so the jackstands support it and the control arms are free. Remove the front wheel.
  2.  
  3. Use a drift inserted through one of the slots in the rotor and a caliper slot to keep the rotor from turning. Then, remove the hub nut and washer.
  4.  
  5. Remove the caliper and caliper support, then remove the rotor.
  6.  
  7. Use the spindle remover to force the drive axle out of the hub.
  8.  
  9. Remove the hub and bearings retaining bolts, then remove the hub and bearing assembly. Remove the seal by driving it toward the center of the car, then cutting it off the drive axle.
  10.  

To install:
  1. Lubricate the lip of a new seal with wheel bearing grease and install it with a seal driver.
  2.  
  3. The remainder of installation is the reverse of removal. Keep in mind the following points:
    1. Torque the hub and bearing retaining bolts to 70 ft. lbs. (95 Nm).
    2.  
    3. Install the caliper with new mounting bolts.
    4.  
    5. Install the hub nut and washer part way with the vehicle in the air. Install the wheel, then raise the vehicle, remove the jackstands, and lower it to the floor. Final torque the hub nut to 180 ft. lbs. (244 Nm).
    6.  

  4.  



Click image to see an enlarged view

Fig. Fig. 3: Separating the drive axle from the hub - 1986-89 Eldorado and Seville



Click image to see an enlarged view

Fig. Fig. 4: Hub and bearing assembly - 1986-89 Eldorado and Seville

 
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