GM Cadillac 1967-1989 Repair Guide

Halfshafts

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Drive axles (halfshafts) on these front wheel drive models are flexible assemblies and consist of an axle shaft with an inner and outer constant velocity (CV) joint. The right halfshaft has a torsional damper mounted in the center. The inner constant velocity joint has complete flexibility, plus inward and outward movement. The outer constant velocity joint has complete flexibility but doesn't allow for inward and outward movement.

REMOVAL & INSTALLATION



1967-78 Eldorado

RIGHT DRIVE AXLE



  1. Remove the negative battery cable and the wheel disc.
  2.  
  3. If the halfshaft is to be removed, release the cotter pin and loosen but do not remove the spindle nut.
  4.  
  5. Raise the car at the lower control arms.
  6.  
  7. Loosen but do not remove the right front shock absorber lower mounting nut. Then pry the shock absorber along the lower mounting stud until it reaches the nut. Do not remove the shock absorber from the lower mount.
  8.  
  9. To keep the torsion bar connectors from being damaged, cover them with a short length of rubber hose.
  10.  
  11. Remove the screws securing the halfshaft to the output shaft.
  12.  
  13. Position the inside end of the halfshaft toward the starter motor to gain access to the output shaft. Then remove the screw which supports the output shaft to the final drive housing.
  14.  
  15. Remove the two screws which support the right output shaft support to the engine.
  16.  
  17. Remove the output shaft, support and strut as an assembly in the following manner.
    1. Slide the output shaft outward to disengage the splines.
    2.  
    3. Move the inside end of the assembly forward and downward until it is clear of the car.
    4.  

  18.  
  19. If the halfshaft is to be removed, use the following procedure.
    1. Using a hammer and a wooden block tap the end of the halfshaft to unseat the axle at the hub.
    2.  

  20.  

The spindle nut should be loosened but not removed.

  1. Rotate the axle inward and toward the front of the car positioning the axle over the front crossmember and out from under the car.
  2.  

To install:
  1. Carefully place right hand halfshaft assembly into lower control arm and enter outer race splines into knuckle.
  2.  
  3. Lubricate final drive output shaft seal with wheel bearing grease.
  4.  
  5. Install right hand output shaft into final drive and attach the support bolts to engine and brace. Torque the bolts to 50 ft. lbs. (68 Nm).
  6.  
  7. Install brace.
  8.  
  9. Move right hand halfshaft assembly toward front of car and align with right hand output shaft. Install attaching bolts and torque to 65 ft. lbs. (88 Nm).
  10.  
  11. Install washer and nut on halfshaft.
  12.  
  13. Remove the jack stands and lower the vehicle.
  14.  
  15. Tighten wheel lugs to 130 ft. lbs. (176 Nm); drive axle nut to 110 ft. lbs. (149 Nm). Install cotter pin.
  16.  

Align the hole by tightening the nut.LEFT DRIVE AXLE

  1. Hoist car under the lower control arms.
  2.  
  3. Remove wheel and tire.
  4.  
  5. Remove halfshaft cotter pin, nut and washer.
  6.  
  7. Install a piece of rubber hose over lower control arm torsion bar connector.
  8.  
  9. Remove six halfshaft-to-output shaft screws and washers.
  10.  
  11. Loosen upper shock mounting bolt.
  12.  
  13. Remove upper control arm ball joint cotter pin and nut.
  14.  
  15. Using hammer and brass drift, drive on knuckle until upper ball joint stud is free.
  16.  
  17. Remove brake hose bracket.
  18.  
  19. Tip upper part of knuckle and support outward so that brake hose is not damaged.
  20.  
  21. Carefully guide the halfshaft assembly outward. Remove left output shaft retaining bolt by installing two screws in the shaft flange to prevent shaft rotation. Pull the shaft straight out toward side of car.
  22.  

Care must be exercised so that constant velocity joints do not turn to full extremes and that seals are not damaged against shock absorber or stabilizer bar.

  1. To install, reverse removal procedure. Tighten output shaft retaining bolt to 50 ft. lbs. (68 Nm), upper ball joint stud nut to 60 ft. lbs. (81 Nm), upper shock absorber bolt to 75 ft. lbs (102 Nm). Tighten wheel lug nuts to 130 ft. lbs. (176 Nm) Tighten halfshaft nut to 110 ft. lbs. (149 Nm).
  2.  

1979-85 Eldorado and 1980-85 Seville

See Figures 1 and 2 RIGHT SIDE

  1. Hoist car under lower control arms and remove the wheel.
  2.  
  3. Remove halfshaft cotter pin, retainer, nut and washer from the wheel hub.
  4.  
  5. Remove the oil filter.
  6.  
  7. Remove inner constant velocity joint attaching bolts.
  8.  
  9. Push inner constant velocity joint outward enough to disengage the right hand final drive output shaft, then move rearward.
  10.  
  11. Remove right hand output shaft bracket bolts to engine and final drive.
  12.  
  13. Remove right hand output shaft and halfshaft assembly.
  14.  

To install:
  1. Carefully place right hand halfshaft assembly into lower control arm and enter outer race splines into knuckle.
  2.  
  3. Lubricate final drive output shaft seal, with special seal lubricant.
  4.  
  5. Install right hand output shaft into final drive and attach the support bolts to engine and brace. Torque the bolts to 50 ft. lbs. (68 Nm).
  6.  
  7. Move right hand halfshaft assembly toward front of car and align with right hand output shaft. Install attaching bolts and torque to 60 ft. lbs. (81 Nm).
  8.  
  9. Install the oil filter.
  10.  
  11. Install washer and nut on Torque to 175 ft. lbs. (237 Nm), then install the retainer and cotter pin.
  12.  
  13. Remove floor stands and lower hoist.
  14.  
  15. Check engine oil level.
  16.  

LEFT SIDE
  1. Hoist car under lower control arms.
  2.  
  3. Remove wheel. Remove disc.
  4.  
  5. Remove halfshaft cotter pin, nut and washer.
  6.  
  7. Remove tie rod-end cotter pin and nut.
  8.  
  9. Remove the tie rod end from the knuckle with a puller.
  10.  
  11. Remove bolts from halfshaft assembly and left output shaft. Insert a spacer between the halfshaft and lower control arm.
  12.  
  13. Remove upper control arm ball joint cotter pin and nut.
  14.  
  15. Using hammer and brass drift, drive on knuckle until upper ball joint stud is free.
  16.  
  17. Using puller, remove lower ball joint from knuckle on 1979 models. Care must be exercised so that ball joint does not damage halfshaft seal.
  18.  
  19. Remove knuckle and support, so that the brake hose is not damaged on 1979 models, support the knuckle on 1980 and later models.
  20.  
  21. Carefully remove halfshaft assembly.
  22.  

To install:

WARNING
Care must be exercised so that constant velocity joints do not turn to full extremes and that seals are not damaged against shock absorber or stabilizer bar.

  1. Carefully guide left hand halfshaft assembly onto lower control arm and into position on spacer.
  2.  
  3. Insert lower control ball joint stud into knuckle and attach nut on 1979 models. Do not torque.
  4.  
  5. Center left hand halfshaft assembly in opening of knuckle and insert upper ball joint stud.
  6.  
  7. Tighten the upper ball joint to 61 ft. lbs. (83 Nm) and the lower ball joint to 92 ft. lbs. (125 Nm).
  8.  
  9. Install the tie rod end and tighten to 40 ft. lbs. (54 Nm).
  10.  

Always install new cotter pins after tightening ball stud nuts.

  1. Install the halfshaft washer and nut, then tighten the retaining nut to 176 ft. lbs. (238 Nm).
  2.  
  3. Install the new halfshaft cotter pin through the castle nut.
  4.  
  5. Install the rotor, then install the tire and wheel assembly.
  6.  
  7. Remove the jackstands and lower the vehicle.
  8.  



Click image to see an enlarged view

Fig. Fig. 1: Exploded view of the front halfshafts - 1979-85



Click image to see an enlarged view

Fig. Fig. 2: Use a small prybar and the special tool shown to pull the halfshaft out of the transaxle - make sure to support the halfshaft at the center to avoid putting downward force on the outer joint

1986-89 Eldorado and Seville

See Figure 3

To perform this procedure, you will need a special puller J-28733 or equivalent and new prevailing torque nut for each axle you need to remove.

  1. Remove the prevailing torque hub nut and washer. Then, raise the vehicle and support it securely.
  2.  
  3. Remove the wheel and tire.
  4.  
  5. Remove the brake caliper and rotor.
  6.  
  7. Disconnect: the stabilizer bar at the control arm; the tie rod end at the steering knuckle and the lower ball joint stud at the steering knuckle. Then, use a prybar and screwdriver against a wood block (to protect the case) to pry the drive axle out of the transaxle case.
  8.  
  9. Use the special puller to force the drive axle out of the hub, and remove the axle from the car. Inspect the boot seals for damage and replace as necessary.
  10.  

To install:
  1. Position the drive axle ends into the steering knuckle and transaxle without fully seating them.
  2.  
  3. Refasten the lower ball joint stud to the steering knuckle and torque the nut as described in Suspension & Steering . Reconnect the stabilizer bar to the lower control arm and the tie rod end to the steering knuckle, again referring to Suspension & Steering .
  4.  
  5. Reinstall the brake caliper with new mounting bolts.
  6.  
  7. Install a washer and new prevailing torque nut; torque the nut to 74 ft. lbs. (100 Nm). You can prevent the axle from turning when you torque the nut by inserting a small prybar into one of the slots in the brake rotor.
  8.  
  9. Seat the drive axle in the transaxle by positioning a screwdriver into the groove on the CV-joint housing and tapping the screwdriver with a hammer until the axle is seated. Grab the housing of the drive axle (not the driveshaft) and pull it outward to make sure the axle is properly seated.
  10.  
  11. Install the wheel and tire. Lower the vehicle. Then, final-torque the hub nut to 183 ft. lbs. (248 Nm).
  12.  



Click image to see an enlarged view

Fig. Fig. 3: Exploded view of the front halfshaft - 1986-89 Eldorado and Seville

CV-JOINT OVERHAUL



See Figures 4, 5, 6 and 7

For all CV-joint overhaul procedures, please refer to the accompanying illustrations.



Click image to see an enlarged view

Fig. Fig. 4: Removal and installation of the inner CV-joint seal and assembly - 1979-85



Click image to see an enlarged view

Fig. Fig. 5: Removal and installation of the outer CV-joint seal and assembly - 1979-85



Click image to see an enlarged view

Fig. Fig. 6: Removal and installation of the outer CV-joint seal and assembly - 1986-89



Click image to see an enlarged view

Fig. Fig. 7: Removal and installation of the Inner CV-joint seal and assembly - 1986-89

 
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