Chrysler Full-Size Trucks 1967-1988 Repair Guide

Front Wheel Bearings

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REMOVAL, REPACKING, & INSTALLATION



Before handling the bearings, there are a few things that you should remember to do and NOT to do.

Remember to DO the following:


Remove all outside dirt from the housing before exposing the bearing.
 
Treat a used bearing as gently as you would a new one.
 
Work with clean tools in clean surroundings.
 
Use clean, dry canvas gloves, or at least clean, dry hands.
 
Clean solvents and flushing fluids are a must.
 
Use clean paper when laying out the bearings to dry.
 
Protect disassembled bearings from rust and dirt. Cover them up.
 
Use clean rags to wipe bearings.
 
Keep the bearings in oil-proof paper when they are to be stored or are not in use.
 
Clean the inside of the housing before replacing the bearing.
 

Do NOT do the following:


Don't work in dirty surroundings.
 
Don't use dirty, chipped or damaged tools.
 
Try not to work on wooden benches or use wooden mallets.
 
Don't handle bearings with dirty or moist hands.
 
Do not use gasoline for cleaning; use a safe solvent.
 
Do not spin-dry bearings with compressed air. They will likely be damaged.
 
Do not spin dirty bearings.
 
Avoid using cotton, waste, or dirty cloths to wipe bearings.
 
Try not to scratch or nick bearing surfaces.
 
Do not allow the bearing to come in contact with dirt or rust at any time.
 

2 Wheel Drive

See Figures 1, 2 and 3

  1. Raise and support the front end on jackstands.
  2.  
  3. Remove the wheel cover. Remove the wheel.
  4.  
  5. On vehicles equipped with drum brakes:
    1. Loosen the star adjusting wheel, remove the brake drum.
    2.  
    3. Remove the grease cap from the spindle. Then, remove the cotter pin, locknut, adjusting nut along with the bearing assembly from the spindle.
    4.  
    5. Clean the roller assembly with solvent and shake dry. If the roller assembly shows excessive wear or damage, replace the bearing.
    6.  
    7. It is imperative that all old grease be removed from the bearings and surrounding surfaces before repacking. The new lithium-based grease is not compatible with the sodium base grease used in the past.
    8.  
    9. Clean the spindle with solvent to thoroughly remove all old grease.
    10.  
    11. Covering the spindle with a clean cloth, brush all loose dirt and dust from the brake assembly. Remove the cloth carefully so as to not get dirt on the spindle.
    12.  
    13. Install the brake drum and outer bearing to proper preload.
    14.  
    15. With the wheel rotating to seat the bearing, adjust the wheel bearings by torquing the adjusting nut to 17-25 ft. lbs. (23-34 Nm). Then back off the adjusting nut 1 / 2 turn. Retighten the adjusting nut finger-tight. Install the locknut, aligning the castellations with the hole, then install a new cotter pin. Bend the ends of the cotter pin around the castellations (not over top) to prevent interference with the radio static collector in the grease cap. Install the grease cap.
    16.  
    17. Install the wheels.
    18.  
    19. Lower the vehicle, tighten lug nuts.
    20.  
    21. Install the wheel cover.
    22.  

  6.  
  7. On vehicles equipped with disc brakes:
  8.  



Click image to see an enlarged view

Fig. Fig. 1: Exploded view of 2WD front wheel and bearing assembly



Click image to see an enlarged view

Fig. Fig. 2: Front wheel bearing removal using a driver

    1. Remove the caliper from the disc and wire it to the underbody to prevent damage to the brake hose. See Brakes .
    2.  
    3. Remove the grease cap from the hub. Then, remove the cotter pin, nut lock, adjusting nut and flat washer from the spindle. Remove the outer bearing assembly from the hub.
    4.  
    5. Pull the hub and disc assembly off the wheel spindle.
    6.  
    7. Remove and discard the old grease retainer. Remove the inner bearing cone and roller assembly from the hub.
    8.  
    9. Clean all grease from the inner and outer bearing cups with solvent. Inspect the cups for pits, scratches, or excessive wear. If the cups are damaged, remove them with a drift.
    10.  
    11. Clean the inner and outer cone and roller assemblies with solvent and shake them dry. If the cone and roller assemblies show excessive wear or damage, replace them with the bearing cups as a unit.
    12.  
    13. Clean the spindle and the inside of the hub with solvent to thoroughly remove all old grease.
    14.  
    15. Covering the spindle with a clean cloth, brush all loose dirt and dust from the brake assembly. Remove the cloth carefully so as to not get dirt on the spindle.
    16.  
    17. If the inner and/or outer bearing cups were removed, install the replacement cups on the hub. Be sure that the cups seat properly in the hub.
    18.  
    19. It is imperative that all old grease be removed from the bearings and surrounding surfaces before repacking. The new lithium-based grease is not compatible with the sodium base grease used in the past.
    20.  
    21. Install the hub and disc on the wheel spindle. To prevent damage to the grease retainer and spindle threads, keep the hub centered on the spindle.
    22.  
    23. Install the outer bearing cone and roller assembly, along with the flat washer, on the spindle. Install the adjusting nut.
    24.  
    25. With the wheel rotating to seat the bearing, adjust the wheel bearings by torquing the adjusting nut to 30-40 ft. lbs. (41-54 Nm). Then back off the adjusting nut 1 / 2 turn. Retighten the adjusting nut finger-tight. Install the nut lock, aligning the castellations with the hole, then install a new cotter pin. Bend the ends of the cotter pin around the castellations (not over top) to prevent interference with the radio static collector in the grease cap. Install the grease cap.
    26.  
    27. Install the wheels.
    28.  
    29. Lower the vehicle, tighten lug nuts.
    30.  
    31. Install the wheel cover.
    32.  




Click image to see an enlarged view

Fig. Fig. 3: Front wheel bearing installation

DRUM BRAKE ADJUSTMENT

The front wheels each rotate on a set of opposed, tapered roller bearings. The grease retainer at the inside of the hub prevents lubricant from leaking into the brake drum.

  1. Raise and support the front end on jackstands.
  2.  
  3. Remove the grease cap and remove excess grease from the end of the spindle.
  4.  
  5. Remove the cotter pin and nut lock.
  6.  
  7. Rotate the wheel, hub and drum assembly while tightening the adjusting nut to 17-25 ft. lbs. (23-34 Nm) in order to seat the bearings.
  8.  
  9. Back off the adjusting nut 1 / 2 , then retighten the adjusting nut finger-tight.
  10.  
  11. Install the new cotter pin, bending the ends of the cotter pin around the nut lock castellated flange (not over top).
  12.  
  13. Check the wheel for proper rotation, then install the grease cap filled with lubricant. If the wheel still does not rotate properly, inspect and clean or replace the wheel bearings and cups.
  14.  
  15. Install the wheels.
  16.  
  17. Lower the vehicle, tighten lug nuts.
  18.  
  19. Install the wheel cover.
  20.  

DISC BRAKE ADJUSTMENT
  1. Raise and support the front end on jackstands.
  2.  
  3. Remove the grease cap and remove excess grease from the end of the spindle.
  4.  
  5. Remove the cotter pin and nut lock.
  6.  
  7. Rotate the wheel, hub and disc assembly while tightening the adjusting nut to 30-40 ft. lbs. (41-54 Nm) in order to seat the bearings.
  8.  
  9. Back off the adjusting nut 1 / 2 , then retighten the adjusting nut finger-tight.
  10.  
  11. Locate the nut lock on the adjusting nut so that the castellations on the lock are aligned with the cotter pin hole in the spindle.
  12.  
  13. Install the new cotter pin, bending the ends of the cotter pin around the castellated flange of the nut lock.
  14.  
  15. Check the wheel for proper rotation, then install the grease cap filled with lubricant. If the wheel still does not rotate properly, inspect and clean or replace the wheel bearings and cups.
  16.  


WARNING
New bolts must be used when servicing floating caliper units. The upper bolt must be tightened first. For floating caliper units, see Disc Brake Caliper Service in Brakes .

  1. Install the wheels.
  2.  
  3. Lower the vehicle, tighten lug nuts.
  4.  
  5. Install the wheel cover.
  6.  

4 Wheel Drive
DANA 44 AND 60 WITH LOCKING HUBS

See Figure 4

  1. Raise the vehicle and install safety stands.
  2.  
  3. Refer to Front Drive Axle for removal of hub assemblies.
  4.  
  5. Remove the wheel bearing locknut, with a hub nut wrench.
  6.  
  7. Remove the lockring from the bearing adjusting nut. This can be done with your finger tips or a screwdriver.
  8.  
  9. Remove the bearing adjusting nut (with the hub wrench).
  10.  
  11. Remove and suspend the caliper out of the way.
  12.  
  13. Slide the hub and disc assembly off of the spindle. Be careful, as the outer bearing will slide out as the hub is removed.
  14.  
  15. Lay the hub on a clean work surface. Using a driver, carefully remove the inner bearing cone and seal from the hub.
  16.  



Click image to see an enlarged view

Fig. Fig. 4: Removing or installing the outer locknut on Dana 60 or 70 front drive axle

  1. Inspect the bearing cups for pits or cracks. If necessary, remove them with a drift. If new cups are installed, install new bearings.
  2.  
  3. Lubricate the bearings with wheel bearing grease. Clean all old grease from the hub. Pack the cones and rollers. If a bearing packer is not available, work as much lubricant as possible between the rollers and the cages.
  4.  
  5. Drive new cups into place with a driver, making sure that they are fully seated.
  6.  
  7. Position the inner bearing cone and roller in the inner cup and install the grease retainer.
  8.  
  9. Carefully position the hub and disc assembly on the spindle.
  10.  
  11. Install the outer bearing cone and roller, along with the adjusting nut.
  12.  

The adjusting nut has a small dowel on one side. This dowel faces outward to engage the locking ring.

  1. Using a hub nut wrench tighten the bearing adjusting nut to 50 ft. lbs. (67 Nm), while rotating the wheel back and forth to seat the bearings.
  2.  
  3. Back off the adjusting nut approximately 90°.
  4.  
  5. Install the lockring by turning the nut to the nearest hole and inserting the dowel pin.
  6.  

The dowel pin must seat in a lockring hole for proper bearing adjustment and wheel retention.

  1. Install the outer locknut and tighten to 50-80 ft. lbs. (67-108 Nm). Final end-play of the wheel on the spindle should be 0.001-0.010 in. (0.025-0.25mm).
  2.  
  3. Assemble the hub parts.
  4.  
  5. Install the caliper.
  6.  
  7. Remove the safety stands and lower the vehicle.
  8.  

EARLY DANA 44 WITHOUT LOCKING HUBS



See Figure 5

  1. Raise and support the front end on jackstands.
  2.  
  3. Remove the grease cap.
  4.  
  5. Remove the drive flange bolts and snapring.
  6.  
  7. Using a puller, remove the drive flange.
  8.  
  9. Unbend the locktab and remove the outer locknut.
  10.  
  11. Remove the lockring and the bearing inner adjusting nut.
  12.  
  13. Remove the hub and drum assembly. Take care not to drop the outer bearing.
  14.  
  15. Lay the hub on a clean work surface. Carefully drive the inner bearing cone and grease seal out of the hub using a bearing driver.
  16.  
  17. Inspect the bearing cups for pits or cracks. If necessary, remove them with a drift. If new cups are installed, install new bearings.
  18.  
  19. Lubricate the bearings with wheel bearing grease. Clean all old grease from the hub. Pack the cones and rollers. If a bearing packer is not available, work as much lubricant as possible between the rollers and the cages.
  20.  
  21. Drive new cups into place with a driver, making sure that they are fully seated.
  22.  
  23. Position the inner bearing cone and roller in the inner cup and install the grease retainer.
  24.  
  25. Carefully position the hub and drum assembly on the spindle.
  26.  
  27. Install the outer bearing cone and roller, along with the adjusting nut.
  28.  

The adjusting nut has a small dowel on one side. This dowel faces outward to engage the locking ring.

  1. Using a hub nut wrench tighten the bearing adjusting nut to 50 ft. lbs. (67 Nm), while rotating the wheel back and forth to seat the bearings.
  2.  
  3. Back off the adjusting nut approximately 90°.
  4.  
  5. Install the lockring by turning the nut to the nearest hole and inserting the dowel pin.
  6.  

The dowel pin must seat in a lockring hole for proper bearing adjustment and wheel retention.

  1. Install the outer locknut and tighten to 50-80 ft. lbs. (67-108 Nm). Final end-play of the wheel on the spindle should be 0.001-0.010 in. (0.025-0.25mm). Bend the locking tab over the nut.
  2.  
  3. Install the drive flange bolts and snapring.
  4.  
  5. Install the grease cap.
  6.  
  7. Remove the safety stands and lower the vehicle.
  8.  



Click image to see an enlarged view

Fig. Fig. 5: Full floating axle, single rear hub assembly-locknut type

DANA F-375, DANA 70 WITHOUT LOCKING HUBS
  1. Raise and support the front end on jackstands.
  2.  
  3. Remove the wheels.
  4.  
  5. Remove the brake drums. See Brakes .
  6.  
  7. Matchmark the drive flange and the hub.
  8.  
  9. Remove the nuts and lcokwashers, then install puller screws using the 2 threaded holes in the flange.
  10.  
  11. Pull the flange from the hub.
  12.  
  13. Remove the hub and bearings.
  14.  
  15. Thoroughly clean and inspect all parts.
  16.  
  17. Pack the wheel bearings and coat the inside of the hubs with wheel bearing grease.
  18.  
  19. Adjust the wheel bearings by turning the inner adjusting nut tightly, then backing it off 1 / 6 of a turn.
  20.  
  21. Install the lockring making sure that the pin on the inner nut enters one of the holes in the lockring. It's okay to move the inner nut slightly to position the pin.
  22.  
  23. Install the outer nut and torque it to 50 ft. lbs. (67 Nm).
  24.  
  25. Install the drive flange, using a new gasket.
  26.  
  27. Coat the flange-to-drum contact surfaces with anti-sieze compound and install the drum.
  28.  
  29. Install the wheel.
  30.  

FULL-TIME 4 WHEEL DRIVE



See Figures 6 through 16

  1. Remove the wheel cover.
  2.  
  3. Remove the cotter pin and loosen the axle shaft nut.
  4.  
  5. Raise and support the front end on jackstands.
  6.  
  7. Remove the wheels.
  8.  
  9. Unbolt the caliper and support it out of the way. DO NOT disconnect the brake line!
  10.  
  11. Remove the inboard brake pad.
  12.  
  13. Remove the axle shaft nut and washer.
  14.  



Click image to see an enlarged view

Fig. Fig. 6: Remove the axle shaft nut and washer

  1. Some models have a hole provided through the rotor to remove the 6 retainer bolts. If so equipped, remove the bolts at this time.
  2.  
  3. Position puller C-4358, or equivalent, over the wheel lugs and install the lug nuts. Tighten the main screw of the puller to remove the hub, bearings, retainer and outer seal as an assembly.
  4.  



Click image to see an enlarged view

Fig. Fig. 7: Bolt-on the special puller to the rotor in order to remove the hub and bearing assembly.



Click image to see an enlarged view

Fig. Fig. 8: Carefully pull the axle hub assembly from the shaft

  1. Spray lubricant on the retainer bolts to loosen them for easy removal. Apply a rag over the axle shaft making sure no dirt enters the area.
  2.  



Click image to see an enlarged view

Fig. Fig. 9: Lubricate bolts with penetrating oil to ease removal



Click image to see an enlarged view

Fig. Fig. 10: Place a rag over the axle shaft making sure no dirt enters the area

  1. Remove the retainer bolts along with the retainer itself.
  2.  



Click image to see an enlarged view

Fig. Fig. 11: Remove the retainer carefully, leaving the protective rag in place

  1. Make sure you scrape any traces of gasket and dirt from both the retainer and the mating area. Clean this area well!
  2.  



Click image to see an enlarged view

Fig. Fig. 12: Remove all traces of the old gasket material

  1. Insert a prybar though the U-joint and wedge the shaft inward as far as it will go. Make sure that it is wedged securely and can't be moved.
  2.  



Click image to see an enlarged view

Fig. Fig. 13: Insert a prybar though the U-joint and wedge the shaft inward as far as it will go-Make sure that it is wedged securely and can't be moved

  1. Remove the bearing spacer and retainer along with the bearing. Clean the retainer and spacer well.
  2.  



Click image to see an enlarged view

Fig. Fig. 14: Remove the retainer and spacer ...



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Fig. Fig. 15: ... then remove and inspect the bearing

To install:
  1. Take the bearing out and replace with a new one making sure you pack it with fresh grease. Scoop the bearing in the palm of your hand with the grease, making sure you have packed it well. All bearing spaces must be filled with grease.
  2.  
  3. Install the hub, rotor and bearing assembly, then torque the retainer bolts to 30 ft. lbs. (41 Nm) in a criss-cross pattern.
  4.  



Click image to see an enlarged view

Fig. Fig. 16: Installing the bearing

  1. Install the brake adapter. Torque the bolts to 85 ft. lbs. (115 Nm).
  2.  
  3. Remove the prybar from the U-joint.
  4.  
  5. Install the axle shaft nut and tighten it to 100 ft. lbs. (135 Nm), then continue tightening it to align the cotter pin holes. Install the cotter pin.
  6.  
  7. Using the lube fitting, fill the knuckle with NLGI, Grade 2, multi-purpose EP grease until the grease is seen flowing through the inner seal.
  8.  
  9. Install the inner brake pad and caliper. See Brakes .
  10.  
  11. Install the wheels and tighten the lug nuts to 110 ft. lbs. (135 Nm).
  12.  

 
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