Chrysler Full-Size Trucks 1967-1988 Repair Guide

Rear Axle Bearings

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REMOVAL, REPACKING, & INSTALLATION



Dana 60 and 70

See Figures 1 and 2

The wheel bearings on the 200 and 300 series full floating rear axles are packed with wheel bearing grease. Axle lubricant can also flow into the wheel hubs and bearings, however, wheel bearing grease is the primary lubricant.

1967-84 MODELS
  1. Set the parking brake and loosen the axle shaft bolts.
  2.  
  3. Raise the rear wheels off the floor and place jackstands under the rear axle housing so that the axle is parallel with the floor.
  4.  
  5. Remove the axle shaft bolts.
  6.  
  7. Remove the axle shaft and gaskets.
  8.  
  9. With the axle shaft out, remove the gasket from the axle shaft flange studs.
  10.  
  11. Bend the lockwasher tab away from the locknut, and then remove the locknut, lockwasher, and the adjusting nut.
  12.  
  13. Remove the outer bearing cone and pull the wheel straight off the axle.
  14.  
  15. With a piece of hardwood or a brass drift which will just clear the outer bearing cup, drive the inner bearing cone and inner seal out of the wheel hub.
  16.  
  17. Wash all the old grease or axle lubricant out of the wheel hub, using a suitable solvent.
  18.  
  19. Wash the bearing cups and rollers, then inspect them for pitting, galling, and uneven wear patterns. Inspect the roller for end wear.
  20.  
  21. If the bearing cups are to be replaced, drive them out with a brass drift. Install the new cups with a block of wood and hammer or press them in.
  22.  
  23. If the bearing cups are properly seated, a 0.0015 in. (0.038mm) feeler gauge will not fit between the cup and the wheel hub. The gauge should not fit beneath the cup. Check several places to make sure the cups are squarely seated.
  24.  
  25. Pack each bearing cone and roller with a bearing packer or in the manner previously outlined for the front wheel bearings on 2WD trucks. Use a multi-purpose wheel bearing grease.
  26.  
  27. Place the inner bearing cone and roller assembly in the wheel hub. Install a new inner seal in the hub with a seal installation tool.
  28.  
  29. Install the wheel.
  30.  
  31. Install the adjusting nut.
  32.  
  33. While rotating the wheel, tighten the adjusting nut until a slight drag is felt. Then, back off the nut 1 / 6 turn. This should give free rotation and little or no end-play.
  34.  
  35. Install the lockring.
  36.  
  37. Install the outer nut. MAKE SURE THAT THE ADJUSTING NUT DOES NOT TURN WHILE TIGHTENING THE OUTER NUT! Tighten the outer nut to 35-65 ft. lbs. (47-88 Nm).
  38.  
  39. Bend one tab of the lockring inward to secure the adjusting nut and one tab outward to secure the outer nut. These tabs must be bent securely against a flat on each nut.
  40.  
  41. Install the axle shaft and new gasket or seal.
  42.  

1985-88 MODELS
  1. Set the parking brake and loosen the axle shaft bolts.
  2.  
  3. Raise the rear wheels off the floor and place jackstands under the rear axle housing so that the axle is parallel with the floor.
  4.  
  5. Remove the axle shaft bolts.
  6.  
  7. Remove the axle shaft and gaskets.
  8.  



Click image to see an enlarged view

Fig. Fig. 1: Full floating axle, single rear hub assembly-locknut type

  1. With the axle shaft removed, remove the gasket from the axle shaft flange studs.
  2.  
  3. Bend the lockwasher tab away from the locknut, and then remove the locknut, lockwasher, and the adjusting nut.
  4.  
  5. Remove the outer bearing cone and pull the wheel straight off the axle.
  6.  
  7. With a piece of hardwood or a brass drift which will just clear the outer bearing cup, drive the inner bearing cone and inner seal out of the wheel hub.
  8.  
  9. Wash all the old grease or axle lubricant out of the wheel hub, using a suitable solvent.
  10.  



Click image to see an enlarged view

Fig. Fig. 2: Lock wedge position on rear wheel hub

  1. Wash the bearing cups and rollers, then inspect them for pitting, galling, and uneven wear patterns. Inspect the roller for end wear.
  2.  
  3. If the bearing cups are to be replaced, drive them out with a brass drift. Install the new cups with a block of wood and hammer or press them in.
  4.  
  5. If the bearing cups are properly seated, a 0.0015 in. (0.038mm) feeler gauge will not fit between the cup and the wheel hub. The gauge should not fit beneath the cup. Check several places to make sure the cups are squarely seated.
  6.  
  7. Pack each bearing cone and roller with a bearing packer or in the manner previously outlined for the front wheel bearings on 2WD trucks. Use a multi-purpose wheel bearing grease.
  8.  
  9. Place the inner bearing cone and roller assembly in the wheel hub. Install a new inner seal in the hub with a seal installation tool.
  10.  
  11. Install the wheel.
  12.  
  13. Install the adjusting nut.
  14.  
  15. While rotating the wheel, tighten the adjusting nut to 120-140 ft. lbs. (162 Nm-189 Nm).
  16.  
  17. Back off the nut 1 / 3 turn (120°). This will provide 0.001-0.008 in. (.02 Nm-.20 Nm) end-play.
  18.  
  19. Install the lockring onto the spindle keyway.
  20.  
  21. Install the axle shaft and new gasket.
  22.  

 
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