Jeep CJ/Scrambler 1971-1986 Repair Guide

Axles

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See Figures 1, 2, 3, 4, 5, 6, 7 and 8

FLUID LEVEL CHECK



The standard front and rear axle differentials use SAE 80W/90 gear oil. Either is acceptable for use in the differential housing. Power-Lok® differentials use only Jeep Power-Lok® Lubricant or its equivalent. In Trac-Lok® axles, use any limited slip gear oil meeting SAE 75W/90, 80W/90 or 85W/90 specifications. Check the level of the oil in the differential housing every 5,000 miles under normal driving conditions and every 3,000 miles if the vehicle is used in severe driving conditions. The level should be up to the filler hole. When you remove the filler plug, the oil should start to run out. If it does not, replenish the supply until it does.

The lubricant should be changed every 30,000 miles. If running in deep water, change the lubricant daily.

DRAIN AND REFILL



  1. Remove the axle differential housing cover and allow the lubricant to drain out into a proper container.
  2.  
  3. Install the differential housing cover and a new gasket.
  4.  
  5. Tighten the cover attaching bolts to 15-25 ft. lbs.
  6.  
  7. Remove the fill plug and add new lubricant to the fill hole level.
  8.  
  9. Replace the fill plug.
  10.  

Trac-Lok® (limited-slip) differentials may be cleaned only by disassembling the unit and wiping with clean, lint-free rags.



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Fig. Fig. 1: Remove the rear axle cover retaining bolts, to drain the fluid



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Fig. Fig. 2: Note that the rear axle uses Torx® bolts to retain the cover



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Fig. Fig. 3: Use a ratchet to loosen the rear axle fill plug



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Fig. Fig. 4: remove the filler plug



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Fig. Fig. 5: Fill the axle until fluid just starts to run out of the filler plug opening



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Fig. Fig. 6: Remove the front axle retaining bolts to drain the fluid



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Fig. Fig. 7: With all of the bolts removed the axle fluid will drain out



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Fig. Fig. 8: Use the end of an 1/2 ratchet to remove the front axle filler plug

 
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