Jeep Wagoneer/Commando/Cherokee 1984-1998

Front and Rear Axle

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FLUID RECOMMENDATIONS



The standard front and rear axle differentials use SAE 80W/90, API grade GL 5 hypoid gear lubricant. SAE 75W-140 API grade GL 5 hypoid gear lubricant is recommended when trailer towing. With Trac-Lok® (limited slip) differentials, add a container of Trac-Lok® lubricant additive.

FLUID LEVEL CHECK



See Figures 1, 2, 3, 4, 5, 6, 7, 8 and 9



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Fig. Fig. 1: AMC axle fill plug location



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Fig. Fig. 2: Loosen the front axle drain plug



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Fig. Fig. 3: Remove the front axle drain plug



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Fig. Fig. 4: If necessary, add the proper amount of gear oil



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Fig. Fig. 5: Loosen the rear axle drain plug



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Fig. Fig. 6: Remove the rear axle drain plug, the oil should start to run out



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Fig. Fig. 7: If the rear axle housing uses a rubber drain plug, remove it by simply prying it out using a flat bladed prying tool ...



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Fig. Fig. 8: ... then remove it from the housing cover



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Fig. Fig. 9: If necessary, add the proper amount of gear oil

Check the level of the oil in the differential housing every 7,500 miles (12,000 km) under normal driving conditions, and every 3,000 miles (4,800 km) 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, add fluid to obtain an acceptable level.

The differential housing fill hole plug may be a hexagonal plug that is removable using the appropriate sized box wrench or socket, a plug with a square drive hole in it suitable for a3/8inch drive ratchet or a rubber plug that can be removed simply by using a small, flat bladed tool.

DRAIN & REFILL



See Figures 10, 11, 12, 13, 14 and 15

The lubricant should be changed every 30,000 miles (48,000 km). Under severe conditions, the lubricant should be changed every 12,000 miles (19,000 km). If running in deep water, change the lubricant daily.

Follow the procedure given below for changing the lubricant in the front and rear axle differentials:



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Fig. Fig. 10: Clean the axle housing cover perimeter using a wire brush



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Fig. Fig. 11: Remove the axle housing cover bolts

  1. Raise the vehicle and safely support it with jackstands.
  2.  
  3. Place a large pan under the diferential housing.
  4.  
  5. Using a ratchet with a 30mm socket, remove the axle differential housing cover bolts and allow the lubricant to completely drain out.
  6.  
  7. Utilizing a flat scraper tool, clean the axle housing-to-cover mating surface of all old gasket material.
  8.  
  9. Thoroughly clean the axle housing cover, especially the gasket sealing surface.
  10.  
  11. After thoroughly cleaning the axle cover, apply gasket sealer around the mating surface of the cover and on the inner portion of the mounting bolt holes.
  12.  
  13. Install the differential housing cover with a new gasket.
  14.  

Some rear axle covers are not equipped with a gasket. If a gasket is not used, seal the cover using RTV sealant.



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Fig. Fig. 12: Let the fluid drain completely from the axle



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Fig. Fig. 13: Using a flat scraper, clean the axle housing gasket mating surface of all old gasket material before installing the hoiusing cover



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Fig. Fig. 14: Thoroughly clean the axle housing cover, especially the gasket sealing surface



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Fig. Fig. 15: Apply a gasket sealer around the mating surface of the cover and on the inner portion of the mounting bolt holes

  1. Tighten the cover attaching bolts to 15-25 ft. lbs. (20-33 Nm).
  2.  

The differential housing fill hole plug may be a hexagonal plug that is removable using the appropriate sized box wrench or socket, a plug with a square drive hole in it suitable for a3/8inch drive ratchet or a rubber plug that can be removed simply by using a small, flat bladed tool.

  1. Remove the fill plug and add new lubricant to the fill hole level.
  2.  
  3. Replace the fill plug.
  4.  
  5. Lower the vehicle.
  6.  

Trac-Lok® (limited-slip) differentials may be cleaned only by disassembling the unit and wiping with clean, lint-free rags. Use no chemical solvents or compressed air.

 
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