Jeep Wrangler / CJ-7 / CJ-8, YJ (USA / CAN)

Differential fluid capacity & service interval

Jeep Wrangler / CJ-7 / CJ-8, YJ (USA / CAN) differential fluid capacity ranges from 1,2 to 1,7 liters. The data covers 11 configurations.

The configuration chart below lists fill volumes and service intervals for each engine and trim variant.

TypeSpecifications
  • Wrangler 2.5 (USA) (1994-1997)
  • Front
  • Use: Normal
  • Capacity 1,7 liter
  • Code: (4x4)
  • Wrangler 2.5 (USA) (1994-1997)
  • Rear
  • Use: Normal
  • Capacity 1,6 liter
  • Wrangler 4.0 (USA) (1994-1997)
  • Front
  • Use: Normal
  • Capacity 1,7 liter
  • Code: (4x4)
  • Wrangler 4.0 (USA) (1994-1997)
  • Rear
  • Use: Normal
  • Capacity 1,6 liter
  • Wrangler 2.5 (USA) (1987-1993)
  • Front
  • Use: Normal
  • Capacity 1,2 liter
  • Code: (4x4)
  • Wrangler 2.5 (USA) (1987-1993)
  • Rear
  • Use: Normal
  • Capacity 1,2 liter
  • Wrangler 4.2 (USA) (1987-1993)
  • Front
  • Use: Normal
  • Capacity 1,2 liter
  • Code: (4x4)
  • Wrangler 4.2 (USA) (1987-1993)
  • Rear
  • Use: Normal
  • Capacity 1,2 liter
  • CJ-7 / CJ-8 (USA) (1985-1987)
  • Front
  • Use: Normal
  • Capacity 1,2 liter
  • CJ-7 / CJ-8 (USA) (1985-1987)
  • Rear
  • Use: Normal
  • Capacity 1,2 liter
  • CJ-7 / CJ-8 (USA) (1985-1987)
  • Rear, with trailer towing package
  • Use: Normal
  • Capacity 1,2 liter

Additional Notes

  • The Jeep Wrangler / CJ-7 / CJ-8, YJ differential fluid specifications cover front and rear axle fills across multiple engine variants and model year groups spanning 1985-1997.
  • The CJ-7 / CJ-8 (USA) from 1985-1987 carries a uniform 1.2-liter capacity across the front differential, rear differential, and the rear differential equipped with a trailer towing package, indicating all three share the same axle housing volume under normal use conditions.
  • The rear differential with the trailer towing package on the 1985-1987 CJ-7 / CJ-8 (USA) retains the same 1.2-liter fill as the standard rear axle, meaning the towing package does not alter the differential housing size or fluid requirement.
  • Both the Wrangler 2.5 and 4.2 in their 1987-1993 (USA) forms share a 1.2-liter capacity for both front and rear differentials under normal use, placing them in the same fill class as the earlier CJ-7 / CJ-8 axles.
  • A capacity increase is recorded for the 1994-1997 Wrangler 2.5 (USA), where the front differential rises to 1.7 liters and the rear differential to 1.6 liters, both higher than the 1.2-liter figures seen in the 1987-1993 generation of the same engine variant.
  • The Wrangler 4.0 (USA) from 1994-1997 shares the same front differential capacity of 1.7 liters and rear differential capacity of 1.6 liters as the 1994-1997 Wrangler 2.5 (USA), indicating both engine variants used the same axle assemblies during that period.
  • The asymmetry between front and rear differential capacities in the 1994-1997 Wrangler models, 1.7 liters at the front versus 1.6 liters at the rear, reflects a physical difference in axle housing volume between the two ends of the drivetrain.
  • All specifications across the 1985-1997 range are designated for normal use conditions, with no severe-use interval or capacity variant listed for any configuration.

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