Jeep Wrangler, TJ (USA / CAN)

Transfer case fluid capacity & service interval

Jeep Wrangler, TJ (USA / CAN) transfer case fluid capacity ranges from 1 to 2 liters. Service intervals include checks at 30000 km/30 months or 30000 miles, and fluid changes at 120000 km/120 months, 60000 miles, 60000 miles/48 months, or 30000 miles. The data covers 12 configurations.

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

TypeSpecifications
Wrangler 2.4 (USA) (2002-2006)
  • Use: Normal
  • Capacity 1 liter
  • Check 30000 km/ 30 months
  • Change 120000 km/ 120 months
  • Code: NV 231
Wrangler 2.4 (USA) (2002-2006)
  • Use: Severe
  • Capacity 1 liter
  • Check 30000 miles
  • Change 60000 miles
  • Code: NV 231
Wrangler 2.4 (USA) (2002-2006)
  • Use: Normal
  • Capacity 2 liter
  • Check 30000 km/ 30 months
  • Change 120000 km/ 120 months
  • Code: NV 241
Wrangler 2.4 (USA) (2002-2006)
  • Use: Severe
  • Capacity 2 liter
  • Check 30000 miles
  • Change 60000 miles
  • Code: NV 241
Wrangler 4.0 (USA) (2002-2006)
  • Use: Normal
  • Capacity 1 liter
  • Check 30000 km/ 30 months
  • Change 120000 km/ 120 months
  • Code: NV 231
Wrangler 4.0 (USA) (2002-2006)
  • Use: Severe
  • Capacity 1 liter
  • Check 30000 miles
  • Change 60000 miles
  • Code: NV 231
Wrangler 4.0 (USA) (2002-2006)
  • Use: Normal
  • Capacity 2 liter
  • Check 30000 km/ 30 months
  • Change 120000 km/ 120 months
  • Code: NV 241
Wrangler 4.0 (USA) (2002-2006)
  • Use: Severe
  • Capacity 2 liter
  • Check 30000 miles
  • Change 60000 miles
  • Code: NV 241
Wrangler 2.5 (USA) (1997-2002)
  • Use: Normal
  • Capacity 1,2 liter
  • Change 60000 miles/ 48 months
  • Code: NV 231
Wrangler 2.5 (USA) (1997-2002)
  • Use: Severe
  • Capacity 1,2 liter
  • Change 30000 miles
  • Code: NV 231
Wrangler 4.0 (USA) (1997-2002)
  • Use: Normal
  • Capacity 1,2 liter
  • Change 60000 miles/ 48 months
  • Code: NV 231
Wrangler 4.0 (USA) (1997-2002)
  • Use: Severe
  • Capacity 1,2 liter
  • Change 30000 miles
  • Code: NV 231

Additional Notes

  • The Jeep Wrangler TJ in 2.5 and 4.0 configurations for 1997-2002 shares an identical transfer case fluid capacity of 1.2 liters across both engine variants, indicating no differentiation in transfer case unit size between those two powertrains during that generation.
  • For the 1997-2002 2.5 and 4.0 models under normal use conditions, the fluid change interval is set at 60,000 miles or 48 months, whichever comes first, combining both a distance and a time-based threshold.
  • Under severe use conditions, the 1997-2002 2.5 and 4.0 configurations specify a change interval of 30,000 miles with no accompanying time limit, cutting the normal-use mileage interval in half.
  • The 2002-2006 2.4 and 4.0 configurations each list two distinct transfer case capacities — 1 liter and 2 liters — suggesting two different transfer case units were fitted to those engine variants during that period.
  • Both the 1-liter and 2-liter capacity variants on the 2002-2006 models carry identical normal-use service intervals: a fluid check at 30,000 km or 30 months and a fluid change at 120,000 km or 120 months.
  • Under severe use conditions, the 2002-2006 2.4 and 4.0 models specify a change interval of 60,000 miles for both the 1-liter and 2-liter capacity variants, with no time-based limit listed alongside the mileage figure.
  • The severe-use check interval for the 2002-2006 configurations is stated as 30,000 miles, expressed in miles rather than kilometers, while the normal-use intervals for the same configurations are expressed in kilometers and months.
  • Comparing the 1997-2002 and 2002-2006 generations, the normal-use change interval shifts from a miles-and-months combined threshold to a kilometers-and-months combined threshold, reflecting a change in how service schedules were expressed across those model year groups.

Other Systems