Transfer Cases

The Wrangler YJ was produced with two different transfer cases: the New Process 207 (NP207) and the New Process 231 (NP231). The 1987 Wrangler YJ came with the NP207 primarily because there was a surplus of them when Chrysler took over the Jeep brand. Up until this point, the NP207 was used exclusively in the 1984-87 Cherokee XJ. From 1988 to 1995, the Wrangler YJ was outfitted with the NP231 transfer case.

NP207 Transfer CaseThe NP207 has an aluminum case. It is similar in appearance to the NP231, but should have a tag (facing the rear of the vehicle) that's stamped New Process Gear Model 207. The NP207 is chain driven. Models mated to a manual transmission have a 21-spline input shaft. Models mated to an automatic transmission have a 23-spline input shaft. The output for the front driveshaft is on the driver's side. The ratio for high-range is a direct drive 1:1 while low-range is 2.61:1. This transfer case is unpopular due to its weakness when used in modified Wranglers for off-road. Many of the NP207 transfer cases have been swapped out in favor of the NP231 transfer case.

NP231 Transfer CaseThe NP231 has an aluminum case. Conversely, it is similar in appearance to the NP207, but should have a tag (facing the rear of the vehicle) that's stamped New Process Gear Model 231. The NP231 is chain driven. Models mated to the Peugeot BA-10 or Aisin-Warner AX-5 transmission have a 21-spline input shaft. Models mated to the Aisin-Warner AX-15 transmission have a 23-spline input shaft. The output for the front driveshaft is on the driver's side. The ratio for high-range is a direct drive 1:1 while low-range is 2.72:1. This transfer case is widely supported in the off-road community due to its strength and ease for upgrading it with parts made by many third-party companies.

Transfer Case, Remanufactured Transfercase NP231J  231 Jeep Wrangler TJ LJ LIFT

Transfer Case, Remanufactured Transfercase NP231J 231 Jeep Wrangler TJ LJ LIFT

$675.00
Omix-Ada 18676.28 Transfer Case Mainshaft Bushing Fits 87-95 Wrangler (YJ)

Omix-Ada 18676.28 Transfer Case Mainshaft Bushing Fits 87-95 Wrangler (YJ)

$24.63
Omix-Ada 18676.26 Transfer Case Shift Fork Fits 87-93 Wrangler (YJ)

Omix-Ada 18676.26 Transfer Case Shift Fork Fits 87-93 Wrangler (YJ)

$62.75
Omix-Ada 18676.29 Transfer Case Output Seal Fits 87-95 Wrangler (YJ)

Omix-Ada 18676.29 Transfer Case Output Seal Fits 87-95 Wrangler (YJ)

$20.71
Omix-Ada 18676.44 Transfer Case Maindrive Sprocket Bearing Fits Wrangler (YJ)

Omix-Ada 18676.44 Transfer Case Maindrive Sprocket Bearing Fits Wrangler (YJ)

$32.86
Omix-Ada 18676.14 Transfer Case Vacuum Switch Fits 87-93 Wrangler (YJ)

Omix-Ada 18676.14 Transfer Case Vacuum Switch Fits 87-93 Wrangler (YJ)

$73.45
Omix-Ada 18676.37 Transfer Case Yoke Fits 87-95 Wrangler (YJ)

Omix-Ada 18676.37 Transfer Case Yoke Fits 87-95 Wrangler (YJ)

$53.50
Jeep Wrangler YJ NP231 Transfer case Shifter 87-95 New Process AX5 manual trans

Jeep Wrangler YJ NP231 Transfer case Shifter 87-95 New Process AX5 manual trans

$50.00
JEEP Wrangler  TJ  OEM  Factory Transfer Case Shifter Lever  NP231  4x4  97-06

JEEP Wrangler TJ OEM Factory Transfer Case Shifter Lever NP231 4x4 97-06

$22.50
Crown Automotive 83502855 Transfer Case Slip Yoke Fits 87-95 Wrangler (YJ)

Crown Automotive 83502855 Transfer Case Slip Yoke Fits 87-95 Wrangler (YJ)

$57.88
Omix-Ada 18676.49 Transfer Case Mode Shift Fork Bushing Fits 87-95 Wrangler (YJ)

Omix-Ada 18676.49 Transfer Case Mode Shift Fork Bushing Fits 87-95 Wrangler (YJ)

$23.33
1997-01-02-03-04-06 Jeep Wrangler TJ NP231 Transfer case Shift Collar Gear

1997-01-02-03-04-06 Jeep Wrangler TJ NP231 Transfer case Shift Collar Gear

$45.04
97-99-03-04-05-06 Jeep TJ Wrangler NP231J Transfer Case Front Output Gear Shaft

97-99-03-04-05-06 Jeep TJ Wrangler NP231J Transfer Case Front Output Gear Shaft

$49.04
Rubicon Express RE2100 Transfer Case Lowering Kit TJ Wrangler (TJ) Wrangler (YJ)

Rubicon Express RE2100 Transfer Case Lowering Kit TJ Wrangler (TJ) Wrangler (YJ)

$51.32
Omix-Ada 18612.02 Transfer Case Drive Chain Fits Cherokee (XJ) Wrangler (YJ)

Omix-Ada 18612.02 Transfer Case Drive Chain Fits Cherokee (XJ) Wrangler (YJ)

$128.30
Transfer Case Slip-Yoke Eliminator Kit 87-06 Wrangler with NP231 Transfer Case

Transfer Case Slip-Yoke Eliminator Kit 87-06 Wrangler with NP231 Transfer Case

$210.99
97-02 Jeep Wrangler TJ 6 cylinder 4.0 NP 231 J transfer case shifter handle, TJ3

97-02 Jeep Wrangler TJ 6 cylinder 4.0 NP 231 J transfer case shifter handle, TJ3

$15.76
Jeep Wrangler TJ, NP231J, 23 Spline Transfer Case, Long Input, JL1

Jeep Wrangler TJ, NP231J, 23 Spline Transfer Case, Long Input, JL1

$269.10
Pro Comp Suspension TailShaft Conversion Kit 87-95 Wrangler YJ Transfer Case ic

Pro Comp Suspension TailShaft Conversion Kit 87-95 Wrangler YJ Transfer Case ic

$335.21
JEEP WRANGLER YJ CHEROKEE XJ TRANSFER CASE VACUUM SWITCH SEE DESC

JEEP WRANGLER YJ CHEROKEE XJ TRANSFER CASE VACUUM SWITCH SEE DESC

$32.90

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