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.

4x4 shifter Jeep Wrangler 231 transfer case YJ 2.5 AX5 5 speed trans stick 87-95

4x4 shifter Jeep Wrangler 231 transfer case YJ 2.5 AX5 5 speed trans stick 87-95

$40.00
Vacuum Switch NP231 Transfer Case 53001101 for Jeep Dodge Pickup Truck 4WD

Vacuum Switch NP231 Transfer Case 53001101 for Jeep Dodge Pickup Truck 4WD

$24.95
Jeep Wrangler TJ YJ TRANSFER CASE NUTS 87-02

Jeep Wrangler TJ YJ TRANSFER CASE NUTS 87-02

$3.95
NP231 Transfer Case Shift Linkage For Jeep CJ YJ TJ 87 To 01 Wrangler  5014148AA

NP231 Transfer Case Shift Linkage For Jeep CJ YJ TJ 87 To 01 Wrangler 5014148AA

$11.05
Shift Range Sleeve 91 To 95 For Jeep YJ Wrangler NP231 Transfer Case Cr 4796906

Shift Range Sleeve 91 To 95 For Jeep YJ Wrangler NP231 Transfer Case Cr 4796906

$70.20
1997-2002 Jeep Wrangler NP-231J Transfer Case 23 Spline / 1.550

1997-2002 Jeep Wrangler NP-231J Transfer Case 23 Spline / 1.550" Shaft #52099365

$359.95
87-95 Jeep Wrangler Yoke Front Output Shaft NP231 Transfer Case 26 Spline OEM YJ

87-95 Jeep Wrangler Yoke Front Output Shaft NP231 Transfer Case 26 Spline OEM YJ

$39.99
Jeep Wrangler YJ  87-95  Transfer Case Shifter Automatic  NP231  4.0 / 2.5 Tcase

Jeep Wrangler YJ 87-95 Transfer Case Shifter Automatic NP231 4.0 / 2.5 Tcase

$49.99
JEEP WRANGLER YJ 87-95 WITH NP231 TRANSFER CASE FRONT SHAFT YOKE

JEEP WRANGLER YJ 87-95 WITH NP231 TRANSFER CASE FRONT SHAFT YOKE

$49.90
JEEP WRANGLER TJ 97-03 NP 231J TRANSFER CASE 23 Spline Long Input Auto FREE SHIP

JEEP WRANGLER TJ 97-03 NP 231J TRANSFER CASE 23 Spline Long Input Auto FREE SHIP

$299.99
Jeep Wrangler TJ Transfercase NP231 5sp 2.5L Manual 97-02 4 cyl transfer 99o

Jeep Wrangler TJ Transfercase NP231 5sp 2.5L Manual 97-02 4 cyl transfer 99o

$349.95
Jeep Wrangler TJ NP231 Transfercase Front Output Gear Shaft 97-06 Transfer Case

Jeep Wrangler TJ NP231 Transfercase Front Output Gear Shaft 97-06 Transfer Case

$49.95
J3241481 Shifter Bushing New for J Series Jeep Wrangler Cherokee CJ7

J3241481 Shifter Bushing New for J Series Jeep Wrangler Cherokee CJ7

$17.96
00-02 JEEP WRANGLER NP 231 Transfer Case IC 507 Automatic Transmission 2.5 4.0

00-02 JEEP WRANGLER NP 231 Transfer Case IC 507 Automatic Transmission 2.5 4.0

$320.89
2003 2004 2005 2006 Jeep Wrangler NV231 Transfer Case  73K

2003 2004 2005 2006 Jeep Wrangler NV231 Transfer Case 73K

$650.00
JEEP WRANGLER YJ 87-95 5 SPEED TRANS & TRANSFER SHIFT KNOB KIT NEW

JEEP WRANGLER YJ 87-95 5 SPEED TRANS & TRANSFER SHIFT KNOB KIT NEW

$29.95
JEEP WRANGLER YJ 87-95 5 SPEED TRANS & TRANSFER SHIFT KNOB KIT NEW WITH NUTS

JEEP WRANGLER YJ 87-95 5 SPEED TRANS & TRANSFER SHIFT KNOB KIT NEW WITH NUTS

$38.95
JEEP WRANGLER YJ 87-95 5 SPEED TRANS & TRANSFER SHIFT BOOT & KNOB KIT WITH NUTS

JEEP WRANGLER YJ 87-95 5 SPEED TRANS & TRANSFER SHIFT BOOT & KNOB KIT WITH NUTS

$89.95
Jeep TJ Wrangler 92k Transfer Case NP231J 2.5L Automatic Transmission 00-02 7872

Jeep TJ Wrangler 92k Transfer Case NP231J 2.5L Automatic Transmission 00-02 7872

$198.00
JEEP WRANGLER YJ 1987-95 5 SPEED TRANS & TRANSFER SHIFT BOOT

JEEP WRANGLER YJ 1987-95 5 SPEED TRANS & TRANSFER SHIFT BOOT

$46.00

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