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.

Omix-Ada 18676.17 Transfer Case Shift Fork Fits Wrangler (TJ) Wrangler (YJ)

Omix-Ada 18676.17 Transfer Case Shift Fork Fits Wrangler (TJ) Wrangler (YJ)

$59.43
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)

$17.96
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)

$4.99
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)

$15.80
Jeep Wrangler TJ Transfercase NP231 5sp 4.0L Manual Automatic 97-02 transfer 98i

Jeep Wrangler TJ Transfercase NP231 5sp 4.0L Manual Automatic 97-02 transfer 98i

$299.95
Crown Automotive 83502855 Transfer Case Slip Yoke Fits 87-95 Wrangler (YJ)

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

$67.56
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)

$68.28
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)

$77.89
Omix-Ada 18676.37 Transfer Case Yoke Fits 87-95 Wrangler (YJ)

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

$60.34
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)

$14.37
1999 Jeep Wrangler TJ 4.0L 32RH NP231 transfer case

1999 Jeep Wrangler TJ 4.0L 32RH NP231 transfer case

$175.00
231 Transfer Case Shifter Lever Assembly JEEP Wrangler YJ 1993-1995 4cyl 5 speed

231 Transfer Case Shifter Lever Assembly JEEP Wrangler YJ 1993-1995 4cyl 5 speed

$67.50
JEEP WRANGLER TRANSFER CASE MANUAL TRANS NP 231 1993 94 95

JEEP WRANGLER TRANSFER CASE MANUAL TRANS NP 231 1993 94 95

$399.59
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
Crown Automotive 83502855 Transfer Case Slip Yoke Fits 87-95 Wrangler (YJ)

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

$55.87
Crown Automotive 83502855 Transfer Case Slip Yoke Fits 87-95 Wrangler (YJ)

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

$65.05
Crown Automotive 83502855 Transfer Case Slip Yoke Fits 87-95 Wrangler (YJ)

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

$59.60
1997-99 Jeep Wrangler NP231 231 Transfer Case Assembly 34,000 Miles 52099211

1997-99 Jeep Wrangler NP231 231 Transfer Case Assembly 34,000 Miles 52099211

$799.99
JEEP WRANGLER  TRANSFER CASE REMAN 1991-2006 231J TRANSFERCASE

JEEP WRANGLER TRANSFER CASE REMAN 1991-2006 231J TRANSFERCASE

$595.00
Omix-Ada 18676.23 Transfer Case Shift Fork Pad Set For 87-90 Wrangler (YJ)

Omix-Ada 18676.23 Transfer Case Shift Fork Pad Set For 87-90 Wrangler (YJ)

$14.00

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