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.

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

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

$59.40
G2 Axle and Gear 37-231 Transfer Case Kit Fits 87-94 Cherokee (XJ) Wrangler (YJ)

G2 Axle and Gear 37-231 Transfer Case Kit Fits 87-94 Cherokee (XJ) Wrangler (YJ)

$103.99
G2 Axle and Gear 37-231FF Transfer Case Kit Fits 94-95 Wrangler (YJ)

G2 Axle and Gear 37-231FF Transfer Case Kit Fits 94-95 Wrangler (YJ)

$119.99
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)

$15.52
Omix-Ada 18676.37 Transfer Case Yoke Fits 87-95 Wrangler (YJ)

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

$51.04
JEEP WRANGLER TJ  97-03  NP 231 J TRANSFER CASE 23 Spline Long Input FREE SHIP

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

$345.00
Transfer Case, Reman, with SYE Kit NP231J 231 Jeep Wrangler lift TJ LJ XJ

Transfer Case, Reman, with SYE Kit NP231J 231 Jeep Wrangler lift TJ LJ XJ

$950.00
Jeep Wrangler TJ NP231 J Transfer Case Parts Drive Chain OEM Collar Half Rear Al

Jeep Wrangler TJ NP231 J Transfer Case Parts Drive Chain OEM Collar Half Rear Al

$40.50
Jeep Wrangler YJ NP231 J Transfer Case Oil Pump Tube Connector OEM 87-95

Jeep Wrangler YJ NP231 J Transfer Case Oil Pump Tube Connector OEM 87-95

$25.99
Jeep Wrangler YJ NP231 J Transfer Case Input Shaft Bearing Retainer OE

Jeep Wrangler YJ NP231 J Transfer Case Input Shaft Bearing Retainer OE

$39.99
Jeep Wrangler YJ NP231J Transfer Case Snap Ring Planetary Carrier OEM

Jeep Wrangler YJ NP231J Transfer Case Snap Ring Planetary Carrier OEM

$11.99
Jeep Wrangler YJ NP231J Transfer Case Bearing Retaining Ring OEM

Jeep Wrangler YJ NP231J Transfer Case Bearing Retaining Ring OEM

$11.99
Jeep Wrangler YJ NP231 J Transfer Case Strut Retaining Plate OEM 87-95

Jeep Wrangler YJ NP231 J Transfer Case Strut Retaining Plate OEM 87-95

$14.99
Jeep Wrangler YJ NP231 J Transfer Case Thrust Ring Washer Tab OEM 87-95

Jeep Wrangler YJ NP231 J Transfer Case Thrust Ring Washer Tab OEM 87-95

$14.99
Rubicon Express RE2100 Transfer Case Lowering Kit Fits 87-02 Wrangler YJ/TJ/LJ

Rubicon Express RE2100 Transfer Case Lowering Kit Fits 87-02 Wrangler YJ/TJ/LJ

$44.95
Crown Automotive 83502855 Transfer Case Slip Yoke Fits 87-95 Wrangler (YJ)

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

$63.34
FITS 94-95 WRANGLER 94-96 CHEROKEE 4.0L W/NP231 TRANSFER CASE HOUSING EXTENSION

FITS 94-95 WRANGLER 94-96 CHEROKEE 4.0L W/NP231 TRANSFER CASE HOUSING EXTENSION

$52.67
Rough Country Transfer Case Lowering Kit Jeep Wrangler YJ 4WD 1622TC

Rough Country Transfer Case Lowering Kit Jeep Wrangler YJ 4WD 1622TC

$54.95
Transfer Case Mounting Stud Kit (6) NP 231 241 247 208 Jeep Wrangler  TJ XJ YJ

Transfer Case Mounting Stud Kit (6) NP 231 241 247 208 Jeep Wrangler TJ XJ YJ

$21.82
Transfer Case Slip Yoke Eliminator Seal Kit-NP231 Yoke SYE Kit fits Wrangler

Transfer Case Slip Yoke Eliminator Seal Kit-NP231 Yoke SYE Kit fits Wrangler

$70.81

« Previous12345