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.

2002 Jeep Wrangler TJ 4.0L NP231 transfer case shifter

2002 Jeep Wrangler TJ 4.0L NP231 transfer case shifter

$40.00
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)

$104.68
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

$44.99
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
Rough Country Transfer Case Lowering Kit Jeep Wrangler YJ 4WD 1622TC

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

$48.95
Transfer Case Shift Fork Pad Set Np231 87-90 Jeep Wrangler X 18676.23

Transfer Case Shift Fork Pad Set Np231 87-90 Jeep Wrangler X 18676.23

$3.21
Daystar KJ01008BK Transfer Case Drop Kit Fits 87-02 Wrangler (TJ) Wrangler (YJ)

Daystar KJ01008BK Transfer Case Drop Kit Fits 87-02 Wrangler (TJ) Wrangler (YJ)

$39.20
Daystar KJ01008BK Transfer Case Drop Kit Fits 87-02 Wrangler (TJ) Wrangler (YJ)

Daystar KJ01008BK Transfer Case Drop Kit Fits 87-02 Wrangler (TJ) Wrangler (YJ)

$37.36
JEEP WRANGLER YJ 87-?? TRANSFER CASE SHIFTER ASSEMBLY 4X4 OEM

JEEP WRANGLER YJ 87-?? TRANSFER CASE SHIFTER ASSEMBLY 4X4 OEM

$50.00
DTPLV NP 231 Transfer Case Chain Jeep NEW NP231 Liberty Wrangler

DTPLV NP 231 Transfer Case Chain Jeep NEW NP231 Liberty Wrangler

$64.62
Daystar KJ01008BK Transfer Case Drop Kit Fits 87-02 Wrangler (TJ) Wrangler (YJ)

Daystar KJ01008BK Transfer Case Drop Kit Fits 87-02 Wrangler (TJ) Wrangler (YJ)

$48.82
OEM MOPAR TRANSFER CASE VACUUM HARNESS 87-90 JEEP WRANGLER YJ KANDA #53002033

OEM MOPAR TRANSFER CASE VACUUM HARNESS 87-90 JEEP WRANGLER YJ KANDA #53002033

$60.66
Front Output Yoke 26 Spline NP231 Transfer Case 1310 CV Jeep Wrangler 4798120

Front Output Yoke 26 Spline NP231 Transfer Case 1310 CV Jeep Wrangler 4798120

$49.82
Omix-Ada 18676.25 NP231 Transfer Case Housing Extension for 87-95 Wrangler YJ

Omix-Ada 18676.25 NP231 Transfer Case Housing Extension for 87-95 Wrangler YJ

$52.86
Omix-Ada 18676.14 NP231 Transfer Case Vacuum Switch for 87-93 Jeep Wrangler YJ

Omix-Ada 18676.14 NP231 Transfer Case Vacuum Switch for 87-93 Jeep Wrangler YJ

$70.69
Daystar KJ01008BK Transfer Case Drop Kit Fits 87-02 Wrangler (TJ) Wrangler (YJ)

Daystar KJ01008BK Transfer Case Drop Kit Fits 87-02 Wrangler (TJ) Wrangler (YJ)

$36.68
NP231 Transfercase Shifter AX-5 Wrangler Jeep AX5 87-95 YJ NP 231 Transfer Case

NP231 Transfercase Shifter AX-5 Wrangler Jeep AX5 87-95 YJ NP 231 Transfer Case

$40.00
OMIX-ADA #16580.53 Slip Yoke Np231 87-95 Jeep Wrangler (Yj)

OMIX-ADA #16580.53 Slip Yoke Np231 87-95 Jeep Wrangler (Yj)

$66.30
Alloy USA 11650 -Transfer Case Chain for 84-06 Cherokee/Wrangler XJ/WJ/YJ/TJ

Alloy USA 11650 -Transfer Case Chain for 84-06 Cherokee/Wrangler XJ/WJ/YJ/TJ

$80.49
NP231 Transfer Case Electric Vacuum Switch Jeep 1997-06 Wrangler TJ Cherokee XJ

NP231 Transfer Case Electric Vacuum Switch Jeep 1997-06 Wrangler TJ Cherokee XJ

$22.99

« Previous12345