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.

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

$67.03
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

$53.87
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

$63.29
Jeep Wrangler TJ Transfercase NP231 5sp 2.5L Manual 97-02 4 cylinder transfer f

Jeep Wrangler TJ Transfercase NP231 5sp 2.5L Manual 97-02 4 cylinder transfer f

$359.95
87-95 Jeep wrangler 231 front drive shaft output Yolk YJ transfer case

87-95 Jeep wrangler 231 front drive shaft output Yolk YJ transfer case

$20.00
Jeep Wrangler YJ NP231 J Transfer Case Shift Mode Synchronizer Stop Ring OEM 87-

Jeep Wrangler YJ NP231 J Transfer Case Shift Mode Synchronizer Stop Ring OEM 87-

$48.99
Jeep Wrangler YJ NP231 J Transfer Case Drive Shift Collar Sleeve OEM 87-95 Synch

Jeep Wrangler YJ NP231 J Transfer Case Drive Shift Collar Sleeve OEM 87-95 Synch

$42.99
Jeep Wrangler YJ NP231 J Transfer Case Input Shaft Bearing Retainer OEM 87-95

Jeep Wrangler YJ NP231 J Transfer Case Input Shaft Bearing Retainer OEM 87-95

$39.99
Jeep Wrangler YJ NP231 J Transfer Case Sprocket Drive & Bearings OEM 87-95

Jeep Wrangler YJ NP231 J Transfer Case Sprocket Drive & Bearings OEM 87-95

$39.99
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
Omix-Ada Transfer Case Drive Sprocket NP231 Jeep Wrangler TJ 1997-1999 18676.13

Omix-Ada Transfer Case Drive Sprocket NP231 Jeep Wrangler TJ 1997-1999 18676.13

$101.99
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)

$132.64
JEEP WRANGLER YJ 87-95 NP 231 2.5 4 CYL 21 SPLINE TRANSFER CASE GOOD SHAPE

JEEP WRANGLER YJ 87-95 NP 231 2.5 4 CYL 21 SPLINE TRANSFER CASE GOOD SHAPE

$247.99
2002 Jeep TJ Wrangler NP231 Transfer Case Shifter Lever Linkage 1726

2002 Jeep TJ Wrangler NP231 Transfer Case Shifter Lever Linkage 1726

$45.00
Auto Transmission Transfer Case Shifter Linkage JEEP Wrangler YJ 1993-1995 4cyl

Auto Transmission Transfer Case Shifter Linkage JEEP Wrangler YJ 1993-1995 4cyl

$50.00
1987-1989 WRANGLER W/NP231 T-CASE & VACUUM SWITCH HOLE FRONT HALF TRANSFER CASE

1987-1989 WRANGLER W/NP231 T-CASE & VACUUM SWITCH HOLE FRONT HALF TRANSFER CASE

$222.19
87-90 Jeep Wrangler YJ Transfer Case Disconnect VACUUM HARNESS Wires 53002033

87-90 Jeep Wrangler YJ Transfer Case Disconnect VACUUM HARNESS Wires 53002033

$49.99
Jeep 84-87 XJ Cherokee YJ Wrangler NP 207  23 spline input shaft Transfer case

Jeep 84-87 XJ Cherokee YJ Wrangler NP 207 23 spline input shaft Transfer case

$250.00
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

$114.04

« Previous12345