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.

JEEP WRANGLER YJ NP 231 J TRANSFER CASE  23  spline Short input 6 cyl stan 90-95

JEEP WRANGLER YJ NP 231 J TRANSFER CASE 23 spline Short input 6 cyl stan 90-95

$395.00
OEM Jeep Wrangler YJ Transfer case 4x4 Shifter Shift Assembly automatic 0335

OEM Jeep Wrangler YJ Transfer case 4x4 Shifter Shift Assembly automatic 0335

$44.99
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

$63.63
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

$54.09
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
ALLOY USA 11650 TRANSFER CASE CHAIN NP231 JEEP GRAND CHEROKEE WRANGLER

ALLOY USA 11650 TRANSFER CASE CHAIN NP231 JEEP GRAND CHEROKEE WRANGLER

$74.96
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

$79.38
1987-95 JEEP YJ WRANGLER NP231 TRANSFER CASE SHIFTER BRACKET BRACE MOUNT OEM

1987-95 JEEP YJ WRANGLER NP231 TRANSFER CASE SHIFTER BRACKET BRACE MOUNT OEM

$40.00
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
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)

$95.99
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)

$110.99
JEEP WRANGLER YJ 87-95 2.5L 4 CYL AX5 NP 231 TRANSFER CASE SHIFTER 4X4 OEM NICE

JEEP WRANGLER YJ 87-95 2.5L 4 CYL AX5 NP 231 TRANSFER CASE SHIFTER 4X4 OEM NICE

$50.00
JEEP WRANGLER TJ 97-02 TUB MOUNT TRANSFER CASE PIVOT MOUNT BRACKET OEM NP 231

JEEP WRANGLER TJ 97-02 TUB MOUNT TRANSFER CASE PIVOT MOUNT BRACKET OEM NP 231

$20.00
Jeep Wrangler YJ   NP 231 J  Transfer Case 272 ratio 21 spline Short input

Jeep Wrangler YJ NP 231 J Transfer Case 272 ratio 21 spline Short input

$178.75
Jeep Wrangler TJ Transfer Case Shifter, Lever Assembly. NP231.  97-02  OEM

Jeep Wrangler TJ Transfer Case Shifter, Lever Assembly. NP231. 97-02 OEM

$35.99
Jeep Wrangler TJ   NP231 Transfer case Drive Chain.   OEM

Jeep Wrangler TJ NP231 Transfer case Drive Chain. OEM

$39.99
Jeep Wrangler YJ NP231 Transfer case Planetary Gear.   21 spline. OEM

Jeep Wrangler YJ NP231 Transfer case Planetary Gear. 21 spline. OEM

$110.00
Jeep Wrangler TJ Transfercase NP231 5sp 2.5L Manual 97-02 4 cylinder transfer e

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

$299.95
Jeep Wrangler TJ Transfercase NP231 5sp 4.0L Manual Automatic 97-02 transfer 97j

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

$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)

$65.05

« Previous12345