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)

$55.99
Jeep Wrangler TJ   NP231 Transfer case Drive Chain.   OEM

Jeep Wrangler TJ NP231 Transfer case Drive Chain. OEM

$39.99
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
Alloy USA Transfer Case Chain; 84-06 Jeep Cherokee/Wrangler Xj/Wj/Yj/Tj 11650

Alloy USA Transfer Case Chain; 84-06 Jeep Cherokee/Wrangler Xj/Wj/Yj/Tj 11650

$95.09
Rugged Ridge Transfer Case Linkage Drop Bracket; 87-95 Jeep Wrangler Yj 18305.05

Rugged Ridge Transfer Case Linkage Drop Bracket; 87-95 Jeep Wrangler Yj 18305.05

$28.29
Rugged Ridge Transfer Case Lowering Kit; 87-06 Jeep Wrangler Yj/Tj 18305.10

Rugged Ridge Transfer Case Lowering Kit; 87-06 Jeep Wrangler Yj/Tj 18305.10

$44.19
97-99-03-04-05-06 Jeep TJ Wrangler NP231J Transfer Case Front Output Gear Shaft

97-99-03-04-05-06 Jeep TJ Wrangler NP231J Transfer Case Front Output Gear Shaft

$49.04
Crown Automotive 83502855 Transfer Case Slip Yoke Fits 87-95 Wrangler (YJ)

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

$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)

$68.43
Crown Automotive 83502855 Transfer Case Slip Yoke Fits 87-95 Wrangler (YJ)

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

$62.18
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
Jeep Wrangler TJ NP231 Transfercase Front Output Gear Shaft 97-02 Transfer Case

Jeep Wrangler TJ NP231 Transfercase Front Output Gear Shaft 97-02 Transfer Case

$34.95
Pro Comp Suspension TailShaft Conversion Kit 87-95 Wrangler YJ Transfer Case ic

Pro Comp Suspension TailShaft Conversion Kit 87-95 Wrangler YJ Transfer Case ic

$335.21
JEEP WRANGLER YJ CHEROKEE XJ TRANSFER CASE VACUUM SWITCH SEE DESC

JEEP WRANGLER YJ CHEROKEE XJ TRANSFER CASE VACUUM SWITCH SEE DESC

$32.90
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)

$18.71
Crown Automotive 83502855 Transfer Case Slip Yoke Fits 87-95 Wrangler (YJ)

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

$56.69
00-02 JEEP WRANGLER NP 231 Transfer Case IC 507 Automatic Transmission 2.5 4.0

00-02 JEEP WRANGLER NP 231 Transfer Case IC 507 Automatic Transmission 2.5 4.0

$350.00
Jeep Wrangler YJ 1987-1995 Transfer Case Shifter NP231 NP 231 Ax5

Jeep Wrangler YJ 1987-1995 Transfer Case Shifter NP231 NP 231 Ax5

$45.00
4x4 shifter Jeep Wrangler 231 transfer case YJ 2.5 AX5 5 speed trans stick 87-95

4x4 shifter Jeep Wrangler 231 transfer case YJ 2.5 AX5 5 speed trans stick 87-95

$60.00

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