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 NP242 Transfer Case Output Shaft Seal and Wrangler TJ NP231 1997-02

Jeep NP242 Transfer Case Output Shaft Seal and Wrangler TJ NP231 1997-02

$14.99
Transfer Case Linkage Drop Bracket; 87-95 Jeep Wrangler YJ

Transfer Case Linkage Drop Bracket; 87-95 Jeep Wrangler YJ

$16.99
NP231J 23 Spline, Transfer Case, 6cyl Long Input Automatic Jeep Wrangler YJ, D2

NP231J 23 Spline, Transfer Case, 6cyl Long Input Automatic Jeep Wrangler YJ, D2

$290.00
Jeep XJ Cherokee YJ Wrangler NP207 & 231C Transfer Case Chain

Jeep XJ Cherokee YJ Wrangler NP207 & 231C Transfer Case Chain

$121.99
Transfer Case Lowering Kit; 87-06 Jeep Wrangler YJ/TJ

Transfer Case Lowering Kit; 87-06 Jeep Wrangler YJ/TJ

$32.99
Transfer Case Chain; 84-06 Jeep Cherokee/Wrangler XJ/WJ/YJ/TJ

Transfer Case Chain; 84-06 Jeep Cherokee/Wrangler XJ/WJ/YJ/TJ

$66.99
JEEP WRANGLER YJ 91-95 4X4 TRANSFER CASE SHIFTER AX15 4.0 6 CYL 5 SPEED OEM

JEEP WRANGLER YJ 91-95 4X4 TRANSFER CASE SHIFTER AX15 4.0 6 CYL 5 SPEED OEM

$65.00
87-95 Jeep Wrangler YJ 1-5/8

87-95 Jeep Wrangler YJ 1-5/8" Transfer Case Drop Kit #J5003

$41.95
TRANSFER CASE OUT OF A 1992 JEEP WRANGLER 4.0L WITH 116,371 MILES

TRANSFER CASE OUT OF A 1992 JEEP WRANGLER 4.0L WITH 116,371 MILES

$299.00
Rubicon Express RE2100 Transfer Case Lowering Kit TJ Wrangler (TJ) Wrangler (YJ)

Rubicon Express RE2100 Transfer Case Lowering Kit TJ Wrangler (TJ) Wrangler (YJ)

$44.99
Transfer Case Mount; 71-91 Jeep CJ/Wrangler YJ

Transfer Case Mount; 71-91 Jeep CJ/Wrangler YJ

$6.98
Transfer Case Shift Fork Pad Set, NP231; 87-90 Jeep Wrangler

Transfer Case Shift Fork Pad Set, NP231; 87-90 Jeep Wrangler

$3.23
*NEW* 1987-06 JEEP WRANGLER YJ TJ TRANSFER CASE SHIFT KNOB INSERT

*NEW* 1987-06 JEEP WRANGLER YJ TJ TRANSFER CASE SHIFT KNOB INSERT

$6.95
Omix-Ada 18676.28 Transfer Case Mainshaft Bushing Fits 87-95 Wrangler (YJ)

Omix-Ada 18676.28 Transfer Case Mainshaft Bushing Fits 87-95 Wrangler (YJ)

$11.99
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)

$6.99
97-98-99-2000-01-02 Jeep Wrangler TJ 2.5 Manual Trans. NP231J  Transfer Case

97-98-99-2000-01-02 Jeep Wrangler TJ 2.5 Manual Trans. NP231J Transfer Case

$325.01
Jeep Cherokee Wrangler 1987-1996 NP231 Transfer Case Replacement Chain

Jeep Cherokee Wrangler 1987-1996 NP231 Transfer Case Replacement Chain

$109.00
86-96 WRANGLER (YJ SERIES) TRANSFER CASE

86-96 WRANGLER (YJ SERIES) TRANSFER CASE

$106.82
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)

$40.35
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)

$38.50

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