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.

Wrangler YJ Transfer Case Vacuum Harness 53002033 OEM Mopar 231 87A-K Models

Wrangler YJ Transfer Case Vacuum Harness 53002033 OEM Mopar 231 87A-K Models

$52.99
Rubicon Express RE2100 Transfer Case Lowering Kit TJ Wrangler (TJ) Wrangler (YJ)

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

$58.99
Trailmaster JYTCS Transfer Case Drop Bracket TJ Wrangler (TJ) Wrangler (YJ)

Trailmaster JYTCS Transfer Case Drop Bracket TJ Wrangler (TJ) Wrangler (YJ)

$97.84
Daystar KJ01008BK Transfer Case Drop Kit 87-02 TJ Wrangler (TJ) Wrangler (YJ)

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

$37.44
Rubicon Express RE2100 Transfer Case Lowering Kit TJ Wrangler (TJ) Wrangler (YJ)

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

$46.49
JEEP WRANGLER TJ 05-06 NP231 TRANSFER CASE ONLY 6

JEEP WRANGLER TJ 05-06 NP231 TRANSFER CASE ONLY 6

$600.00
Rubicon Express RE2100 Transfer Case Lowering Kit TJ Wrangler (TJ) Wrangler (YJ)

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

$45.53
Trailmaster JYTCS Transfer Case Drop Bracket TJ Wrangler (TJ) Wrangler (YJ)

Trailmaster JYTCS Transfer Case Drop Bracket TJ Wrangler (TJ) Wrangler (YJ)

$63.03
JEEP WRANGLER YJ 87-95 5 SPD TRANS & TRANSFER SHIFT KNOB KIT NEW WITH LOCK NUTS

JEEP WRANGLER YJ 87-95 5 SPD TRANS & TRANSFER SHIFT KNOB KIT NEW WITH LOCK NUTS

$18.99
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
Crown Automotive 83502855 Transfer Case Slip Yoke 87-95 Wrangler (YJ)

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

$60.45
Crown Automotive 83501389 Transfer Case Output Seal Cherokee (XJ) Wrangler (YJ)

Crown Automotive 83501389 Transfer Case Output Seal Cherokee (XJ) Wrangler (YJ)

$14.45
Crown Automotive 83501389 Transfer Case Output Seal Cherokee (XJ) Wrangler (YJ)

Crown Automotive 83501389 Transfer Case Output Seal Cherokee (XJ) Wrangler (YJ)

$12.70
Crown Automotive 83502855 Transfer Case Slip Yoke 87-95 Wrangler (YJ)

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

$46.99
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
00 01 02 Jeep Wrangler AT NP231 Transfer Case 95K OEM

00 01 02 Jeep Wrangler AT NP231 Transfer Case 95K OEM

$464.15
Transfer Case, NP 231 J, 21 Spline, 4cyl 5-Speed, Jeep Wrangler YJ - 1987-1995

Transfer Case, NP 231 J, 21 Spline, 4cyl 5-Speed, Jeep Wrangler YJ - 1987-1995

$250.00
Jeep NP242 & Wrangler TJ NP231 (1997-02) Transfer Case Output Shaft Seal

Jeep NP242 & Wrangler TJ NP231 (1997-02) Transfer Case Output Shaft Seal

$12.99
18676.25 NP231 Transfer Case Housing Extension, 87-95 Jeep Wrangler (YJ)

18676.25 NP231 Transfer Case Housing Extension, 87-95 Jeep Wrangler (YJ)

$60.70
Rubicon Express RE2100 Transfer Case Lowering Kit TJ Wrangler (TJ) Wrangler (YJ)

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

$56.81

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