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 CHEROKEE NP231 NP-231 TRANSFER CASE GEAR SHIFT CONTROL ROD NEW OEM

JEEP WRANGLER CHEROKEE NP231 NP-231 TRANSFER CASE GEAR SHIFT CONTROL ROD NEW OEM

$49.99
Crown Automotive 83502855 Transfer Case Slip Yoke Fits 87-95 Wrangler (YJ)

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

$61.13
Jeep Wrangler YJ, Transfer Case Shift Knob, Shifter Knob, 008226

Jeep Wrangler YJ, Transfer Case Shift Knob, Shifter Knob, 008226

$9.60
New Repacement Transfer Case Chain 11650 NP231/NP233 Jeep Wrangler Cherokee 027

New Repacement Transfer Case Chain 11650 NP231/NP233 Jeep Wrangler Cherokee 027

$67.65
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
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)

$37.68
Jeep Wrangler YJ NP231 Transfercase Shift Drive Collar Gear 87-95 Transfer Case

Jeep Wrangler YJ NP231 Transfercase Shift Drive Collar Gear 87-95 Transfer Case

$34.95
1989 89 1990 90 Jeep Wrangler Transfer Case 4 Cyl NP231

1989 89 1990 90 Jeep Wrangler Transfer Case 4 Cyl NP231

$432.00
Transfer Case Gasket & Seal Kit NP231 JEEP (except Liberty) 1987-2006 (TSK-231J)

Transfer Case Gasket & Seal Kit NP231 JEEP (except Liberty) 1987-2006 (TSK-231J)

$19.95
Jeep Wrangler YJ, Transfer Case Shift Knob, Shifter Knob, 008249

Jeep Wrangler YJ, Transfer Case Shift Knob, Shifter Knob, 008249

$9.60
87-90 JEEP WRANGLER 4.2 6 cyl AUTO TRANS TRANSFER CASE FLOOR SHIFTER ASSEMBLY

87-90 JEEP WRANGLER 4.2 6 cyl AUTO TRANS TRANSFER CASE FLOOR SHIFTER ASSEMBLY

$100.00
Jeep Wrangler TJ YJ TRANSFER CASE NUT AND BOLT 87-02

Jeep Wrangler TJ YJ TRANSFER CASE NUT AND BOLT 87-02

$4.95
Jeep Wrangler TJ YJ TRANSFER CASE NUTS 87-02

Jeep Wrangler TJ YJ TRANSFER CASE NUTS 87-02

$3.95
Jeep Wrangler YJ, Transfer Case Shift Knob, Shifter Knob, 002477

Jeep Wrangler YJ, Transfer Case Shift Knob, Shifter Knob, 002477

$3.00
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)

$38.91
Jeep Wrangler TJ Transfer Case NP 231 J  4.0L 5spd.  97-00   OEM

Jeep Wrangler TJ Transfer Case NP 231 J 4.0L 5spd. 97-00 OEM

$399.00
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
Jeep XJ Cherokee YJ Wrangler NP207 & 231C Transfer Case Chain

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

$119.00
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

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