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.

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

$40.00
JEEP WRANGLER TRANSFER CASE MODEL NP 231 4 CYL AUTO TRANSMISSION 1997 1998

JEEP WRANGLER TRANSFER CASE MODEL NP 231 4 CYL AUTO TRANSMISSION 1997 1998

$554.99
1997-99 Jeep Wrangler NP231 231 Transfer Case Assembly 34,000 Miles 52099211

1997-99 Jeep Wrangler NP231 231 Transfer Case Assembly 34,000 Miles 52099211

$799.99
Jeep Wrangler TJ NP231 Transfercase Drive Shift Collar  97-06 Transfer Case

Jeep Wrangler TJ NP231 Transfercase Drive Shift Collar 97-06 Transfer Case

$34.95
Jeep Wrangler TJ NP231 Transfercase Shift Range Collar Gear 97-06 Transfer Case

Jeep Wrangler TJ NP231 Transfercase Shift Range Collar Gear 97-06 Transfer Case

$34.95
Jeep Slip Yoke NP 231 Transfer Case High Angle fits 87-95 (YJ) Wrangler

Jeep Slip Yoke NP 231 Transfer Case High Angle fits 87-95 (YJ) Wrangler

$49.00
Jeep Wrangler TJ XJ LJ NP231J Transfer Case OEM

Jeep Wrangler TJ XJ LJ NP231J Transfer Case OEM

$1,650.00
Jeep Wrangler Yj 87-95 Billet Transfer Case Shift Knob  X 11420.24

Jeep Wrangler Yj 87-95 Billet Transfer Case Shift Knob X 11420.24

$27.99
 JEEP 83502855 TRANSFER CASE Slip Yoke Fits 87-95 Wrangler (YJ) CROWN  SPICER

JEEP 83502855 TRANSFER CASE Slip Yoke Fits 87-95 Wrangler (YJ) CROWN SPICER

$52.50
Jeep Wrangler YJ Transfer Case Shifter, 4.2L Auto. 87-90 OEM  NICE

Jeep Wrangler YJ Transfer Case Shifter, 4.2L Auto. 87-90 OEM NICE

$125.00
Jeep Wrangler TJ XJ LJ NP231J Transfer Case Reman SYE Kit w/ Custom Driveshaft

Jeep Wrangler TJ XJ LJ NP231J Transfer Case Reman SYE Kit w/ Custom Driveshaft

$1,320.00
231 AMC 272 TRANSFER CASE 23 SPLINE Automatic 4.2L 6 Cyl 87-90 Jeep Wrangler YJ

231 AMC 272 TRANSFER CASE 23 SPLINE Automatic 4.2L 6 Cyl 87-90 Jeep Wrangler YJ

$399.99
Jeep Wrangler TJ Transfercase NP231 5sp 4.0L Manual Automatic 97-02 transfer 02v

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

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

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

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

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

$299.95
Daystar KJ01008BK Transfer Case Drop Lower Kit 87-02 TJ Wrangler YJ Black 1.25

Daystar KJ01008BK Transfer Case Drop Lower Kit 87-02 TJ Wrangler YJ Black 1.25"

$40.75
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)

$41.99
Rubicon Express RE2100 Transfer Case Lowering Kit Fits 87-02 Wrangler YJ/TJ/LJ

Rubicon Express RE2100 Transfer Case Lowering Kit Fits 87-02 Wrangler YJ/TJ/LJ

$44.99
Crown Automotive 83502855 Transfer Case Slip Yoke Fits 87-95 Wrangler (YJ)

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

$63.34
FITS 94-95 WRANGLER 94-96 CHEROKEE 4.0L W/NP231 TRANSFER CASE HOUSING EXTENSION

FITS 94-95 WRANGLER 94-96 CHEROKEE 4.0L W/NP231 TRANSFER CASE HOUSING EXTENSION

$51.69

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