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 YJ Wrangler Factory NP 231 Transfer Case Shifter Knob

Jeep YJ Wrangler Factory NP 231 Transfer Case Shifter Knob

$12.00
Jeep YJ Wrangler  Factory  NP 231 Transfer Case

Jeep YJ Wrangler Factory NP 231 Transfer Case

$165.00
Crown Automotive J8134473 1997-2006 Tj Wrangler W/np231 Transfer Case; ;1997-20

Crown Automotive J8134473 1997-2006 Tj Wrangler W/np231 Transfer Case; ;1997-20

$22.79
231J Transfer Case Jeep Cherokee, Comanche, Grand Cherokee, Liberty, Wrangler

231J Transfer Case Jeep Cherokee, Comanche, Grand Cherokee, Liberty, Wrangler

$695.00
Transfer Case Shifter Lever Knob JEEP Wrangler YJ 1987-1995 OEM

Transfer Case Shifter Lever Knob JEEP Wrangler YJ 1987-1995 OEM

$20.00
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
Jeep Wrangler TJ Transfercase NP231 5sp 4.0L Manual Automatic 97-02 transfer 97u

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

$369.95
Crown Automotive 83502829 Transfer Case Yoke Fits 87-95 Wrangler (YJ)

Crown Automotive 83502829 Transfer Case Yoke Fits 87-95 Wrangler (YJ)

$49.11
OEM Jeep Wrangler YJ Transfer case 4x4 Shifter Shift Assembly automatic 0335

OEM Jeep Wrangler YJ Transfer case 4x4 Shifter Shift Assembly automatic 0335

$62.70
JEEP WRANGLER TJ  97-03  NP 231 J TRANSFER CASE 23 Spline Long Input FREE SHIP

JEEP WRANGLER TJ 97-03 NP 231 J TRANSFER CASE 23 Spline Long Input FREE SHIP

$345.00
87-90 Jeep Wrangler YJ 5-Speed GEAR SHIFT STICK & Transfer Case SHIFTER Set 4.2

87-90 Jeep Wrangler YJ 5-Speed GEAR SHIFT STICK & Transfer Case SHIFTER Set 4.2

$99.99
Transfer Case, Reman, with SYE Kit NP231J 231 Jeep Wrangler lift TJ LJ XJ

Transfer Case, Reman, with SYE Kit NP231J 231 Jeep Wrangler lift TJ LJ XJ

$950.00
Jeep Wrangler YJ NP231J Transfer Case Snap Ring Planetary Carrier OEM

Jeep Wrangler YJ NP231J Transfer Case Snap Ring Planetary Carrier OEM

$11.99
Jeep Wrangler YJ NP231J Transfer Case Bearing Retaining Ring OEM

Jeep Wrangler YJ NP231J Transfer Case Bearing Retaining Ring OEM

$11.99
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

$46.99
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
Crown Automotive 83502829 Transfer Case Yoke Fits 87-95 Wrangler (YJ)

Crown Automotive 83502829 Transfer Case Yoke Fits 87-95 Wrangler (YJ)

$54.60
Crown Automotive 83502829 Transfer Case Yoke Fits 87-95 Wrangler (YJ)

Crown Automotive 83502829 Transfer Case Yoke Fits 87-95 Wrangler (YJ)

$52.52
Crown Automotive 83502829 Transfer Case Yoke Fits 87-95 Wrangler (YJ)

Crown Automotive 83502829 Transfer Case Yoke Fits 87-95 Wrangler (YJ)

$47.71

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