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 Transfer case 4wd shifter stock Wrangler YJ

Jeep Transfer case 4wd shifter stock Wrangler YJ

$40.00
★ Jeep YJ 91-95 Wrangler - 231 J TRANSFER CASE || 272 * 23 Spline Count LONG

★ Jeep YJ 91-95 Wrangler - 231 J TRANSFER CASE || 272 * 23 Spline Count LONG

$409.95
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

$45.00
Jeep Wrangler NP 231J 23 Spline Input Transfer Case

Jeep Wrangler NP 231J 23 Spline Input Transfer Case

$700.00
★ Jeep YJ 91-95 Wrangler - 231 J TRANSFER CASE || 272 * 21 Spline Count

★ Jeep YJ 91-95 Wrangler - 231 J TRANSFER CASE || 272 * 21 Spline Count

$400.00
18886.90 NP231 Transfer Case Gasket Jeep Wrangler Cherokee 84-02 With AX4 AX5

18886.90 NP231 Transfer Case Gasket Jeep Wrangler Cherokee 84-02 With AX4 AX5

$2.48
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
Jeep Wrangler YJ transfer case shifter, AX5  5spd.  OEM

Jeep Wrangler YJ transfer case shifter, AX5 5spd. OEM

$89.99
Crown Automotive 83502855 Transfer Case Slip Yoke 87-95 Wrangler (YJ)

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

$62.84
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)

$31.53
OEM Jeep Wrangler YJ Transfer Case Shifter Shift Knob 87-95

OEM Jeep Wrangler YJ Transfer Case Shifter Shift Knob 87-95

$9.95
89 90 JEEP WRANGLER Transfer Case model NP 231 6 cyl MT 0110161

89 90 JEEP WRANGLER Transfer Case model NP 231 6 cyl MT 0110161

$400.00
Trailmaster JYTCS Transfer Case Drop Bracket TJ Wrangler (TJ) Wrangler (YJ)

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

$58.30
Omix-Ada 18676.29 Transfer Case Output Seal 87-95 Wrangler (YJ)

Omix-Ada 18676.29 Transfer Case Output Seal 87-95 Wrangler (YJ)

$5.67
Jeep Wrangler YJ 87-95 Transfer Case Shifter Knob #009

Jeep Wrangler YJ 87-95 Transfer Case Shifter Knob #009

$14.99
Crown Automotive 83501389 Transfer Case Output Seal Cherokee (XJ) Wrangler (YJ)

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

$3.36
NEW Crown Automotive Transfer Case Slip Yoke 87-95 Wrangler YJ Jeep Free Ship af

NEW Crown Automotive Transfer Case Slip Yoke 87-95 Wrangler YJ Jeep Free Ship af

$66.70
Jeep Cherokee Wrangler 1987-1996 NP231 Transfer Case Replacement Chain

Jeep Cherokee Wrangler 1987-1996 NP231 Transfer Case Replacement Chain

$119.99
Jeep Wrangler TJ NP231J 23 Spline Transfer Case LONG input  Automatic ALL

Jeep Wrangler TJ NP231J 23 Spline Transfer Case LONG input Automatic ALL

$255.00
Jeep XJ Cherokee YJ Wrangler NP207 & 231C Transfer Case Chain

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

$121.99

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