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.

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

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

$45.26
Crown Automotive 83502855 Transfer Case Slip Yoke 87-95 Wrangler (YJ)

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

$56.38
Omix-Ada 18676.26 Transfer Case Mode Shift Fork 87-93 Wrangler (YJ)

Omix-Ada 18676.26 Transfer Case Mode Shift Fork 87-93 Wrangler (YJ)

$63.28
Daystar KJ01008BK Transfer Case Drop Kit 87-02 Wrangler (TJ) Wrangler (YJ)

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

$35.05
Rubicon Express RE2100 Transfer Case Lowering Kit Wrangler (TJ) Wrangler (YJ)

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

$55.06
Teraflex 2104400 Low 231 HD Transfer Case 88-02 TJ Wrangler (TJ) Wrangler (YJ)

Teraflex 2104400 Low 231 HD Transfer Case 88-02 TJ Wrangler (TJ) Wrangler (YJ)

$1,747.16
Omix-Ada 18676.18 Transfer Case Range Shift Fork Bushing 87-93 Wrangler (YJ)

Omix-Ada 18676.18 Transfer Case Range Shift Fork Bushing 87-93 Wrangler (YJ)

$17.99
Crown Automotive 83501389 Transfer Case Output Seal Cherokee (XJ) Wrangler (YJ)

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

$17.99
93-06 JEEP WRANGLER TJ YJ TRANSFER CASE SPEED SENSOR GEAR 40 TEETH ORANGE NP231

93-06 JEEP WRANGLER TJ YJ TRANSFER CASE SPEED SENSOR GEAR 40 TEETH ORANGE NP231

$31.50
Rugged Ridge 18676.74 - Wrangler Transfer Case Bearing for Transfer Case NP 231

Rugged Ridge 18676.74 - Wrangler Transfer Case Bearing for Transfer Case NP 231

$17.56
Jeep Wrangler TJ NP231 21 spline Transfer Case '97' to '02'

Jeep Wrangler TJ NP231 21 spline Transfer Case '97' to '02'

$250.00
Omix-Ada 18676.26 Transfer Case Shift Fork 87-93 Wrangler (YJ)

Omix-Ada 18676.26 Transfer Case Shift Fork 87-93 Wrangler (YJ)

$61.99
Omix-Ada 18676.26 Transfer Case Shift Fork 87-93 Wrangler (YJ)

Omix-Ada 18676.26 Transfer Case Shift Fork 87-93 Wrangler (YJ)

$59.99
Omix-Ada 18676.26 Transfer Case Mode Shift Fork 87-93 Wrangler YJ

Omix-Ada 18676.26 Transfer Case Mode Shift Fork 87-93 Wrangler YJ

$58.27
Crown Automotive 83501389 Transfer Case Output Seal Cherokee (XJ) Wrangler (YJ)

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

$17.31
Daystar KJ01008BK Transfer Case Drop Kit 87-02 Wrangler  TJ  Wrangler  YJ

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

$40.94
87-90 4x4 shifter Jeep Wrangler 231 transfer case YJ 5 speed trans stick BA10

87-90 4x4 shifter Jeep Wrangler 231 transfer case YJ 5 speed trans stick BA10

$75.00
Omix-Ada 18676.23 Transfer Case Shift Fork Pad Set NP231 87-90 Jeep Wrangler

Omix-Ada 18676.23 Transfer Case Shift Fork Pad Set NP231 87-90 Jeep Wrangler

$4.76
18676.57 Omix-ADA Mainshaft JEEP Wrangler 94-99 Cherokee 1997-99 NP231 Transfer

18676.57 Omix-ADA Mainshaft JEEP Wrangler 94-99 Cherokee 1997-99 NP231 Transfer

$299.48

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