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.

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)

$40.85
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)

$37.09
JEEP YJ XJ WRANGLER NP231 TRANSFER CASE EXTENSION TAIL HOUSING RETAINER

JEEP YJ XJ WRANGLER NP231 TRANSFER CASE EXTENSION TAIL HOUSING RETAINER

$45.82
DTPLV NP 231 Transfer Case Chain Jeep NEW NP231 Liberty Wrangler

DTPLV NP 231 Transfer Case Chain Jeep NEW NP231 Liberty Wrangler

$60.10
Transfer Case Mounting Stud Kit (6) NP 231 241 247 208 Jeep Wrangler  TJ XJ YJ

Transfer Case Mounting Stud Kit (6) NP 231 241 247 208 Jeep Wrangler TJ XJ YJ

$21.82
Front Output Yoke 26 Spline NP231 Transfer Case 1310 CV Jeep Wrangler 4798120

Front Output Yoke 26 Spline NP231 Transfer Case 1310 CV Jeep Wrangler 4798120

$49.82
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)

$48.87
Jeep Wrangler YJ TJ Skid Plate Bolt Kit Belly Pan Bolts Transfer Case Drop

Jeep Wrangler YJ TJ Skid Plate Bolt Kit Belly Pan Bolts Transfer Case Drop

$33.99
OEM MOPAR TRANSFER CASE VACUUM HARNESS 87-90 JEEP WRANGLER YJ KANDA #53002033

OEM MOPAR TRANSFER CASE VACUUM HARNESS 87-90 JEEP WRANGLER YJ KANDA #53002033

$62.32
Omix-Ada 18676.25 NP231 Transfer Case Housing Extension for 87-95 Wrangler YJ

Omix-Ada 18676.25 NP231 Transfer Case Housing Extension for 87-95 Wrangler YJ

$52.86
Omix-Ada 18676.14 NP231 Transfer Case Vacuum Switch for 87-93 Jeep Wrangler YJ

Omix-Ada 18676.14 NP231 Transfer Case Vacuum Switch for 87-93 Jeep Wrangler YJ

$70.69
Alloy USA 11650 -Transfer Case Chain for 84-06 Cherokee/Wrangler XJ/WJ/YJ/TJ

Alloy USA 11650 -Transfer Case Chain for 84-06 Cherokee/Wrangler XJ/WJ/YJ/TJ

$80.49
1987-95 JEEP YJ WRANGLER NP231 TRANSFER CASE SHIFTER BRACKET BRACE MOUNT OEM

1987-95 JEEP YJ WRANGLER NP231 TRANSFER CASE SHIFTER BRACKET BRACE MOUNT OEM

$40.00
87-95 Jeep wrangler 231 front drive shaft output Yolk YJ transfer case

87-95 Jeep wrangler 231 front drive shaft output Yolk YJ transfer case

$20.00
97-02 Jeep Wrangler LJ TJ NP231 Transfer Case 5sp Manual 4cyl   OEM

97-02 Jeep Wrangler LJ TJ NP231 Transfer Case 5sp Manual 4cyl OEM

$425.00
NP231J Transfer Case Rear Tailshaft Retainer for Wrangler YJ and Cherokee

NP231J Transfer Case Rear Tailshaft Retainer for Wrangler YJ and Cherokee

$32.00
Jeep Wrangler YJ   NP 231 J  Transfer Case 272 ratio 21 spline Short input

Jeep Wrangler YJ NP 231 J Transfer Case 272 ratio 21 spline Short input

$325.00
Jeep Wrangler YJ 90-95 NP 231 J Transfer Case 23 Spline Short Input 6 CYL Stan

Jeep Wrangler YJ 90-95 NP 231 J Transfer Case 23 Spline Short Input 6 CYL Stan

$365.00
Crown Automotive 83503572 Transfer Case Fits 87-89 Wrangler (YJ)

Crown Automotive 83503572 Transfer Case Fits 87-89 Wrangler (YJ)

$218.40
Jeep Wrangler YJ   87-95  Transfer Case Automatic 23 Long 4 / 6 CYL FREE SHIP

Jeep Wrangler YJ 87-95 Transfer Case Automatic 23 Long 4 / 6 CYL FREE SHIP

$360.00

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