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Condition: VIN: 1J4FA39S02P739208
Year: 2002 Number of Cylinders: 6
Make: Jeep Transmission: Manual
Model: Wrangler Body Type: Sport Utility
Trim: X Sport Utility 2-Door Warranty: Vehicle does NOT have an existing warranty
Engine: 4.0L 242Cu. In. l6 GAS OHV Naturally Aspirated Vehicle Title: Clear
Drive Type: 4WD Options: 4-Wheel Drive
Mileage: 114,000 Safety Features: Driver Airbag, Passenger Airbag
Exterior Color: Red Fuel Type: GAS
Interior Color: Black For Sale By: Private Seller

NPG-231J_cr.jpg
ModelNew Process Gear 231 J
Assembly number5211 1252AD
Serial number01 1 02 02
ratio2.72
This unit is chain driven front output, left hand drop (front drive shaft on driver's side) on the Jeep.  The 231 are a lightTransfer Case NP231 Drawing & Parts Listduty transfer case typically used in 4 and 6 cylinder Jeep applications.  These New Process cases have a circular tag on the rear of the case, near the center close to where the rear drive shaft exits. Identification information for the NP231 transfer case is on this tag typically includes model number, assembly number, and serial number and ratio data. When ordering a replacement transfer case it's most important to provide the assembly number. This number is typically eight digits, four number a rivet/screw head and four additional numbers.

Jeep, versions all use a 6-bolt circular bolt pattern. This pattern is non-symmetrical and will only bolt up one way. Jeep units and Dodge units are general interchangeable, however Chevrolet units are not. While GM uses the same 6-bolt patter, they have it rotate approximately 90 degrees from that used by Jeep or Dodge. 

NP231 transfer cases come with either a 21 or 23 spline female input. The 21 spline shaft is frequently found in 4 cylinder applications and the 2.8L V6, While 4.0L 6 cylinder and 8 cylinder applications always used the 23 spline input shaft.   
 
Zerex G-05 1 gal = 151.7 oz 1 gal water = 132.8 oz 1 gal 50/50 = 142.25 oz
count:13 8 0 5 5