We have a large inventory of rebuilt NP231 transfer cases plus Transfer Case parts. Our Transfer Cases are factory rebuilt and re-manufactured. We offer free knowledgeable technical support!

Below you will find a detailed list that includes complete NP231 rebuilt Transfer Cases, bearing rebuild kits,(it is recommended that when ordering bearing overhaul kits you also order a small parts kit) gaskets, seals, small parts & thrust washers, bushings individual bearing, forks, hubs and sliders, oil pump, planets, chain, sprockets, shafts input & main, cases housings and miscellaneous parts. If you need more information or cannot find the parts you need give us a call, if you would like to save money, ask about our good take out parts (GTO), they are inspected and guaranteed.

If you would like to save money ask about our good take out parts (GTO), they are inspected and guaranteed. Use our online shopping cart, just click the part number and see additional information, add to cart or proceed to check out. If you need more information or cannot find the parts you need give us a call 888-824-2012.

Our Rebuilt NP231 Transfer Cases are tested before leaving the factory. This transfer case was manufactured by New Venture Gear. This model is chain driven. The NP231 is 4WD with manual shift. The NP231 was used in Chevrolet and GMC small pickups and Jeep. This unit was utilized beginning in 1992.

What is the NP231 Transfer Case

The NP231 was manufactured with left side drop output and has a low gear ratio of 2.72 to 1. This unit has 2WD and 4wd, combination of 2 high, 4 high, neutral and 4 low. The unit has a 27 spline front output and utilizes a rear slip yoke. The NP231 was offered in Chevrolet, Dodge, GMC and Jeep. Some pickups in a heavy duty version with wider chains, sprockets and HD planetary.

NP231 Transfer Case Issues

This unit can have issues with premature chain failure, caused by running the NP231 transfer case on hard surfaces like concrete or asphalt, Run 4WD only on loose dirt, snow, mud, sand or grass as the different wheel speeds in turns can put excessive torque loads on chain and sprockets.

If you have purchased your vehicle used the very first order of business is to double check the tire diameters. Used car dealers may have mismatched the tires to make the sale. Mismatched tires will cause the NP231 transfer case to fail. Recommended fluid for the NP 231 transfer case is automatic transmission fluid (ATF).

We can provide a rebuilt NP231 transfer cases with a 12 month warranty we also offer all parts required to rebuild your unit, we have new parts we can also provide good used takeout parts to save you money!

Free NP231 Transfer Case parts illustration

Below we provide a NP231 parts illustrations to assist you with the correct identification of the parts you need. Upgrade parts are available for the NP231. Select the parts you require from the the list below and give us a call. To speak to a Drive Train Expert or to place and order call toll free 888-824-2012, buy factory direct and save money!

This information tag is located on rear of transfer case near where the driveshaft exits. Please supply the assembly number when ordering a replacement.

Need Stronger Parts?

Midwest Transmission can Cryogenic Treat any shaft or gear. This cryo treatment will add 30% in component strength. Call 888-824-2012 for a quote.

REBUILt UNITS

BEARING KITS

small parts

GASKEts and seals

bearings

forks

Synchros

SHAFTS

Cases and Housing

Miscellaneous Parts

Minimum order $25.00, Shipping and handling charges will be added.