NP-231, NP231 Gasket & Seal Kit; and Bearing Gasket and Seal Kit

The New Process Gear 231 Transfer Case is used in the following vehicles:

GM Blazer, Jimmy SUV 1995-Up;
S-10, S-15, Sonoma Pickup 1995-Up;
Dodge Ram Pickup 1994-2001;
Dakota 1998-1999;
Durango 1999)

The Gasket and Seal Kit have three different configurations:

All Except Jeep,
Jeep Except Liberty and
Jeep Liberty Only.

Here are the difference for the Bearing Gasket and Seal Kit:

GM, Dodge and Jeep with 24mm wide Input Bearing (Pictured Below),
GM and Dodge with 16mm wide Input Bearing,
Jeep (except Liberty)
Jeep Liberty.

It is important to know the correct one for your application. Most of the time the year and engines size of the vehicle could be helpful in determining the correct kit.

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