This conversion kit joins the popular AX15 overdrive transmission to the standard GM pattern bellhousings for a variety of OEM transmissions. These are strong transmissions, and full Size Jeeps such as Wagoneers, J-Trucks, etc. are conversion candidates for them unless used for more aggressive driving or heavy work situations. This affordable and straightforward method allows the installer to retain the bellhousing they already own, and in many cases, the existing clutch and its release system.

The adapter is precision designed and expertly CNC machined from alloy aluminum. Its thick cross-section provides ample thread engagement and high structural integrity. Precision indexing is achieved through locating dowels to the transmission and bearing retainer to the bellhousing. This adapter is 1" thick for a total adapted length of 17.7".

The adapter installs onto these transmissions with no change of input gear or other transmission internals. Cutting the transmission input shaft is not required as the adapter spaces the transmission properly for the GM crank and clutch assembly. A new pilot bushing is required for this assembly. See Related Products below for the one matching your particular GM engine.

Kit Includes: 

• adapter plate
• bearing retainer (which serves as a centering index for the GM bellhousing and clutch release bearing sleeve)
• required hardware

Pilot Bushings is required for all installations. Please choose your applicable engine and transmission combination in the pull-down menu to the right.

Fits:

• FSJs with 225 or 231 V6
• FSJs with SBC / LS Conversion

Nearly all GM Generation I-III engines are compatible with this conversion, including Chevrolet Small Blocks, Gen III+ V8's, Chevrolet V6's and Chevrolet I6 engines. Buick, Olds, Pontiac, and other GM engines are compatible with this adapter assembly if you have a standard shift classic GM bellhousing and flywheel for your engine. Even some of the front wheel drive and odd application engines could be made to work with this adapter using certain factory or aftermarket bellhousings sharing this common rear pattern.

Factory pressure plates—both three-finger and diaphragm styles—are compatible with this setup. However, it’s important to ensure your clutch matches both your flywheel and bellhousing, as not all bellhousings and flywheels can accept larger clutch sizes. For example, 153-tooth flywheels require the less common 10-1/2” clutch. Converting to this size means you’ll need the correct bellhousing, flywheel, clutch, and starter. We recommend planning your setup in advance to avoid chasing hard-to-find components later.

In most cases, you can reuse the factory clutch release arm and linkage, whether your Full Size Jeep uses a mechanical bellcrank system or a hydraulic clutch—factory or aftermarket.