There are several bellhousings available for the AX15 transmissions that mate to a variety of engines. The Aisin-Warner AX15 and Jeep NVG 3550 Transmission share a common pattern so the same applies to both transmissions.
The following are for the external slave 4.0L AMC/Jeep engine originally used 1993-2004. The last part number extends that to the 2006 with the addition of another CPS location, allowing replacement of the often problematic factory 6 speed.
The following are for the Dodge 3.9L & 5.2L V8 to AX15 & NV3550
The following are for the Jeep AMC 2.5L inline 4 cylinder
These are brand new units from Aisin and are stronger than any of the original Jeep or Dodge pieces. Originally rated as a Light Duty unit, these carry a Medium Duty rating. They have been successfully used behind LS1, LS2 and the like. With proper care they are extremely strong. Included is our exclusive straight stick that may be bent to the perfect ergonomic location for your application.
The following transmissions will work with these bellhousings:
Be aware there are different rotations on the transfer case between Wrangler and XJ applications. The new AX15 we sell is the Wrangler rotation but can be machined for XJ positioning on request (no charge). Two wheel drive versions work the same as 4x4 versions on engine side of the installation procedure described here but if you want to attach a transfer case, the entire rear half, output shaft and several other pieces must be changed to allow the transfer case to bolt up. This usually makes this impractical.
The bellhousings are compatible with their respective engines. We have several adapters listed below in the links that take these to a standard Ford or GM pattern for additional applications.
Because of its assembled length, CJ7 or longer wheelbases are compatible. Anything shorter simply leaves insufficient rear driveshaft length. Full sized Jeeps, Wagoneers and Cherokees are good candidates, especially for the stronger Novak transmission version. Just keep in mind the rating of the transmission and you’ll be fine with those applications.
The AX15 and NV3550 feature a threaded base for support and isolation of the transmission and transfer case. Factory style isolator mounts are difficult to work with in any situation other than as a direct factory replacement. Novak has engineered a universal style rear mount that is easy to affix to a variety of Jeep crossmembers and is very strong and highly adjustable. We recommend it in any retrofit situation. More info on this mount can be seen here.
While sometimes not needed in this application, it is priceless when clearances dictate its use. With all the variabilities in flywheel and clutch height, we adamantly recommend its use. Further information is here.
If your Jeep has the master cylinder, that part can be reused. If not we would recommend this master for most Jeep applications.
The Novak adjustable slave cylinder offers several advantages over stock plastic slave pieces:
With the parts specified above, this is generally a bolt together procedure using normal mechanics tools.