The AX15 transmission has always been a great transmission able to handle the torque and horsepower of most V8s. The biggest problem now is the availability of new units. With the lack of availability of new NV3550s, we revisited the possibility of obtaining the Aisin Warner AX15 transmission and were successful. Although the torque specifications are not listed on this transmission in any service manual, we feel it's similar enough to the NV3550. The NV3550 was the transmission that superseded the AX15; and Jeep used the same engine with the same vehicle ratings. With the availability of AX15 transmissions, we can now offer some additional transmission retrofit applications.
NOTE: These AX15 transmissions feature a 13 degree tailhousing rotation and are exact replacement transmissions for 1997-2000 Jeep TJ Wranglers. If installing this AX15 into Jeep Cherokee, the tailhousing rotation will be wrong. Cherokees transmission have a 23 degree rotation tailhousing. The rotation difference will lead to install issues with the Cherokee NP231 transfer case shifter.
We offer oil for this transmission under P/N 29-2341
AX15 Direct Replacement:
AX15 transmissions were used between 1988 to 1999 in the Jeep vehicles. Since these Jeeps are getting up in mileage, a new AX15 makes sense as a direct retrofit. Available in both an internal and external release bearing design.
AX15 retrofitting the AX5:
This is a newer kit for all 4 cylinder Jeeps 1987 to 2002. The AX5 is considered a light duty transmission compared to the AX15. Jeeps equipped with larger tires and lower gears in the axle & transfer case may find the weak link in the drivetrain is the stock transmission. You can now install the AX15 in place of the AX5 to gain some drivetrain strength. The nice thing is that when you're ready to replace the 4 cylinder with a larger V6 or V8, the AX15 is an ideal transmission for the power increase. See kits 712563, & 712564, this transmission swap will also require a new transfer case input gear with 23 splines.
Peugeot 5 speed Replacement:
The AX15 is the exact same length. The kits we offer include a new input gear for either the New Process 231 or 207 transfer case. Due to vehicle variances, some applications may require transfer case linkage modifications. Kits include a new bellhousing, transfer case shifter linkage, a crossmember adapter mount to retain the stock Peugeot rubber mount, slave cylinder kit, and an input gear for your transfer case. See kit 27-3507AA and kit 27-3510AA
Bronco Dana 20 Applications for the AX15:
These transmissions are ideal transmission swaps for the early Broncos. The weight of these 5 speeds is similar to the stock 3 & 4 speed transmissions. The overall size and length make it an ideal fit. The gearing of these 5 speeds is as follows:
AX15 is 1st 3.83:1; 2nd 2.33:1; 3rd 1.44:1; 4th 1.00:1; 5th 0.79:1, and Reverse 4.76:1.
*Please allow 2+ Weeks for all Transmission Shipments
