Starting the 5.3 swap for my 99 Tj and considering keeping the stock 5 speed

[Kmorrow77]

I’m about to begin the 5.3 swap on my 99 tj. It has the AX15 5 speed in it and I would love to keep it In the Jeep but not sure it’ll hold up. Does anyone have any experience with these transmissions being mated to a v8?

 

[Jerry Bransford]

The AX-15 is commonly installed behind small V8 engines in Japan (likely elsewhere too) where it holds up well.

 

[motomick76]

I just got done with 4.8 behind a NV3550, which are very similar. There are alot of pictures and info here. If you have any questions, shoot me a PM.

Also, welcome to the forum!

 

[Wildman]

The NV-3550 are rated for 300 ft lbs of TQ and the AX-15 is guessed to be similar in strength but there aren't any numbers listed for the AX-15. Novak says in their opinion the Ax-15 is one of the best transmissions put into a Jeep.

 

[Moto Mike]

I just did this swap, but bought an engine to include the 6l80E tranny. Just seemed to be the right choice since it was matched to the engine.