Ax-15 Swap?

[brendan88mj]

As many of you know the peugot tranny(AX-5) that came in the renix style MJs is pretty embarassing. I was wondering if anyone knows how big of a deal swapping an AX-15 would be. I have one laying around with low miles mated to a np231. My jeep is an 88 MJ with the 4.0.

[onlyinajeep726]

The pukegoat is a the BA-10/5, not the AX5.  AX5s were found behind the 2.1/2.5/2.8 engines.  But anyway, it's a fairly straight forward swap and many, many write ups on it.  Best bet is to find you a '94+ AX15 (since those are external slaved and have a larger input shaft) because it's the same amount of work and you'll be glad you did later...  Hope this helps.

 

http://www.lmgtfy.com/?q=ba10+to+ax15+swap

[brendan88mj]

Are any modifications required or should it mount straight up?

[yxmj]

What year is the 15?

 

I think if I remember correct....and someone will jump in if i am wrong....the only thing that could be different it the mating of the input shaft pilot bushing....I believe it changed at one point (could be wrong).

 

And now that I think of it check your output shaft spline count to see if it is the same.

 

All the bolts for mounting will definitely line up

[onlyinajeep726]

Input shaft changed from 0.5" to just shy of 0.75" in '94 IIRC.  All AX15's use 23 spline outputs shafts to mate to the transfer case and BA-10's use a 21 spline.  You will have to find a transfer case to match or swap input gears.  Easier to just swap cases IMO.

 

As far as pilot bushings, if you use a later model AX15 on a Renix era 4.0, you'll need a '74 CJ with 304 V8 pilot busing (Dorman P/N: 690-042).

 

Make sure when you get your AX15 to also grab the crossmember (only one for an AX15 will work) and the transfer case linkages.  The flywheel on your Renix is the same between the 10 and the 15.  Other than that, happy swap to you and good luck on your search for a 15.

 

http://www.novak-adapt.com/knowledge/np_nvg_input_gears.htm

 

http://www.novak-adapt.com/knowledge/ax15.htm

[FrankTheDog]

Input shafts changed in to the larger size in 1992.

[onlyinajeep726]

Input shafts changed in to the larger size in 1992.

 

You're right... I misread the Novak page.  I really need to learn to read haha.

 

To the OP, I'd still recommend a '94+ AX15 as those will be external slaved and larger input shaft.

[sloride]

Its pretty straight forward as previous posters have said. I put a AX15 from a '96 XJ in my '88. Used '74 CJ with 304 V8 pilot busing (Dorman P/N: 690-042) that the others mention. The AX15 cross member I didn't have so I modified my existing cross member to work. Just cut the center portion the tranny sits on and lowered it an inch and rewelded it back together. The holes in the cross memeber I had to slot to make work since it moved from the original position. When you get to that point you'll realize what you need to do to make work. You'll need to figure out how to isolate the exhaust pipe since the tanny mount you'll need won't support the exhaust pipe like the one you had before..

[xjrev10]

Is it possible to use a newer bell housing on a older AX15 to get rid of the internal slave? I have a older one I would like to use. If its possible, I suppose it will be impossible to find.

[yxmj]

Not only possible but highly advisable....there out there....a lot of XJ's came with them

[onlyinajeep726]

If you put an external slave bellhousing on an AX15 that came with an internal slave, you need to get the throwout bearing retainer too.  This thing:

External on left, internal on right.