tranny output seal

[JeepcoMJ]

I'm planning on putting an np242 on my comanche, which has an ax5 transmission. output is 21 spline, and the 242 DOES have a 21 spline input.

 

BUT it's a short input shaft, and the ax5 uses the long input shaft.

 

does anyone know a part number for a custom seal that will cover the 1/2" difference. i know there's a spacer out there but I can make one myself for cheaper...I'd rather use longer seal, and don't have the $$$ for the longer input shaft

 

 

-Pat

[mjeff87]

never heard of a custom seal (but that doesn't mean it doesn't exist...)

 

you sure your AX5 has the recessed output? I played h*ll with mine when I converted it because I bought a used AX5 that had it without knowing, and tried to mate a short input 231 to it (leaked like a seive). Found out the tranny came from a YJ, not an XJ/MJ. Swapped it out with an XJ tranny, still the one that's in there, and all's been good since. I've got another AX5 in the parts pile I pulled from an MJ, and it's a shallow output as well.

 

FWIW, I searched high and low, and could NOT find a 231 21 spline with a long output.

 

Jeff

[JeepcoMJ]

hmm. correy's had a long input shaft on it. maybe i'll check into the output since i have 2 parted out trannies laying here...

[Kenosha Warrior]

a 21 spline NP242 is a RARE animal as 87 was te only year for them.

 

Most were 23 spline.

[JeepcoMJ]

a 21 spline NP242 is a RARE animal as 87 was te only year for them.

 

Most were 23 spline.

 

87-early 90 is 21 spline input.

 

I will know for sure i can use it once i tear it out of the cherokee.

[mjeff87]

I also have a 21 spline 242 in the same parts pile....it's a short input as well

[JeepcoMJ]

I also have a 21 spline 242 in the same parts pile....it's a short input as well

 

if mine is 23 spline, can we work a trade? I'm pretty hell-bent on putting a np242 into the comanche.

[mjeff87]

well, see what ya got first. I'm running a 2.5 also, but am ruminating about either a 4.0 or a 340 swap in the not-to-distant future. Ye olde 4 popper just isn't cutting it with the 33Xx12.5's.....

[HOrnbrod]

well, see what ya got first. I'm running a 2.5 also, but am ruminating about either a 4.0 or a 340 swap in the not-to-distant future. Ye olde 4 popper just isn't cutting it with the 33Xx12.5's.....

 

'Bout time ya realized that Jeff-man. Stroker time? :cheers:

[mfpdm]

The 242 I just got a few weeks back is 21 spline. Came out of an 87 XJ. It also has the short input. I'm putting it behind a AW4 though and that is what it came behind in the 87. However, now you have me thinking I'm going to have the same issue with the short shaft. I had to deal with this once already with the TJ when I swapped in a 241OR(short shaft) for the 231(long shaft). What a pain that was. Used a Teraflex seal extender to fix that but it won't work on the AW4 tranny.

[JeepcoMJ]

aw4 uses a short input with 21 spline, you'll be OK. I'm pulling mine off of a 90 aw4.

[TNT]

I know a couple of people who have shortened the trans output shaft without a problem.

[JeepcoMJ]

the problem is the flange is that much further...shortening the output shaft won't work.

[mjeff87]

well, see what ya got first. I'm running a 2.5 also, but am ruminating about either a 4.0 or a 340 swap in the not-to-distant future. Ye olde 4 popper just isn't cutting it with the 33Xx12.5's.....

 

'Bout time ya realized that Jeff-man. Stroker time? :cheers:

 

Standby for a PM in the next couple days or so Don.....I need to pick your brain

 

:cheers:

 

Jeff