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Unread 05-15-2014, 03:54 PM   #1
Dedgar
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1988 MJ Comanche 
 
Join Date: May 2014
Location: Glencoe, Al
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Help with getting my tranny back in

I recently got a mj with a blown motor, it also came with a 93 xj 4.0. As the mj came stock with a renix motor I kept my intake and exhaust and swaped the rest. Now that I am trying to get my ax15 put back in place I can't get it to slide all the way on. Am I not lining it up well enough or is there some small difference that is keeping me from finishing up? Any help would be great.

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Unread 05-15-2014, 06:39 PM   #2
Caish
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Sounds like you have the clutch disc slightly mis-aligned, or you need to put the tranny into gear and turn the tranny slightly as your pushing it in to align splines to clutch disc.

Easy, cheap clutch alignment too, use a extension that or long bolt that fits in the pilot bushing, and then wrap mashing take around it till it fits snuggly in the clutch disc.
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Unread 05-15-2014, 07:58 PM   #3
Dedgar
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That was my first thought too, so after a week of waiting at the mailbox it showed up today and I aligned it. I can get spindle started into the clutch but it stops about an inch short of flush. Also I used the pressure plate, clutch and flywheel off the 88 motor, not sure if that matters.
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Unread 05-15-2014, 08:46 PM   #4
87MJTim
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What yr was the AX15 from? The trans input shaft sizes changed. The shaft size was larger on the early AX15s. The pilot bushing in the 4.0 maybe to small. It may need to be changed. I believe it was 93 or 94 that the changed occurred.
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Unread 05-15-2014, 08:53 PM   #5
Dedgar
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Pretty sure the tranny is the original so it would be a 88, how hard is it to change an input shaft?
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Unread 05-15-2014, 08:57 PM   #6
87MJTim
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The change in input shafts was from 91 to 92.

You want to change the pilot bushing. They're $5 - $6 from Rockauto.com. Be sure to search for one from an early model 4.0/AX15.

You can rent a bearing puller and slide hammer from many auto parts stores.

Edit:

You want the pilot bushing for the earlier AX15
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Unread 05-15-2014, 09:12 PM   #7
Dedgar
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Thanks for the info, I was figured there had to be something I didn't know.lol
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Unread 05-15-2014, 09:16 PM   #8
Caish
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We put a tranny from a 90 model XJ in the sons 88 MJ that had a ba5/10 the pilot bushing was the same, but my 87 someone used a later model AX15 and it took me a few tries at the parts store to finally get one that worked.
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Unread 05-15-2014, 09:23 PM   #9
87MJTim
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Quote:
Originally Posted by Caish View Post
We put a tranny from a 90 model XJ in the sons 88 MJ that had a ba5/10 the pilot bushing was the same, but my 87 someone used a later model AX15 and it took me a few tries at the parts store to finally get one that worked.
The early AX15 (pre 92) had the same input shaft as the BA 10. When you use the later AX15 (or a 4.0 that was mated to a later AX15 with the earlier model) you have to change the pilot bushing.
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Unread 05-29-2014, 11:16 AM   #10
Dedgar
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Ok so I haven't had a lot of time to work on this with the new bushing until today, but I'm still having a problem getting the tranny in. I have the right pilot bushing but still can't get it to slip in the right way, I got some long bolts to help line it up with no success. Any suggestions? Should I use the flywheel off the 93?
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Unread 05-30-2014, 06:40 AM   #11
87MJTim
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The flywheel should remain with the engine. The 88 is Renix; a 93 is HO. The 93 would not work without a major wiring upgrade. Think CPS.

Can you tell where it is binding up? Is it the pilot bushing or is the clutch not lined up properly? Just asking for possibilities.
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Unread 06-02-2014, 01:16 PM   #12
Paradise XJ
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Have you removed the old pilot bushing AND re-installed the new? When I looked at the pilot busing on mine I couldn't tell that there was a bushing there until I did some digging. whatever you do don't use the bolts to "pull on" the tranny...it should slip right in if you have all the right parts & pieces installed correctly.
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Unread 06-03-2014, 11:56 AM   #13
Dedgar
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I got it back in now, everything was lined up right but the new brass bushing was so tight I had to use longer bolts to slowly pull the bell housing flush, it seems ok now just need to get the shifter back in and transfer case back on. Thanks for everyone's help!!
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