How hard is it to change out a transmission? - JeepForum.com
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Unread 04-23-2013, 06:52 PM   #1
Guns003
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1995 YJ Wrangler 
 
Join Date: Dec 2012
Location: philadelphia, Pennsylvania
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How hard is it to change out a transmission?

Ok so i have a guy that wants to trade a 1987 YJ for my 1979 F150 but it needs a new tranny. He bought a AX15 and transfer case for it just hasnt installed it. What do i need and how hard is it to do a tranny swap? What should i check to see if everythings all there?

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Unread 04-23-2013, 07:59 PM   #2
fuzzy89
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if you have the tools its fairly easy just undo the drivelines, 2 floor jacks under transmission and transfer case, unbolt from bellhousing, take clutch off if internal or fork out if external. as for what to look for im not sure on the AX15, i took out my pugeot and np231 first thing and put in a ford Np435 Np208 so someone else will have to chime in there
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Unread 04-23-2013, 08:18 PM   #3
Guns003
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Quote:
Originally Posted by fuzzy89
if you have the tools its fairly easy just undo the drivelines, 2 floor jacks under transmission and transfer case, unbolt from bellhousing, take clutch off if internal or fork out if external. as for what to look for im not sure on the AX15, i took out my pugeot and np231 first thing and put in a ford Np435 Np208 so someone else will have to chime in there
Yea my dad has everything tool wise. But a AX15 will just bolt up to 258ci right?
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1995 YJ
33s, 5.5 inches of lift, RE 4.5 XD, Bilsteins, MORE body lift, Bumpers,TJ flat fender flares, HD steering, Durango steering box, ZJ 136amp alt
Soon to be on 35s with d30 and 8.8 with 4.10s
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Unread 04-23-2013, 08:36 PM   #4
Idaho_Chad
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It looks like you'll be able to find everything you need to know here:

http://www.jeepforum.com/forum/f19/y...ite-up-312203/
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Unread 04-23-2013, 10:23 PM   #5
rambo3489
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It's actually pretty easy. I did it with a buddy with not very many tools. Take your time don't rush and take lots of pictures and it will be a breeze. TRADE UP!!

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Unread 04-24-2013, 07:25 AM   #6
JeeperDon
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Hard/Easy is a subjective question. Look into yourself grasshopper. Do you have the inner vision to fully understand how the drive train is assembled and installed? Do you have a tool box bigger than you can carry? Do you have the balls to take on an adventure that seems daunting? Do you have the time to screw it up completely, since this is your first time, and have the project take weeks rather than the usual same day?

If any answer is no, well, nothing we write here will help.
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Unread 04-24-2013, 07:33 AM   #7
Fenix85182
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Quote:
Originally Posted by Idaho_Chad View Post
It looks like you'll be able to find everything you need to know here:

http://www.jeepforum.com/forum/f19/y...ite-up-312203/
Read this thread thoroughly, as this guy did it right.

I didn't know about the change in input shaft size when I went from an AX-15 mounted to a 4.2 to an AX-15 mounted to a 4.0 when I did my tranny swap years ago.
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Unread 04-24-2013, 08:23 AM   #8
Berniebikes
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Not sure what the seller has acquired regarding the new AX15 and bell housing but there may be some issues. The BA10 you are removing had an internal slave and a 21 spline input shaft to the TC. Depending on the new AX15 you may have to modify the input shaft to the transfer case, change the pilot bearing, and adapt up the clutch slave lines from an internal to external swap. AX15s came with both an internal (earlier ones) and an external (change over in 92 I think) slave. You may also run into access problems reaching the top two bolts on the bell housing, and they may be torx bolts as well making their removal difficult. Other than that just dropping one tranny and putting another in its place isn't too hard. Read the swap thread on the FAQ page as it covers everything. Length between the two assemblies is the same, so drive shafts and the like will all fit without modification. My only other real advice is do not support your engine with just a floor jack. Use jack stands to keep the rear of the engine from rotating while you pull out the transmission or you may find you are replacing engine mounts, front clip and radiator if you let the engine rotate.
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