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Unread 06-19-2013, 12:36 PM   #1
drifts14x
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Worth rebuilding transmission?

So, I'm looking at buying my first Jeep. My father has a 95 YJ, and I love it, so I decided to look for one of my own.

I found a 1988 YJ, 4.0, 5-Speed, that needs some work, but the price is very workable.

The issue is, the truck has a bad transmission. Apparently, it pops out of gear, and sometimes, won't go back in.

I assume it would have the AX15, and I need to know, how much something like that would cost to entirely rebuild, or replace with something similar.

Is it worth digging into this jeep?

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Unread 06-19-2013, 12:59 PM   #2
Reddy89
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It should have the AX15, considering he went through all of that trouble to swap in a 4.0 he would've put a AX15 behind it. (Make sure it is indeed the 4.0 and not the 4.2)
Around here you can find a used AX15 for $300, but you can also consider getting it rebuilt, there are plenty of threads around here for a DIY.

Make sure you go over the frame with a screwdriver.
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Unread 06-19-2013, 01:11 PM   #3
drifts14x
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How would I know the difference between a 4.2 and a 4.0?

Also, why would I want to avoid a 4.2?

Glad I asked. I am definitely going over it with the old screwdriver, but if it's a 4.2 and that's a bad thing, I would like to know why.
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Unread 06-19-2013, 01:14 PM   #4
89yjislanderr
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what reddy said. are you certain its not a 4.2? they didnt start the 4.0's till 91 i believe. if it is infact the 4.2, then its got the peugeot transmission in it, which is a piece of **** anyway. if the jeep is a doable price, id get an NV3550 5 speed transmission to put in it. you can get all the adapter pieces you need to put it in on advanceadapters.com.
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Unread 06-19-2013, 01:22 PM   #5
89yjislanderr
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unless the current owner tells you he put a 4.0L in, its a 4.2L engine. also, the 4.2 is carbureted while the 4.0 is injected. so if it has a carb, its a 4.2. and the 4.2 isnt a bad thing, its just less efficient and less powerful, because its carbureted. i run the 4.2, and have no issues.
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Unread 06-19-2013, 01:35 PM   #6
drifts14x
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Good to know.

I was definitely not aware of the engine difference.

I don't really care that much about the power (if it goes highway speed and handles crawling, I'm not going to ask any more out of it).

But the NV3550 conversion is going to factor in heavily.

I was thinking that it would be no big deal to get a factory rebuild of an AX15 (my dad's 95 had to have that done).

Would it be easier to just put an automatic gearbox in it?

Thank you for the advance notice!
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Unread 06-19-2013, 01:37 PM   #7
UZI4U
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The AX-15 will have the drain/fill plugs on the driver's side. The frog tranny has them on the right. If it's a frog tranny, you will need to swap it out with an AX-15, unless you want to replace it again.
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Unread 06-19-2013, 01:46 PM   #8
89yjislanderr
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I wouldn't get an auto tranny. Takes a lot of the fun put of jeeping in my opinion. Either the ax 15 or nv3550 transmissions will do you good. If that's the only major issue with the jeep, I'd definitely go for it
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Unread 06-19-2013, 02:55 PM   #9
drifts14x
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Well, this is no spring chicken. It has no A/C, will need some light body work and a paint spray, but overall, it could be a lot worse. I'd like to say I saved one, but now I'm going to have to see if I can get him to be very flexible on the price.
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Unread 06-19-2013, 03:41 PM   #10
89yjislanderr
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Yeah, that's pretty much the same story with my 89. No ac and some dents and paint blemishes.
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Unread 06-19-2013, 04:35 PM   #11
stratostix
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Plenty of used good running AX15's out there. I got my most recent one from a cherokee with 88k miles on it for $300. Sold my original ax15 with 193k miles on it for $200. Quick swap and ur in business. Cheapest/best way to go imo.
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[QUOTE=Anticanman;14148985]If they're gonna bend you over for that much, I'd definitely pay extra for the lube!![/QUOTE]

Jeep Build thread:

[url]http://www.jeepforum.com/forum/f12/94-yj-build-thread-1234264/[/url]
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Unread 06-19-2013, 05:33 PM   #12
Reddy89
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You need to decide whether you want a carbureted (4.2) or fuel injected (4.0) engine.
Post up some pictures if you can!
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Unread 06-19-2013, 05:49 PM   #13
Anticanman
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Quote:
Originally Posted by UZI4U View Post
The AX-15 will have the drain/fill plugs on the driver's side. The frog tranny has them on the right. If it's a frog tranny, you will need to swap it out with an AX-15, unless you want to replace it again.
For some reason I thought my ax-15 had the plugs on the passenger side.

Edit: Max seems to think so too.

http://www.jeepforum.com/forum/f12/b...change-865520/
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Unread 06-20-2013, 07:30 AM   #14
UZI4U
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Quote:
Originally Posted by Anticanman View Post
For some reason I thought my ax-15 had the plugs on the passenger side.

Edit: Max seems to think so too.

http://www.jeepforum.com/forum/f12/b...change-865520/
Excuse my alcohol induced dyslexia.
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Unread 06-20-2013, 09:43 AM   #15
Anticanman
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Quote:
Originally Posted by UZI4U View Post
Excuse my alcohol induced dyslexia.
Must be an early drinker. No judgement here.

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