1978 CJ7 T18 Transmission Issue - JeepForum.com
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post #1 of 6 Old 04-30-2012, 07:15 PM Thread Starter
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1978 CJ7 T18 Transmission Issue

Hi there. First time poster.

I am looking at buying a 78 CJ7 that has a chevy 350 engine and T18 transmission. The transmission is noisy and the current owner says it needs to be rebuilt because it had water in the gear oil and must have a bearing problem. I am wondering what it would take to rebuild this (can I do it myself or how much does a rebuild typically cost). I am pretty mechanically able but have never opened a transmission before. Also I am considering changing it to an automatic but I don't know what transmission I would need for this to work best. As for use, I am planning to be able to drive this on the road, and light to medium play on the trails and in mud. Any advice is much appreciated.


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post #2 of 6 Old 05-05-2012, 12:31 PM Thread Starter
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SO I ended up buying the Jeep. I got the trans pulled out last night and pulled the cover and there is some surface rust on a couple of the gears, and there is a LOT of slop in the input shaft bearing and where the input shaft connects to the main shaft. I have decided to stick with the 4 speed, but I am going to replace the clutch, linkage, and all the rest while I'm in there. The local trans shop wants $550 just to install the bearing and seal kit (unless it needs something else in addition). I still haven't decided if I should try this on my own. Other option would be to buy one off Craigslist or something, I found one not too far away for $400. I feel like I could probably do the rebuild myself, but I really don't want to mess this up.... Any advice???
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post #3 of 6 Old 05-05-2012, 10:16 PM
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It is pretty hard to mess up a T18 rebuild. Go for it.
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post #4 of 6 Old 05-05-2012, 10:33 PM
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1995 ZJ 
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The t-18 is a great trans and as far as building a 4spd manual they are probably one of the easiest. You should at least get a manual in case you get stumped by something. It would be good to have a buddy around to help or provide opinions and moral support haha. If you dont find a manual, then search the internet for write-ups and pics, might be handy to have that stuff before you jump into it.
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post #5 of 6 Old 05-07-2012, 04:24 PM
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There is a write up on the internet. Make sure you use a wooden dowl rod for the bearings, it makes it easier. Its not very hard if you are mechanically inclined.
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post #6 of 6 Old 05-07-2012, 08:05 PM
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1981 CJ7 
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I would rebuild it myself if I had the ability to, otherwise I would get it rebuilt for the $550 the shop is asking. If you psend $400 on another you might just end up with someone elses problem that needs to be rebuilt.
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