CJ7 Transmission question - Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > CJ Jeep Forum > CJ Tech Forum

Join Wrangler Forum Today

Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 10-26-2011, 02:55 AM
Thread Starter
mydaytona2's Avatar
Join Date: Jan 2011
Posts: 11
mydaytona2 is on a distinguished road
CJ7 Transmission question

I have a 1979 CJ7. It's the 304 v8 with the 3 speed manual.
I was wondering if there are any other transmissions that will direct bolt up to this? The reason I'm asking is because I'd like to go with a 4 or 5 speed, but not an automatic. Thanks
mydaytona2 is offline   Quote
Old 10-26-2011, 06:06 AM   #2
Dempsey's Avatar
Join Date: Dec 2010
Location: Tobacco Country
Posts: 4,958
Dempsey is on a distinguished road
To my knowledge, other than auto's, the only 2 transmissions that came in '76 to '79 cj's were the t150 and t18.

Right now you have a T150 tranny with Dana 20 case.

Option 1: T18 - They did come in some CJ's but are hard to find and expensive. Other common thing to use is a t18 out of a cherokee or larger jeep. You have to change the input shaft and modify your current bellhousing. Without a adapter you have to run the stock dana 20 transfer case. Unless you find a super rare scout dana 300 that will bolt up to a t18...or so I'm told. This option can you get a 4 speed with a granny low but your ratio in the highest gear will be the same as what you have now 1:1. But remember not all t18's have granny low (6:32:1 I think).

In 1980/1981 they switched gears and did away with the v8 and dana 20 case and everything came with a dana 300.

Later Options:
The T5 has a nice over drive gear. It could be either .7 something or .8 something. I have seen both. The negative is that T4 and T5 are considered light duty versus your current t150 which is considered medium duty. I run a t5 behind my 304 and have for several years. People will tell you that it can't happen and depending on how you drive it can be easily broken. I will probably break mine but I have a spare. I also like the later tranny options or adapters so you can run a dana 300 which is a much better transfer case IMO. It has a much lower low range of 2.62:1 over the dana 20 2:1.

Now the bellhousing of any AMC engine should bolt up to your 304 but the clutch is a different story and may require using parts from both a 3 speed and 4/5 speed kit. Also the skid plates are different and will have to be modified. Goes without saying you will probably have to cut new driveshafts.

Just a guess but I'd say about any route is going to be expensive. Between a tranny, case, clutch, shafts, etc. I wouldnt be surpised if a swap would be between $750 and $1500.
'76 CJ7
It's red.
'99 TJ
It's red too.
Dempsey is offline   Quote

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Shifting Into Four Wheel Drive And Transmission Question Allagash TJ General Discussion Forum 29 11-04-2014 11:59 PM
Transmission fill/check question wolvertone YJ Tech Forum 3 07-29-2010 10:14 PM
97 Transmission question critternator TJ Tech Forum 5 05-27-2009 06:16 PM
Transmission Question ClemsonJeeper TJ Tech Forum 7 11-11-2008 09:43 PM
Transmission Question pairomedicsfish TJ Tech Forum 9 12-26-2007 09:52 AM

All times are GMT -5. The time now is 01:35 PM.

User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC
« Back

Enter your email address:

Delivered by FeedBurner