Calgary Jeep Association

4x4 Related Groups => Tech Talk => Topic started by: mrbeggins on October 11, 2007, 02:37:47 PM

Title: Jeep automatic transmissions
Post by: mrbeggins on October 11, 2007, 02:37:47 PM

Can anyone tell me if the automatic transmissions that are hooked up to late 80's and early 90's 4.0l and 4.0l HO's are any good. Also, what is the number of the tranny. Any particular one to stay away from? Putting a 4.0l HO in an 87' YJ and am thinking of putting in an auto instead of a manual.

Title: Jeep automatic transmissions
Post by: cablesmurf on October 11, 2007, 06:07:02 PM

Yes they are good...AW4 auto tranny. Stay far away from the 42R and 42RE that came in the Grands. They are problematic. Get one from a 91 and newer XJ and you'll be fine. You'll have to do a little work to get it to mate up, but it is do-able.

Title: Jeep automatic transmissions
Post by: calltrex on October 11, 2007, 06:18:00 PM

the 999s are good but only 3 speed

Title: auto trannys
Post by: mrbeggins on October 11, 2007, 08:54:13 PM

ok, - thanks for the info guys.