I hate to do this, but apparently me and the search function don't get along so well.
I recently got my old 2.5 yj back from my younger brother who blew the engine up and swapped a 4.0l back in. The harness from the 4.0l looked like a spaghetti buffet. Obviously, he's not good at wiring. The engine would crank, fire, and spray fuel. I haven't put any time at all in trying to piece the harness back together myself. He's not much of a mechanic, but I've built race cars, late model EFI conversions, etc... So I think I'm a little better off w/ the electronics than most folks.
The current engine/tranny in the yj is a 4.0 w/ 5spd. I do not know the origin of the engine yet. I haven't had an opportunity to run the numbers. What I do have, is a donor 4.0/auto combo from an 87 wagoneer. The current owner claims the computer is shot. This is the 173hp Renix version. I've heard all of the Renix war stories and so I have a decision to make. Fix the wiring and keep the current stuff, or switch to the 4.0/at stuff. Personally, I would rather have the auto trans, but at what risk w/ the Renix?
My questions, will the 87 AW4 bolt up to any other 4.0 (Renix or not)? I do know that the Renix is the ECM and not necessarily and hard parts. Will the AW4 fit all years (post '96) or is it limited?
Secondly, if the auto from the Wagoneer will not bolt up to what ever current I6 is in the jeep, would you folks with experience rather swap everything from the Wagoneer over, or fix whats in the jeep now. The qualifier for this question is whether or not the Renix is trouble, or not.
Trash it and buy an I6 equipped jeep is not an option. I sold the jeep to my brother for $2k and bought it for $500. I added shackles, BDS lift, quick disconnects, new bestop, aux lighting, wheels, tires and other misc crap to it long before I sold it to my brother. For all of the parts on it, it's going to be much less an investment to get this thing on....errr off the road rather.
Thanks for all your help guys/gals.