Transmission interchange

[cj847]

I have a 2004 4x4 with 86k miles. Yesterday, cruising the freeway it went clunk and shifted out of overdrive. I pulled over, turned if off then back on. It will not move.....it's not even in limp mode.

Codes are P700, P740, P715, and P734. I was hoping it's just a solenoid issue, but usually you at least have a limp mode in that case. It acts like a busted input or output shaft.

I've not seen many issues with this transmission at this low mileage.

Transmission has not been pulled, but the diagnosis from the ****** shop is a failed torque converter or front pump. Complete rebuild $1750.....

Due to high cost and apparent easy availability of this trans I called the salvage. According to their computer the 2003-2004 are the same and the only interchangable versions. So, my question is:

-Is the transmission control module seperate from the engine module on this vehicle? (ie I'm trying to find a way to put a 2013 42RLE from a wrangler or other in my 2004 Liberty...you can't find a low mileage 2004 ******).
What keeps me from using a generic 42RLE as a replacement?

 

[dude1116]

I think I actually got my used one out of an '05. Not completely sure about that though.

 

[04Liberty]

P0700 is generic trans fault
P0740 TCC malfunction
P0715 input turbine speed sensor malfunction
P0734 is gear ratio error in 4th

Almost sounds liek a speed sensor went on you and now you aren't getting the matching inputs the computer requires.

 

[cj847]

The rest of the story:

The torque converter failed and the debris stopped up a hole to the pump, then the trans just ate itself. Even the planetarys were toast. Complete rebuild, I think they re used about 10 parts from the old trans......everything else is new.