I have been doing a lot of searching on this and was wondering if you old xj jeepsters could help me out

This is what i know (or think i know)

The Jeep AW4 is made by Asian Warner and is remarkably similar to the A340F

internals and solenoids similar a340H (tcases aside)

The Jeep AW4 uses a transmission control Unit (TCU) to regulate all solenoids.

The solenoids are very similar (possibly interchangeable with a340x's)

here is the question...

I am about 2 weeks away from putting a 1UZ in my 1994 4runner, can I wire an AW4 TCU to control my transmission (a340h) instead of having the 1UZ ecu try and interpret/send the incompatible signals? This is a wiring diagram for an AW4 with Economy/Power switch similar to our transmissions.

http://www.greatlakesxj.com/tech/TCU4.jpg

AW4 TCU inputs:
TPS
Brake switch
economy/power switch
12 v (switched)
speed sensor


I’ve seen Lextreame.com uzswap.com but never heard anyone speak of this option. Am I just thinking about this wrong? Thanks!

 

very interesting question. i'll be watching for an answer

 

Well if I'm not mistaken you have left out the fact the the ECT is connected to the ECU. The info I found is that ECT takes signals from the ECU to tell when to shift the transmission. There are only a few wires that actually are connected to it, basically two speed sensors, a pressure sensor, gear lever position and solenoids? Iwould also like to know if the signal are different, seems unlikely but who know.

 

I cant recall the website, but a guy made a manual shift control box for both the jeep and the yota transmissions. Its 100% pushbutton or joystick setup and works very well afaik.

 

The solenoids are very similar (possibly interchangeable with a340x's)
Yes they are.