Can the 3.4 motor be made to work properly with the 3.0 auto tranny?

I keep finding conflicting info and nothing definitive.

Anyone got a link to such a build?

ORS instructions say no but that says with their "kit" too.

Thanks.

 

I would think if you properly match up the wires you should be okay???
Or if you can find an auto out of a t100 it will work??? maybe???

 

Yes it is possible. I had a A340h in my 1992 3.4 swapped rig. The only catch is you need to run a T100 ECU due to the output shaft speed sensor signal (not the vehicle speed sensor).

I will say this, my transmission lasted about 1 year before it could no longer hold the torque in 1st gear. I did swap out to a T100 transmission to cure the tranny slipping.

edit: I did add the supercharger after the A340F was installed, it was off one of my previous swaps I had sold. The 1992 is my 4th 3.4l 4runner but my first auto.

 

old post bump, but I wanted to clarify if I could.. You only need to use the ECU from the T100? Or do you need the entire wiring harness? If I purchased a motor out of a 4Runner and then the ECU from a 97 T100 would that be compatible?

 

you would need the correct plugs for the t100 ecu, and then repin the harness, but yes.

 

so i'm putting together a parts list for my 3.4 swap.. so far it's this

3.4 motor with wiring harness attached.

material for the custom crossover pipe

the oil pan and pickup tube from my 3vze

ecu from a 95 or newer t100 (my current transmission is the a340F cuz my 4runner is a 95)

and of course misc wire connectors and jumpers. is that it? am i foregetting anything?

 

you shouldn't need any extra material for the crossover. When you pull the heat shield off, there will be 2 noticeable lines before and after the flex part. Cut there, and then follow the rest of the sticky thread that explains how to do the crossover.

Oh and get a build thread going!

 

More on the transmissio, If i get a t100 with an auto tranny and mate it to my 3.0s manual tranny and use the t100s wiring harness and ECU will i have any CELs or problems?

 

If you have the T100 stuff leave it automatic. My bud Jon has a 94 4Runner with a T100 swap and it is sweet. No issues whatsoever.

If you aren't going to use the T100 auto tranny/tcase, you should sell the whole combo for big $$$ and just find another donor for staying manual IMO.

I got 97 auto donor.
Purchased 97 MT ecu and harness.
Using 3.0 5 spd tcase.
Should have no CELs.

:wabbit2:

 

We've been having this discussion on and off for a good 5 years now in this thread:

https://www.yotatech.com/forums/f160...-a340h-128200/