HI.

I am attempting to swap the 4t60e from my bonneville to my park avenue. The Buick'* case in broken just before the differential housing and I just rebuilt the one from the bonneville.

The harness under the valve body pan have different color wires and the buick has a temp sensor that the bonneville did not.

I am hoping/wanting to swap the buick valve body to the pontiac transmission in the hopes that the ECM will think the trans is the same one.

Will this work? Any tips tricks thoughts on this?

I have never rebuilt a transmission before but I am too broke to pay someone to do it for me and I also have always wanted to know how so I jumped in with both feet and now I am done except for the valve body. I have the rebuild kit and don't know which valve body to put it into.

Thanks in advance.

If I were you, keep both trans intact part for part and just swap internal harnesses.

And if you can, take a picture of both the trans ident tags. Which looks like this one...

ok, the tag from the Bonneville is completely blank except for the stamped numbers in the upper right corner, it is an Illinois car with lots of salt cancer, but the Buick has a legible ID plate.

I am just worried that the wires would not match up properly to solenoids since one has no temp sensor and the other does and the wire colors are different.

If the donor trans does not have a temp sensor, your PCM will need to see it. Like I said, transfer your Buick harness over to the donor trans.

Use this manual, it should help you out.

http://www.3800garage.com/4T60-E.pdf

Awesome!! Thanks.

How about the torque converter? Use the one that came with the donor transmission?

I don't see an issue between the 2. Go with one you know works.

[QUOTE=Mike1995;1606375]If the donor trans does not have a temp sensor, your PCM will need to see it. Like I said, transfer your Buick harness over to the donor trans.



Easier said than done Mike......there could be some other circuit issues created by doing it....we are in that '94 vs '95 transition year, as far as PCM'* go....

Unfortunately, I don't have wiring diagrams for both years...

Here is the ID tag off the exploded 4t60e.




Here is the damage.

ID tag off donor



Not sure if this will help. Donor case.



Exploded case.

Duct tape?