BurbMan wrote:
Marty a 6L90 would be nice for sure, but I don't think the electronics are compatible...I'm sure it could be done with a custom tune tho....hmmmmmmmm:h:h:h
There fixed it for you! might be worth asking about if you have to come up with any money.
I was about to put a BUILT 700R4 behind some of my th400's in the past, but got rid of both. That trans of all things is the ONLY auto I have had go over 150K miles! That was in an Astro van. It has better/lower first gear ratio vs the th400/4L80 that you have. This is why you could be killing the trans as it did me. Not low enough of a ratio. I have heard of putting the 1st and 2nd gear from a 4l60/700r4 into the th400/4L80 body also with good results. This is an off roaders trick to getting better low speed control.
Marty
