That's what I've been hearing about the Ford diesels. They've had to de-tune the Powerstroke engine cause it twists up the trannys. I looked at the Chevy's and they have an Allison transmission that is used in delivery trucks and is built to take it. The Duramax diesel is built by Isuzu who builds more diesels than any manufacturer in the world. (So they tell me)

This probably isn't much help to you though.