it sounds as there is definately a problem other than faulty rebuild. there could be mistakes made in the rebuild that contributed, but this is not a common problem, i dont think. i am clueless but hoping someone with experience will pick up and help out.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.