Im rebuilding a 72' GM 350 turbo trans. The drive shell has alot of slop on the sun gear. I measured .030 between the steel thrust plate and the shell. I checked the sun gear teeth for wear, but there good. I bought a manual to get specs. but it didnt go into the sun gear with any detail. It stated that this assembly is usually ok just to check the teeth for wear (which I did) I have no trans. experience but it seems to me that the drive shell should have a tight fit to the sun with no play at all. Is this normal or is the drive shell junk? Its like theres a missing shim or plate. Hopefully some one can give me some insite. Thanks, Paul