i have a 1965 chevy c20 with a 350 and a turbo 400 tranny... it isnt running yet. but i can push it and it rolls in park... is it broken or is it just the lack of pressure?
my dad put it in like 20 years ago
a bad paw gear in the transmission will cause that too happen,with it being that old it probably needs replaced,that was a common cause for that happening to some of tho older transmissions,i own a turbo 400 in an old Chevy and its getting wore pretty bad,you might also want to check the slack in the rear differential also,that to will cause it good luck.