loud clanging and one gear only

dmcg9908
07-27-2008, 12:22 PM
5-speed tranny blew-out with only 4th remaining. 1986 Z28 with 500-horse carberated 350 engine. Loud clanging down by flywheel, goes away when clutch is depressed. Stock tranny rebuilt with heavy-duty parts about five years ago. Any quick guesses? Thanks.