Stop in for a cup of coffee

Old 29 truck transmission has been growling real loud in 1, 2 and reverse since I'v'e owned it and never any metal shavings in the gear oil.
Friend of mine on FABO had the same problem with his 31 and he shimmed the top of the bell housing to the engine and solved the problem. Got my manuel out and sure enough .010 inch shims were missing. Hope I fixed it today.