Mine does the same thing,,,it always has. Mine stayed noisey after I replaced throwout and clutch. Then figured it was bearings in trans. That was a 50,000 miles ago. I think that big 5 speed maybe is normal to be a little rumbbly. I'm alway keepin my eye out for a spare MT.
Seems that the MT s I here about usually go out by not shifting out of 4th,,something like that. The trans experts will hopefully jump in here. Mine has 250,000 on it. One though unit.

Last edited by KrzyDav; 05/10/12 12:09 AM.

dave h.
'89 Raider V6 5spd;Aisin Hubs;; Gen2 LS: frt. brakes, rear coils;U.C.arms;R.trailing arms;idler arm; rear LSD axle w.disc brakes ;2 battery system for Dog's fan; relocated ECU; custom bumpers;J.Baker receiver;Conferr roofrack; t-bar crank.