I'm using a Quick Time bell housing, I dialed the housing to within .002 I think,(I could look that up), It's not so much a vibration (sorry) as a noise of gear or bearing chunking mainly in the tail end (output) area. The pilot bearing is a retro fit roller bearing. If I clutch it the noise stops but when the trans and oil are hot there is a heavy loaded gear howl in any gear. When the car is on stands and the wheels are turning the sound is like there's rocks going thru the gears but when driving it's mainly a gear howl. The trans is out now and going to the shop to be disassembled for inspection. If the gears and the output ball bearing look OK I'm going to put her back in and drive it till it blows, then I'll know whats wrong,,LOL
