Well I hope it's not the rear main. It never uses a drop of oil, the engine was rebuilt about 20,000 miles ago. I guess it wouldn't take much leakage though to make the clutch chatter.

Thanks for the advice, I will check this out as well.

Iron Clad

1960 Chevy Apache 1/2-ton
1965 Chevy Half-Ton Suburban
1966 Chevy C60 2-Ton

Stupid is as stupid does. - Forrest Gump