Clutch stumper

["Jester, Chad (GEAE)" <chad.jester@ae.ge.com>]

List,

I'm stumped.  Please help if you can.

My '76 TR6 clutch works fine when the car is cold....no slippage at all.  After
a 10 mile drive or so, the clutch slips, and it begins to slip pretty bad.  I
have replace the clutch m/c, slave cyl, and red plastic hose.  All the symptoms
remain.  Any clues as to what is going on?

There is no oil leakage noted in the rear main seal area either.

TIA

Chad Jester