> -----Original Message-----
> > A leaky actuating valve in the overdrive could also
> prove fatal.
>
> Gotta be a pretty strange leak, since the A-type valve
> actually bleeds oil away from the clutch pistons.
> A blocked relief vent can cause the OD to engage "by
> itself", but usually only when the car is moving at a
> fair rate of speed (and hence the OD pump is putting
> out oil). Not likely to happen with the car stopped.
Good point. I'm forgetting everything I thought I used
to know about the A-type OD. Yep, the relief valve stem
is hollow. So if the ball valve is leaky, the pressure
from the accumulator will still return to the sump
through the valve stem. Hence, no engagement.
Shame on me. :-(
-Mark
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