Funky Overdrive, Pt 2

["Thomas Pokrefke" <pokrefke1@comcast.net>]

I cleaned the filter at the bottom of the overdrive, and removed and cleaned
the pressure relief valve assembly.  I refilled the transmission with fresh
Castrol 20w-50, but I am still having a funky problem.

The overdrive will engage normally, and when I disengage the overdrive, I
feel the 'thump' associated with the overdrive disengaging.  However, with
the throttle closed, the overdrive will "free-wheel" rather than compression
brake.

What else should I look at?

Thomas James Pokrefke, III