That's a pretty big screen to get clogged and prevent enough oil pressure
developing. Sometimes you have to change that screen anyway as it is also
the sump gasket and can delaminate on removal. When doing two ODs I bought
one, and was lucky enough to need it for one but not the other. There are
also the cylindrical screens and filters on the valve assembly, as well as
the valving and ports themselves. But all that comes after confirming it
isn't electrical.
Just been speaking to a chap who has had the opposite problem, it kept
engaging when it shouldn't. The problem was the relief valve clogged, which
as well as engaging OD everytime the input shaft turned also developed
nearly double the required pressure and bent the bolts and end plate.
PaulH.
----- Original Message -----
> There is also the filter to be considered. I'm presuming the LH
> overdrive. It's the screen/gasket located on the underside next to the
> solenoid.
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