Sign into an existing account

...or do I have to figure this out on my own?

I've narrowed down the "suspected" source of the shift problem and would like some corroboration as to whether or not I'm in the right field, I'm hoping that it's only a matter of cleaning the valve spool and the oil passages inside the shuttle control valve housing. Upon removal of the vent on top of the housing I noticed a lot of grit inside due to a collapsed screen filter which I'm thinking that the dirt is hindering the directional flow of oil to the forward/reverse shuttling.

Anyone?