My son competes with a SB stroker/TF combo in a lite wt roadster [~1900#] and has been experiencing many problems with the Griner transbrake valve body. We have several TB solenoids to work with & all can be made to function properly on-the-bench, but then act erradically [hit or miss] when installed in the vehicle. The solenoids will periodically stick and the car "creeps [LOL!]" thru the beam....

Both the solenoid & the TB valve body look like proprietary pieces, & would not be easy to duplicate even by a competent machine shop [which we have].

Any suggestions or shared experiences with this stuff?