ZF6 cooler pump
Ok, I have done some research but can't find anything.
I have a ZF6 and recently added the DieselSite transmission filter. I ordered the pressure gauge with it but I never get a reading. I have disconnected the lines with the truck running but I do not get any flow.
However, my fittings were leaking (did not have enough teflon tape) and the lines had fluid in it. The general consesus is that the pump runs when the engine is running but it seems to only run with the truck in gear. I have done everything short of putting the rear on jack stands and putting it in gear.
Is anybody here familiar with these pumps and how they operate?