It builds brake pressure and releases the brake. The backup alarm comes on when you put it in reverse but none of the gears work forward or reverse. Ive never had in issue in the five years ive had it. I did download the service manual and it looks like theres some special equipment required because of the way the control module is setup possibly. Would certainly appreciate giving me a few things I could check first? Just seems like losing all gears at once like this is hopefully something simple you guys ran across before. Thanks
Guess, it is a ZF 4WG180, right? With module EST17T? EST25? Check signals from gear switch, check voltage to solenoids, check fuses to module.
Check fuse in cab