the donor control valve also stopped working opened it up cleaned it and made sure the springs and parts were not getting stuck(forward spring and parts were stuck) and it worked again and is still working on the original forklift. Now if i put it back on the other forklift it will work 1-2 then stop working again,(forward spring and parts will get stuck again and stay stuck) I have checked both control valve for scratces marks or anything that might make the springs and parts get stuck but there is nothing the original control valve will work on the donor forklift but once installed back it will work 1-2 then stop working will only work in reverse and yes all parts on the transmission where inspected i have also inspected all wireing no shorts or cut wires have been found