loseing power steering and braking assist
 

i have a 2002 dodge cummins 24v with the 5.9 4x4 and i recently replaced the powersteering pump and gear box and like a few days off and on when I let off the throttle the power steering gives out and I lose the breaking assist at the same time then when i get back on it it starts working as normal so its just when I let off the gas but its not all the time anybody know what this might be I will take all the help I can get