I have a 54 Buick and low band went out. I have taken the trans out and apart to find my front pump has worn a groove in the backing plate. Anyone else ever had this prob? This is the second time this has happend to me. Is it ok to machine the plate down and reinstal? I got a quote from a local machine shop to make me a new one and they want 700$. Desparate, looking for help. Will buy a new trans if you have one.