I'm rebuilding a 9.25 for my Dakota. The rear came from a R/T that had been stolen and crashed. When I open it up I found that the r&p was trashed. I scavended another 3.92 r&p from a Durango. Now that I'm ready to put it back together using all new bearings,seals, and clutch pack, nobody seems to want to set it up using a used r&p. They're telling me that it would be a waste of time, that it won't last long. I see people selling used gearsets on the boards often. Am I missing something or are they just trying to sell me a new gearset? Have had 3 different guys tell me this about used r&ps.