The r150f, I finally found some info on, is making a grinding noise while in gear. I figure it is somewhere on the output shaft as it will make the noise with the speed of the vehicle. I would like to rebuild it but I need my 88 on the road as it is my only vehicle available to drive back and forth to work every day. Is it possible for me to swap out the transmissions for a couple of weeks while I spend my spare time rebuilding the r150f? Would it cause any problems I am not aware of? I have searched for used transmissions but I cannot find any cheap ones. I cannot afford 1200 for a transmission at the moment.