The capstan running when the tape is sitting idle is normal. It shouldn't take much clearance for the capstan to lose grip on the tape. I have a R8 that needs a capstan motor. R4322-74452A if anyone knows where I can find one that doesn't require me to take out a second mortgage on my house, lmk.
I need one of these, but need to find one that's not gonna cost me my first born male child. If anyone knows of a cross reference replacement, or know of one that is reasonably priced, lmk.