Part # on input shaft I bought from you guys is etched right into BEARING surface ?? ,,,[NV25356HD [ your # assigned ? QU52170. I did LOT research ,thinking I would be Upgrading to one of Your mainshafts But seems you've concluded [ I could be wrong ] that the Good ones [at Least press fit bearings ] no longer available ? ? Weddle would prob make you some ,but likely $$ and in Australia,, guess not enough out there , getting old Mine [95 dodge /cummins 4x] apparently not worked hard [249k] ,appears orig. 5th gear still tight,press /no fretting [redish residue Isn't Rust it's parts making metal w/each other] ,, so reusing .... [pisses me off because is some wear pilot nose bearing],, agree with [ Dan's ] earlier shaft article ,,, [think ideal maybe 2/3 spline /smooth portion press fit ,,even if just on tips splines of 5th .... Guess I'll pull input and see if will polish off in my lathe ,,[felt pretty deep w/fingernail,,,,of flip bearing / hope pilots right on splines and washer has heat treat....I'm also correcting alignment of cast iron tail housing dowels ,,,this one I got from NY is .010 high , and .010 to left [prob run,about on bubble if actually a upgrade at that point] I made dial indicator tool that screws into the shaft ... I'm semi retired aircraft accy tech . Don W