In Reply to: Just bought.......... posted by dave#1 on June 04, 2017 at 21:17:59:
Hopefully you luck out like I did on my 640. The trans needed dental work and when the gear teeth break on the top cluster the broken pieces fly and drop down causing a trickle down effect and usually bust out gears on the bottom cluster, luckily it missed the input shaft into the trans on the Sherman. Some of the gears are the same as the 8n so with parts tractor around are easily replaced just a pain to double split.
Good luck with it