my 743b rear right tire locked up sounds like chain was draggin in case. found easiest way to fix was to drop the whole case out of machine. got everything out tonight, 2morow morning im gunna open it up and investigate more. my qustion is does anyone know a good web site to buy final drive parts? im probely going to need final drive chain and couple axle seal kits i noticed i have 2 leaking. also if anyone has any good advice. there was no way to get into chain case without droping it out of machine.it wasnt as bad as i thought it would be but i learned alot from an older post it helped out big so any advice would be great and where i can buy final drive parts? thanks