I was driving my car on a golf course but then i noticed it sounded funny so i turned it off. the next day i picked it up of my rc shelf and spun one of the rear tires but the other tire wouldent spin. i chanded the spur and pinnion but it didnt do any thing
Sounds like your diff may need attention pull your trnny apart inspect it and repack your diff with grease or what you like. See what you have after also check your out drives. Hope you figure it out.