Here are some new problems.
This past weekend when I was racing, my Pro 4 all of a sudden wouldn't move any more. One of the rear wheels would spin freely. (Is that a word?) I took the rear diff apart and found out that the diff bolt head had totally broken off. I didn't have a replacement, so I replaced it with Associated's T-Nut thrust bolt, part number 6575. It went together fine and functioned properly. A few runs later I heard a spoadic clicking sound that sounded like it was coming from the rear of the car. I checked the spur and pinion gears and they were fine. I also took apart the front and rear diff and all the gears looked fine too. Does anyone know what could be causing this?
P.S. I haven't run the car since I took it apart and put it back together.
I also bent a front dog bone, but that's another story.