RE: Is 4 lbs. to heavy for a 1/10th scale car???
Yes nitrohead and Ziggy, the tires are true and the same diameter front to rear. I also have three other sets of front tires that are .010", .020" and .030" smaller to see how they responded and all shook hard BUT after this rear differential was locked, all is good. I mean the rear diff was not pulling the car like it should have with the driveshaft taken out of the equation. Like I said, I held the car down and the clutch engaged hard and turned the spur gears but the rear tires didn't move. I have a old busted rear TC3 upper case that I use to see the ring/pinion gear and it was the pinion spinning the ring gear and the ring gear wasn't turning the yokes. JB welded it all and now we got HOOK!