yea! Both the buggy and truggy race roller have the grinding feel in the rear end. I took mine apart to see if I could remove a spacer from the pinion shaft, but it didn't have one. After two gallons it has greatly broken in but it still has a little grinding feel. It is slowly going away. After every race weekeng I take the case apart to clean out any shavings then regreese the ring and pinion.