is it possible that something just broke in or tightened up? because i remember on my rustler if i spun one wheel, it would spin freely. but if i spun both rear wheels the same direction, it would be harder and you could hear the gears like i can on my maxx. like i said, on the t maxx i could spin the spur with my finger and it would spin probably 7-8 complete circles. and if i spun it backwards like that, it would make a bell sound, spin freely a little, then turn the other way. its hard to explain by just telling it. i wish i could make a video. i thought about taking it to my lhs tomorrow and let them check it out.