Hey guy's I'm hoping you can help me. I was praticing the other day with my 12l4 at the ware house. the floor was sllck. so I drove it out back for a sec. to see what it would be like on pave. Well it was dark I guess there was lot of pebble on the ground. after I notice my car had a weird sound to it. I check the gear and not rock were found . and Ideas. I new to 12 scale. just finally got to run. i just hope I don't have to tear her down as the She pretty well dial in. could there be a rock some were i can't see?