I bought one of these for my savage online and not from ebay, I'm very dissappointed with it I have no idea what the deal is, If you turn the wheel lock to lock real fast the servo will just sit and do nothing , once you stop moving the wheel quickly the servo will move to the appropriate position. Also here is another weird one, the servo responds funny when i give it full throttle at the same time as im trying to turn the wheel. I havent looked into it but maybe too much of a current drain on the stock radio equipment in the truck. I was using fresh alkaline batteries.