I took the vehicle in services and close to 100K and the transmission had to be replaced--but when I'm driving and I need to pass a vehicle or just speed up because I want to when I bear down on the throttle nothing--the vehicle doesn't drop to a lower gear like in normal vehicle in those situations--it seems as if the transmission slips but no exactly--also the vehicle sounds/feels like its under heavy strain but nothing happens...and I'm not sure if it did this prior to the transmission repair of not--I case I never had a need to try it