Originally Posted by nutz4rcyktw
Running seven cells you may have damaged the internals in your transmission. It should be inspected to determine if you have anything wrong there. It sounds like the battery is not charging correctly and false peaking is usually a sign of that. Have your local hobby shop put a volt meter on the batt and also get a temp guage and see if it is over heating. If it has been overheated, it may be damaged and not produce power again as it did in the past.
VXL's have all metal transmissions and are built to handle 3s power, so 7 cells isn't gonna be very straining on it. Its highly doubtful that the cause of his problems are in his transmission