alloffroad

Hey there. I have owned my pp t100 for several years. It was a new ebay purchase. I've run the daylights out of it but now something is not working right. When transmitter and receiver are on and i try to give throttle it won't move. The electronics whine but no movement from drive motor. The steering servo works. I tried switching steer and motor on the esc but same issue. The throttle turns the wheels but steering wheel will not make motor turn. So instead of continuing the cat and mouse chase i opted to just upgrade to a brushless system. I purchased a motor/esc combo on ebay, new lipo battery and charger and transmitter to match. Also a set of new pinion gears. I will need to upgrade the spur gear to metal and with than the drive shaft because of the difference in mount on the metal spur. Is this right or am i missing anything? Thanks folks.