Dear Scotty, I have a 2011 Ford Ranger XLT supercab 4.0 V6 with 5 speed manual. 108628 miles. I live in eastern Tennessee. I have a Heads up display that shows RPM, MPH, throttle position, coolant temp, etc.

On the way home from work Friday, I recently had the gear shifter vibrating after downshifting to 2nd, going around a turn. It vibrated any time the engine was under load and throttle postion was over 55% but leveled out when on flat parts of the road. I made it home, killed the engine and restarted it. I hooked a code reader up to it, it showed no trouble codes. Took it for a drive. Didn't shake again. I changed the spark plugs on Sunday. Drove fine. Is this something to worry about?