Shifting problems My car is a 2006 Hyundai Tiburon, Automatic, 2.0L 4 Cylinder I've had the car two years I don't know what's related and what isn't so here is the story. Bought car, (cruise control did not work) but everything else seemed fine, engine light came on code read Vehicle Speed Sensor so I bought an input and an out transmission speed sensor and had them installed, Motor blew 2 heads had motor replaced with an almost new motor. Cruise control now works, three days later car would not come out of park shifter moved but car stayed in park felt like shifting cable let loose, I called a backyard mechanic friend and he moved the shifter hard and it went into drive said probably buddy who changed motor forgot to unhook cable and stretched it (made sense to me) it did this everytime car was put into park had to yank on the shifter to get it to shift so I started parking her in neutral and it never messed up, after 3 weeks my new shift cable came in so I went to show my mechanic what car was doing it wouldn't do it worked fine, told him I'd call him next time it messed up this is a year and a half later hasn't messed up like that again! I had already bought the cable so I decided to have it installed anyways even though problem seemed fixed went to a shop they told me nothing is wrong with my cable..... Approx 6 months ago put car into drive and started driving the car reved out (I call it) motor got really loud and RPM gage went to 4K and car jerked really bad and made a really loud snap noise so I pulled over and roughley shift car into park and back into drive and drove this fixed the issue for that drive anyways.... my car one day over heated to red line in a 5 minute drive in the winter my mechanic said must be an air lock so he drained my fluid and replaced ect, next day car wouldn't start, blew starter, replaced that, next day driving car and in a 5 minute drive it overheated to red line took car to shop he said gage is reading wrong car is barely even warm so I decided to take the car home and worry about this issue pay day well the next day car wouldn't start, blew alternator, at this time my mechanic looked over car more closley turns out I had a bad ground so he put on new alternator and new ground, this was a month ago and no more issues with overheating or not starting. However I still have this issue (copy and paste) "put car into drive and started driving the car reved out (I call it) motor got really loud and RPM gage went to 4K and car jerked really bad and made a really loud snap noise so I pulled over and roughley shift car into park and back into drive and drove this fixed the issue for that drive anyways...." After having ground put on and shifting issue still there I took my car directly to Hyundai they ran all their computer tests and transmission tests and took car for a test drive car worked fine and only code that came up was Vehicle Speed Sensor. So here is where I stand first question how many speed sensors does my car have is a transmission input/output speed sensor different then a vehicle speed sensor? I looked on parts sites and only speed sensors I find are ABS speed sensor and Vehicle Speed Transmisson Sensor, so maybe sensors I bought are no good but they were bought new or maybe the connector for the sensors are bad? I don't know any suggestions would be greatly appreciated.