Thx for the info Steve, the problem that I have is that when i reach 75 m/hrs the car starts to vibrate and it feels like the engine is not switching to the next speed/gear, from 0-75m/hr I can clearly feel only 2 changes,which means that the last speed should be the 3rd. I just got 4 new tires on it, balanced them twice cause I thought that balance was the problem.
WHAT CAN I DO?