Transmission Vibrations
 

So whenever i am going 120+ my car starts to vibrate and i am unsure why. Has anyone else had this issue? Any fix for it?

If it helps to know what i have done as far as performance and what not... I have trd quick shifter, aluminum 1pc driveshaft, raceseng apexR shift knob, raceseng reverse lock out... that should be all that matters since this just started recently.

Oh and before you say anything about speed i know the risks consequences and everything that comes with it. So don't try to lecture me. K Thanks.

Wheels balanced perfectly?

Did it start after the drive shaft installation? That would be my second guess.

Yeah wheels are balanced, and it didnt start until after a week had passed since i did my driveshaft. I take the car up to that speed at least once a week. After the drive shaft i had it up to that speed numerous times since i did it on a friday and i race on saturdays.