I ran my friend last night, he has a 95 TT Supra BPU++.. I pulled him first, second, and when I shift to 3rd, the car went into 5th.... I did this 2 times last night, then the last time I did this, the engine just completely sounded different, the engine seems to be misfiring, no engine check light on, any suggestions? Thanks!!

 

um...learn how to shift? You probably broke ur 5th gear synchro the last time u did it.