Well I was trying to beat my max speed in my Corvette C5R, it has ALL the mods and I was just fine tuning it, and I don't know exactly what I did wrong, but I think its the gear ratios. Whenever I reach sixth gear the speed starts dropping, I can keep it in 5th and it will keep rising slowly, but major redlining. Can someone explain to me what I did wrong and how I can fix it ?