I need someone to help me put a t-belt on

[EclipseGST]

Josh... Speed has nothing to do with your motor vibrating, its the balance of the rotational mass.

You could be in 3rd gear doing 60mph at 4500rpms or in 5th gear at 2500rpm and that would make a big difference on how much your motor vibrates but yet you are still traveling the same speed.

I've done this on my car, few other peoples cars without any "HORRIBLE vibrations". Its not any worse than if you were to take out the balance shafts completely. Whatever floats your boat. I just dont trust that belt to stay on and not tangle in the timing belt. Thats the only reason I have never put one on my car. Good luck.