I was noticing this weekend that when I accelerate hard through 4th or 5th, and reach approx. 100mph, I start smelling something. Seems like a slight burning odor. I don't know if its the clutch or what.

I'm not a rookie with a man. trans, and I don't slip the clutch much, especially at high rpms. I just noticed this for the first time this weekend, and it happened both times I accelerated hard up to 100, but I don't notice it when I accelerate up to say 80-85mph. It really seems to only happen once I reach 100??

Whats the deal?