What is this!!!

[Hoffer00]

I have a '99 GSX 5 sp with about 57,000 miles ono it. The noise becomes more rapid as i speed up. It does not seem as loud in 5 gear. I just went to auto zone and hade a CEL checked. it was random miss fire. on my way home it starts to make this loud knocking noise. Only in gear and right before I engage in to whatever gear i'm going in to. You can almost feel it in the shifter.

I had my dad rid eon the car with the hood up and he said it was coming from the general area of the transmission.

so drive shaft, drive axles, tranny?