my 99si has been having problem and I don't know why it's doing it. But the car when I take it all the way up to redline and I shift the the car just sits at 7,000 rpms until I let go of the accelerator? I've got the tranny check out and they said I still have 60% left on my clutch?

 

If I'm reading you correctly sounds like the clutch is going bad. SI's are known for that.

 

you can have 60% like you say you have and the clutch will still slip... best bet is to get a stage 3 clutch and be done with it ....