Tranny Issues

[kEv09]

My car has been making noise from the transmission for a while now. It makes a whirring/light grinding noise when the clutch is out, so i figure this is either the the pilot bearing. It also squeaks when I let the clutch out to get going. I figured this was the throwout bearing. Am I correct in these guesses?

Also the other day at autocross my car popped out of 2nd gear twice. Once was coming out of a hairpin when getting on the gas, and the second time was on the banking of the track we were running at. I would be either on the gas or getting on the gas and the car reacted like I had put the clutch in, with the rpms jumping like i was revving the engine. The shifter would be in neutral when I would go to put it back in gear.
I talked to my brother about it and he was pretty much stumped as to what it could be.
Any ideas on what the problem could be?
I plan on replacing the clutch, all the bearings and having the flywheel resurfaced, sometime this summer when money starts coming in.

Thanks

[transzex]

input shaft bearing going bad and countershaft bearing walked out of the case a little, very common.

Wrong corner of the state :(

[kEv09]

Thanks, will it hurt the tranny to do more autocross before I fix everything?
I don't want to make things worse than they are now, but if it's not a problem I'll still run it.

Are those bearings normal to replace when redoing a clutch?
And also will lightening the flywheel give me any real advantage? I know if you go too light its hard to keep normal drivability, but will a flywheel thats a couple pounds lighter hurt this?
If it's not any real help I'll just get mine resurfaced when i do the clutch.

Thanks