Squeeling In first 3 Gears

I just bought a 1988 Saab 900 S, it has 117,000 Miles and seems to be in pretty good shape, but I have noticed that when in the First 3 Gears it squeels (except when clutch is applied) Sometimes in 3rd gear I can stop this by pressing clutch for a second then releasing when the squeel goes away, or I can just shift up to 4th to get rid of it. I remember the guy mentioned something about a problem with a belt in the car, but I dont remember if this is what he was talking about, or if its unrelated. Can anyone tell me why this is happening and how it can be fixed?

Thanks!

Dave

I am not sure, but in my previous car, a 94 9000CD, there was a little squeeling noise sometimes, during the last 6 months of my ownership. The problem was something with the clutch or gearbox I think...