Your throwout bearing is going bad.
If it is a standard transmission S10 maybe they are talking about the "throwout bearing" which is part of the clutch operation that can go bad.
this sounds like a bad torque converter (automatic) or a bad throwout bearing (manual)
Possibly bad throwout bearing
It will squeal when you are not using the clutch
No, the throw out bearing in a clutch is needed to keep an disengaged clutch spinning. you can drive a car with a bad throwout bearing if you don't use the clutch By "floating the gears". You must disconnect or bypass the start safety switch (this is when you need to have the clutch pedal to the floor to start the moter) so that you can start the car in gear if you come to a complete stop.
Your input shaft bearing is going bad, it will get worse if not replaced
From your description it sounds like it MIGHT be a bad throwout bearing.
They are loose or worn out. Also can be a pulley with a bad bearing.
Input shaft bearing is probably bad, especially if it is noisy in every gear but 4th
The throwout bearing is bad. the throwout attaches to the clutch fork and presses into the clutch pressure plate when clutch is depressed. You will need to replace this and complete clutch assembly. Make sure that you have the flywheel turned while clutch is removed.
possibly a bad throwout bearing and check your clutch disc for wear.