Hey guys! New to the page as I am seeking some information or help. I have the 6-speed manual elantra and noticed that there is slight high pitched squealing noise while the car is in gear. It seems to be more prominent within the higher gears. What could be the cause of this? I don't beat on my car and I am experienced driving manual trans, so I don't believe it would be anything I have done. Gear fluids, throw out bearing, possibly engine oil levels? Where would you guys suggest I start troubleshooting. Hoping for it to be a simple fix. I also need to verify this after work, but from what I noticed the gears would only produce the squealing when my a/c was on and the car was in gear.