You know, I had the same problem in 3rd and 4th gear. It would make this loud squealing noise like two gears rubbing together. The more strain I put on the drivetrain/transmission, the louder it got. Turns out it was a failed U-joint, $18.40 fix. Pull your drive shaft and move the U-joints. Although they look fine and unbroken from the first examination, they could be stiff. Mine was stiff. I could have sworn it was the transmission too. If you pull your drive shaft, don't forget to mark it so you can install it the same way.

 

ye amine does the same thing in 5th and im getting ready to do the u joints.

 

Thanks. I will take a look at them.