T5 Gear Whine
Reply #1 –
No, it only has load on it when the clutch is pushed (i think..?).
Might be a worn input shaft bearing. It's on the input shaft, behind the round cover that the input protrudes through. If you take the trans out to replace it (which is easy, the hard part is removing the trans lol) also slap on a steel bearing retainer. that will also give a better feel to shifts and last longer than the stock aluminum piece.
They're going to make a little noise, but it shouldn't be audible at highway speeds.
Also, you don't have your clutch cable too tight or not tight enough? Reverse is unsynchronized, expect some slight issues with putting the shifter into reverse unless you first shift into 5th. That slows down the spinning inside enough to overcome the non-syncing gears. Since it pops out of reverse, my guess is that the clutch cable isn't quite adjusted properly.