Manual transmission makes noise when under load going forward. Not in neutral. on 1999 Nissan Altima

It has gotten louder in the last couple of days.

1 answer
Check the transmission for oil or perhaps just change the oil as a precaution. If it makes noise in all gears and not in neutral or the clutch pedal depressed the bearings in the transmission may be bad requiring the transmission to be overhauled.