Troubleshooting car problems on noise when shifting
When noise is heard while shifting into two or more gears occur this only indicates problem inside the transmission assembly. Usually this is an indication of problem involving parts that is rotating, with that said the possible problem is the input shaft bearings or the main shaft bearings since this is the only parts that rotates at all times. This is just a possibility, we can only determine the exact cause of the problem if the actual transmission is opened up and inspected.
Possible Cause of Noise When Shifting
Damaged input shaft bearings or main shaft bearings.
How to Fix Noise When Shifting
Bring the car to a reputable car shop that specialized in manual transmission and ask the auto mechanic to inspect the transmission assembly. Probably the mechanic will opened up the transmission to determine the exact cause of the problem. This is a costly repair so be sure to find a shop that does a good job in transmission assembly.