Start by checking for: bad trany, bad driveshaft, bad engine/trany mounts
It could grind, squeal, squeak, or make no noise at all.
When a shift solenoid goes bad the solenoid doesn't make any noise.
It will make noise underneath the car especially when you turn the wheel
Yes, the differential can make a grinding sound.
Bike gears make a clicking sound while shifting because the teeth of the gears are engaging and disengaging as they move to different positions, creating a clicking noise.
Check the serpentine belt. If it's loose it will make a terrible noise.
Answerif you use synthetic oil you will have a little more noise than standard trans plus fluid.A loose belt will cause a sqeaking noise especially when shifting gears
Check the U-Joints in the drive lines. More times than not it is these that are really bad.
When the mount is broke off the engine you will hear a loud clicking sound from then engine being unstable and shifting around. Listen close enough and you can hear it shifting when the vehicle jerks.
Check the belt - make sure it is on the pulleys and not broken
service standard transmission
Mazda Proteges are known for their sway bar links to go bad around 80,000. They make a terrible clunking noise, but if intact (in most cases) the car is still safe to drive.