broken motor mount(s)
Are we talking about the front wheels or the rear? Have you checked your wheel bearings?
If you suspect something, get them checked. If you get vibration while applying the brakes, get them checked. If you get grinding noise from the brakes, get them checked.
only thing i know that will make brkes grind, is worn out brakesmaybe have em checked at a different mechanic
Have the wheel bearings checked, as well as the alignment.
leaking grease or cracks Looseness
yes sounds like a wheelbearing get it checked before it tears up your spindle
It could be a few things hub bearings, brakes, ball joints or possibly the CV axle. I would have it checked and then fix the problem at home if it is within your ability.
With each brake job.
leaking grease or cracks Looseness
It might be the clutch but get it checked out
Probably a problem with the transmission "valve body". Have it checked out with a transmission specialist.
Have you checked the pads to make sure they are still ok? my first car made a horrible noise when i used the brakes and it turned out the pads were bald so it was metal on metal. Only other thing i can think off is that the wheel bearings on their last legs?