Ill just go ahead an add how to go about fixing it just in case you decide thats the problem. The mounts themselves shouldn’t be bad, its the rubber bushings on the ends of the crossmember, you’ll have to use a torsion bar tool to take the torsion bars out just like you would if you were replacing the keys, so if you do want to add lift keys now would be the time, but once you have the t-bars out, you have to take the crossmember out, some people take the time to clean it up and paint it while its out to prevent further corrosion, then the rubber bushings have to pressed out like bearings and new ones pressed in.