shajbot

iTrader: (3)

About a month ago I replaced the rear rotors on my 93 LS because of a strong vibration that could be felt in the brake pedal and the seat that was going on for awhile after I picked up the car. I also replaced brake pads all around because they were almost worn. Right after that the vibration subsided for a couple of day but returned again, only this time, it's only a slight vibration at braking now. I'm thinking if the rotors are brand-new it should be vibration free. So maybe it's not the rotor but something else. I noticed when I removed the old rotors to put in the the new ones, the wheel hubs looks very rusted at the surface. Could this rust cause the rotor to sit unevenly on the hub causing the wrapped rotor vibration when braking? And yes I searched. Thank you in advance for any input.

LiCelsior

iTrader: (32)

hmm did u break them in properly?

shajbot

iTrader: (3)

I think I did...hard braking 60-5, 40-5,30-5 about a minutes or two in between runs for a couple of time.

LiCelsior

iTrader: (32)

hmm, maybe one of the calipers is seized?

shajbot

iTrader: (3)

Pretty sure the calipers were moving with the slider pins when I had the calipers apart.

RA40

iTrader: (6)

Clean anyy surface rust off the hub that the rotor may contact as well as your wheels. Make sure the lugs are all torqued to the same spec.

MrFuel

iTrader: (3)

Check your strut bushings. Mine did the same only on braking and it was my bushings were bad.

AerialAce

Why only the rear when the front takes about 70-80% of the brake abuse? Theirs a good chance the fronts are warped, its extremely common on 1st gens.

billydpowe

iTrader: (1)

I have agree with MrFuel, check your strut bushings.