2008 Chev Malibu LT-brkes pulsating like warped rotor. Felt at pedal not in the steering--figured it was the rear as I had new brakes from dealer a year ago. Replaced rotors and pads---pads worn to wear point. Brakes work great, no pulsating except now above 45 mph. Step on firmly and it goes away. At a Loss
SOURCE: 2004 Malibu (new style) repeat brake failure
the desind is **** they should put drum in the back the problem with not driving enought the part get rusty the caliper bushing get hard and get stuck pressure on the brake stay on a bit the metal of the rear rotor get fatique it start to rust and when the car stay there not running the rust it the rotor out the worst thing is there nothing you can do about it maybe 1 thing apply the hand brake daily what it does the brake caliper bushing move more by moving there less rust that accumulate on them they stay lub longer hope it FIXYA our problem thank you
PIERRE
SOURCE: pulsation in brake pedal and rear end hops during braking
What happens is if you have a bad front wheel bearing when you brake that wheel will turn in or out,when this happens it throws the four wheel alignment out and since this is a solid rear axle,it's forcing it to flex on the suspension,wich could cause the rear tires to bite on the outside edge of one tire and the inside edge of the other,thats one possible the other would be that the rear brakes are are not slowing the wheels evenly causing the same issue.I saw this problem with a bad front wheel bearing on a Nissan Pathfinder but not as pronouced due to the independent rear suspension. Check the front wheel bearings,which of course will mean getting the calipers off the rotors,and then check for any movement in the rotor,if there is check the hub nut,if it's loose tighten it and check for play in the rotor if there is still play that's going to be caused by a bad bearing.You can check the braking in the rear with a simple spring scale(like the ones used for fishing),with the wheels removed have someone apply enough pedal pressure to just engage the brakes but still allow movement attach the scale hook to a wheel stud and pull until it starts to move and note how many pounds of pressure it takes to move the hub.If it's uneven chech your adjusters and even them if needed and then retest,if still uneven you'll need to bleed them again.As far as the dark black substance in the fluid I would say you may gotten a contaminent in the fluid.Brake fluid gets kind of a rusty reddish residue when it breaks down.If I missed anything or you need clarification don't hesitate to ask I'm home all day.Hope this helps solve your problem.
SOURCE: 2008 chevrolet malibu brake problem
Check for clearance between the rotor and the caliper,and caliper to the rim.Make sure one ,or more of the brake pads where not accidently put on backwards,with the metal on the rotor,it happens sometimes.
Testimonial: "turned pout to be warped rotors purchased from re so firestone says. replaced rotors. thank you"
SOURCE: 2002 malibu pulsates braking and driving slowly without brakes
sounds like you need to change the rotors and calipers
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