Ritch Posted March 29, 2006 Share Posted March 29, 2006 I just put a 3in lift on a 83 Brat, with six lug 14in rims and 26in tires. I put new rotors and had the drums turned, with all new pads. I have not had it aligned yet, but it drives staight and the steering wheel does not shake. But when I apply the brakes the pedal pulsates and the steering wheel shakes from side to side. I'm sure it it something that I messed up, but I not sure what. Any Ideas? I also replaced the front bearings before I installed the lift. Quote Link to comment Share on other sites More sharing options...
Numbchux Posted March 29, 2006 Share Posted March 29, 2006 Sounds like textbook warped rotor.....where these 'new' rotors really new? or just different? could also be bad CV, but that wouldn't cause almost any pedal pulsing. Quote Link to comment Share on other sites More sharing options...
subiemech85 Posted March 29, 2006 Share Posted March 29, 2006 warped rotors Quote Link to comment Share on other sites More sharing options...
idosubaru Posted March 29, 2006 Share Posted March 29, 2006 i had a warped new rotor, right out of the box last year. same thing you're describing. what i did was jack the front of the car up. i turned both wheels by hand. i could barely feel the passengers side catch at one point during the revolution of the wheel. it was very light. i was surprised how hard it was to tell considering how terrible it pulsated when braking. i guess at speed with the calipers clamped makes all the difference. anyway, i took about 5 times going back and forth between passenger and drivers side to convince myself that the little catch i was feeling while turning the wheel by hand was the bad rotor. took it back and they gave me a new one. unfortunately i got these rotors at a store i don't normally go to and it was in the city. took some convincing as the guy swore i had driven on these or didn't install them properly. he gave me a new one though. Quote Link to comment Share on other sites More sharing options...
Subarian Posted March 29, 2006 Share Posted March 29, 2006 I've had the same quality issues with new rotors recently. You can pull the wheel and use a point on the backing plate as a reference point. It doesn't take a lot of out-of-round to make you feel it when you're braking. Quote Link to comment Share on other sites More sharing options...
Numbchux Posted March 29, 2006 Share Posted March 29, 2006 question: can a warped rotor be turned? or does it have to be replaced.... Quote Link to comment Share on other sites More sharing options...
subiemech85 Posted March 29, 2006 Share Posted March 29, 2006 they can be re-turned, but not machined Quote Link to comment Share on other sites More sharing options...
hooziewhatsit Posted March 29, 2006 Share Posted March 29, 2006 hmm.. I was getting the same shaking a while ago also.... got the rotors turned, did not replace the pads, and the shaking went away... for a while... Now the shaking is back Is this something you have to do at the same time as you replace the pads? I figured if the pads were a bit off, the newly turned rotors should true them up. Quote Link to comment Share on other sites More sharing options...
Ritch Posted March 29, 2006 Author Share Posted March 29, 2006 They are brand new rotors, the reason I bought new was because it did the same thing with the old ones. I have a feeling that the wheels are not to the hub after I modified it to fit the the six lug rims. Quote Link to comment Share on other sites More sharing options...
Qman Posted March 29, 2006 Share Posted March 29, 2006 they can be re-turned, but not machined ? I hope you're just playing on words. A rotor can be machined until it reachs the minimum spec for thickness. The solution for a warped rotor is machining/turning on a brake lathe. Quote Link to comment Share on other sites More sharing options...
beauregaardhooligan Posted March 29, 2006 Share Posted March 29, 2006 I know our company f150 had new rotors put on and within a couple of weeks they started pulsing. They replaced them again, two weeks later, same thing. Then the shop turned the 2nd set of new rotors. Again, the pulse came back in a couple of weeks. Turns out the supplier had a bad batch. 3rd set finally worked. Quote Link to comment Share on other sites More sharing options...
subiemech85 Posted March 30, 2006 Share Posted March 30, 2006 some info: http://www.eradispeed.com/warranty.shtm Quote Link to comment Share on other sites More sharing options...
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