90NA300ZX

only at speeds above 50mph or so...


yes, i got new rotors in front...and all the pads still have a good chunk of meat left on them...what else could be causing this?

it's not fun feeling the steering wheel shake like this when i'm trying to slow down in a hurry...to say the least.

NismoPick

The steering wheel shakes when braking... classic sign that the rotors need to be machined. Where'd you get the rotors?

EDIT... also, have you balanced your tires lately?

z-hag

..............word.................

Fast240Z

when you replaced your rotors, did you replace the pads as well? I hear it's not good to replace rotors w/o new pads (I don't know from personal experience, pads are something I replace when I do any work where the tire comes off, since they are lifetime pads and all).

CanyonCarver

Do not use old pads with new rotors.... or any other rotor for that matter. Pads do not wear evenly. They are no longer parallel after some use. If you can imagine, the outside of the rotor turns faster than the inside (closer to the wheel bearings), so the outsides wear faster. It's just as bad as installing new pads with old, un-turned, rotors.

And then, even with new pads and rotors, you might experience some shake. The fsm specifies a maximum of .005" runout on the rotors. Most people can't easily check this. So, you might just try and determine which rotor is running out, or is out of balance a little, and rotate it one hole on the lugs. This has been known to improve things. If rotating the rotor one hole doesn't help, rotate it another hole.

If you have new pads and rotors and you can't get rid of the vibration, there's a good chance that you have a bad rotor.

ZKruser94

If the vibration is in te steering wheel then its fron rotors if it feels more like in the seat thn its rear rotors $.02

emo236

have you had your tires balanced lately? If it vibrates, it could just be noticeable during high speeds and braking.

91zxtt

It's likey your tension rod bushings.....surprised nobody else has suggested this.

CanyonCarver

Except that it appears that his problem started after installing new rotors and old pads.

91zxtt

I didn't read it that way. I thought he already changed the pads and rotors in an effort to fix the problem.

emo236

91 has a point. Also I would check your tie rod ends (inner and outer, back and front) to see if they are loose.