mtl911sc

When braking moderately hard at highway speeds I am getting a very noticeable shudder/rumble when applying the pedal, but no shake at the steering wheel (already changed the front rotors a little while back).

I've also noticed a slight chirping noise from the rear at low speed when the brakes aren't applied, and the braking seems quite uneven & grabby when coming to a stop from even very low speed.

Could this be a warped rear rotor (they've been turned before), or a parking brake in need of adjustment - or both?

jyoteen

Pad deposition possibly.

http://www.stoptech.com/tech_info/wp_padremoval.shtml

redridge

+1, re-bed your brakes.

mtl911sc

I've read that re-bedding the rears is difficult since it requires the fronts to get to the point of lock-up to generate the required friction in back. Or are you referring to re-bedding the fronts? I'd think any amount of pad deposition in front would create some steering wheel shake.

And do I really need Hawk Blues to do this or will my existing (stock) pads be up to it? Buying a set of Hawks isn't much less expensive than simply getting new rear rotors from Suncoast.

Thanks for the input.

dresler

go really fast backwards and hit the brakes.

just kidding... sort of.

TrackDays247.com

Warped rotors on a modern Porsche = virtually non-existent.

Hawk Blues are very, very corrosive. Even the Hawk rep will readily tell you (did me) that -

mtl911sc

Even if they've been resurfaced? I think I'll have to try a set of the Blues for this job, the shake & rumble is really annoying.