slotted/drilled rotors

[qukon 95]

i have slotted/drill rotors on the yuk for over a 1yr and
i have a rumble sound when i put the brakes on to slow
down going over 40 mpg . i have new ceramic pads,new calibars and i changed the direction of slots (switched the
rotors) still same rumble. does anybody have this problem

with there slots?

 

[SunlitComet]

nope but i also don't touch ceramic pads either.

 

[Stresst]

i have slotted/drill rotors on the yuk for over a 1yr and
i have a rumble sound when i put the brakes on to slow
down going over 40 mpg . i have new ceramic pads,new calibars and i changed the direction of slots (switched the
rotors) still same rumble. does anybody have this problem

with there slots?

As far as I know you cannot switch the position of the rotors, they are made to let air in.....

Not sure of the rumble you are referring to but the rotors wore to a particular way to match the old pads. There are break in instructions online when using new pads with old rotors. Can I ask why you used ceramic? Drilled and slotted are pretty much all out race rotors but ceramic pads are made for the total opposite! jmho

 

[noJeepshere]

I got the slotted and drilled rotors for mine, but went with the severe duty non-metallic pads (not ceramic) and somewhat have that noise you're talking about. I don't know what's causing it.

 

[domin8]

I have slotted and drilled rotors on all 4 wheels of my truck and installed new ceramic pads at the same time. I've been running that setup for over a year and have never had a problem. I drive my truck everywhere and have put over 25k miles on the setup in almost 18 months. This includes a 6k trip with a fully loaded truck while towing a car on a 2k# trailer over the Appalachians 5 weeks ago.

As one poster said, slotted and drilled rotors are directional. They are made this way to help them cool, which is what the drilled part is all about. As for ceramic pads, their main purpose is to stay cooler longer and to cool faster, which they do marvelously. I have never seen adverse affects of using ceramic over other material. The downside of ceramic pads is the dust the cheap brands generate. A good set of ceramic pads, such as Wagner Thermoquiets are not only quiet, but create low to no dust while providing superior braking.

As for the cause of the noise, did you replace the shims that go between the pads and the caliper?

 

[Stresst]

I have slotted and drilled rotors on all 4 wheels of my truck and installed new ceramic pads at the same time. I've been running that setup for over a year and have never had a problem. I drive my truck everywhere and have put over 25k miles on the setup in almost 18 months. This includes a 6k trip with a fully loaded truck while towing a car on a 2k# trailer over the Appalachians 5 weeks ago.

As one poster said, slotted and drilled rotors are directional. They are made this way to help them cool, which is what the drilled part is all about. As for ceramic pads, their main purpose is to stay cooler longer and to cool faster, which they do marvelously. I have never seen adverse affects of using ceramic over other material. The downside of ceramic pads is the dust the cheap brands generate. A good set of ceramic pads, such as Wagner Thermoquiets are not only quiet, but create low to no dust while providing superior braking.

As for the cause of the noise, did you replace the shims that go between the pads and the caliper?

In your case you replaced the pads at the same time.....but the OP if I understood correctly replaced the pads on 1 year old rotors. While I know many people that only change pads I NEVER do unless the I have the rotors cut.....

The old pads and current rotors matted and created a flush surface, now the rotors have some type of wear pattern but the pads are new I am almost certain the pads are not flush on rotors (when applying the brakes)

 

[Donnie Yukonie]

did you "turn" your rotors with the new pads? i dont know if this can even be done with drilled and slotted rotors but i would imagine you can , how much of them is left? are they warped possibly?

 

[ScottyBoy]

I thought this "rumble " noise was normal with drilled and slotted rotors. I put some on my wife's car a few years ago and heard a rumble from day one, but only during a HARD deceleration from 50+ MPH.
I put some on my Suburban and they sound the same way, and only on a hard fast stop.

 

[Phone Man]

I have power slot drilled rotors and Hawk pads. I switched to Hawk pads bc of noise from the power slot brand. So far Hawks are the only ones i'd use again.

 

[retorq]

I ended up warping my drilled rotors pretty quickly ... under a year and a half. It vibrated and "rumbled" right before I swapped them. Check your wheel bearings while you are in there ...