CT4-V Brake Vibration

[Emu1342]

They replaced the pads and rotors and the pads allegedly had an updated part number. I don’t have the car anymore so I’m not sure if it’s still a problem.

Thanks for responding. In your time left with the vehicle, i assume then, it didnt come back. Im just asking since my pads/rotors were recently replaced and i read somewhere else there may be an issue with how the wheel was milled causing this issue.

 

[seattlecubes]

I didn’t notice it. I was never a hard driver so I assumed that was part of the problem because it seems like cars that are tracked don’t have the issue.

 

[piranha971]

I didn’t notice it. I was never a hard driver so I assumed that was part of the problem because it seems like cars that are tracked don’t have the issue.

This appears to be the problem based on my observations over the past 8 years starting with the atsv. Cars that are driven lightly build up material on the rotors and start to feel like they are warped. The dealer then turns them and the problem goes away for a few months. Then it's back and the rotors get replaced for 2k or whatever it is.
I drive relatively hard. I bought my car used with the same symptom. After several weeks of regular driving the problem progressively lesser ed until disappeared completely to never return.

 

[mrsmiller]

Hit the brakes and I get a lot of vibration. 5k miles on CT4-V. Visually and by touch the rotors look good, no grooves etc.
I'm thinking I have bad pads.
Unique or known issue? I'll probably schedule an Appointment with the dealer soon.

So... that CT4-V Blackwing brake vibration: my two-month old car, broken in per the owner's manual, not red-lined, never into the ABS, not tracked (yet...) and with 2,000 highway miles, has that wicked vibration. Dealer of course wants to turn the rotors, but there's no way I have "warped" anything that stout! (Ever. My average for replacing brake pads on any vehicle, since 1976, has been around 80,000 miles.) So... is it that I didn't bed the brakes properly? Or is it, really, not the brakes? I'd swear that the frequency of the vibration stays pretty much constant, regardless of vehicle speed at brake application. And it's felt more in the seat and the steering wheel than the pedal. This is one case where the car's computer "telling" on me will be to my advantage at the dealer; it knows it's never been driven or braked that hard. (Yet...)

 

[dtuna42]

I was told these cannot be turned / cut, just replacement only. I'm on 3rd set in 40k miles over 3 years. The 1st set replaced under warranty because they were wiped just from the test drives at the dealer. I replaced them again at 30k, and at 38k they are already warping again!

 

[markitzero]

I had my rotors replaced (third set for this car, but first under my ownership) in the fall and have noticed the brake vibration comes and go. If I use brake cleaner and scrub the rotors, and then do some hard braking, it dramatically improves. I really believe it's a behavior of the brake pads. When I go out and actually drive the car hard and burn up the brakes (I get on a back road and brake from 60-25 a few times) it improves. For me it's most noticeable vibration around 35 mph when "trail" braking. At any speed if I hit the brakes hard they immediately bite and I lose vibration. I've changed the way I brake to a bit more "harder pulse" style and it seems to help. It's definitely annoying and I'd like to try some of the other lower dust pads to see if it helps.

If anybody has any experience with those pads I'd love info.

 

[AC2024]

I had my rotors replaced (third set for this car, but first under my ownership) in the fall and have noticed the brake vibration comes and go. If I use brake cleaner and scrub the rotors, and then do some hard braking, it dramatically improves. I really believe it's a behavior of the brake pads. When I go out and actually drive the car hard and burn up the brakes (I get on a back road and brake from 60-25 a few times) it improves. For me it's most noticeable vibration around 35 mph when "trail" braking. At any speed if I hit the brakes hard they immediately bite and I lose vibration. I've changed the way I brake to a bit more "harder pulse" style and it seems to help. It's definitely annoying and I'd like to try some of the other lower dust pads to see if it helps.

If anybody has any experience with those pads I'd love info.

I have had this issue since 10k miles (25k now). I bought the car new. Some folks on here have said that it’s due to not braking hard enough. That’s certainly not me as I definitely generally brake a bit harder than one probably should on the street and the car does see some lapping time.

I’ve tried replacing the front stock pads with SR11s, then the rotors with girodiscs then the pads again with ds2500s and I always found that the issue will come back within a few hundred miles. I am now back on a new set of stock pads and rotors so that I can make a warranty claim in the next time it happens. It has been very, very frustrating. At this point, I have suspected that there is perhaps something with the brake by wire system that is causing the pads to lay down and not uniform deposit layer since I cannot explain why it would continue to happen with three different compounds and two different rotor types. If anyone could help me solve this problem, they’ll be my best friend as the judder is super annoying. My latest theory is that perhaps it’s coming from the rears since I’ve done all this work on them on the front and I don’t feel anything really in the steering wheel. It’s more in the chassis. However, it definitely does get 90% better each time I change the front pads or rotors only to come back within 500-1000 which points to something happening with the front. I have similar experience that you do that the vibration does not occur during hard braking, but most of the cars time is as a street car so that’s not a solution.