Hey everyone, my car has been shaking when I brake I higher speeds (60-100). I’ve done a couple attempts to try to fix it from changing the brake pads, resurfacing oem rotors, tires, balance, alignment etc. The issue hasn’t gone away and I’m not sure what could be the issue? Any other things to inspect for troubleshooting would be appreciated. I honestly wouldn’t mind just buying slotted or drilled rotors at this point (I live in florida and rain is constant and I heard drilled are good for wet climates) to see if it would fix my issue.

 

Was the run-out checked on the rotors after resurfacing. I had the OEM BBK rotors on my G, and they were not that good in my experience even for being made in Japan! If there is run-out on the rotor, check the wheel bearing hubs for run-out.

 

I’m not sure if they were checked for run out but I’m changing my brake pads tomorrow and I’m gonna resurface them one more time but I’ll specify to keep an eye on run out.

How can you check it on the hub? I’m thinking of just buying new rotors as I’ve seen that the OEM rotors aren’t the best. Either autozone or advanced auto parts or should I stray away from them?

 

Sounds good.

They would use a dial indicator to check the rotor run-out. Then if it is found the rotor has run-out, they should certainly check the wheel hubs. They will do the same thing and use a dial indicator on the hub flange. While the wheel studs might get in the way, the shop still should have no issue checking this. The wheel hubs and rotors both would have a run-out spec. If it is out of spec, it could be showing up at higher speeds and causing the shaking. This is simply just an educated guess on my part and it could be another issue, but I think this would be a good way to at least eliminate the rotors and wheel hubs as a variable.

As for the rotors it is entirely up to you. I would try to avoid chain store rotors as most are not great or down right unsafe. I currently use Hawk Talon rotors which are made in the US on my G. Before the BBK I used EBC USR rotors which were excellent. Plenty of other reputable brands too. You can get Hawk Talon rotors from Tire Rack for very good prices.

The pads I use on the G dust like crazy and the dusting went through the roof when I added the drilled and slotted rotors from Hawk, so that is something to keep in mind. My front wheels turn gray after a week. I got the drilled and slotted rotors to help expel water from the brakes as the brakes would perform very poorly in heavy rain.

 

mission accomplished. Resurfaced rotors and got new brake pads, no luck. Felt something off on the wheel bearing and replaced both to eventually fixing the issue I’ve been dreading for awhile. Odd enough I had this issue on my previous g37 but it was more on the noise end rather than mechanically.

 

So it was the wheel bearings? That is great news you got this resolved!

Wheel bearings can cause all sorts of issues, they don't need to hum or make noises for them to be bad.

 

yeah it was the wheel bearings. I did check for play around the wheel with the tire on and it was firm but when I turned it without the tire I noticed that the passenger bearing was showing some resistance or it was off. Both decided to change both and don’t regret it. The cars at 89k and decided to keep it for the long haul if I managed to fix the issue since the rest of the car is mint

 

Good to know, I am sure it might help others.

 

Wheels bearings are a common culprit of issues on our cars so that doesn't surprise me.

 

agreed, had the same issue on my previous g37. Just for point of data, started around ~84k mile and changed rotors at 89k miles