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Old 10-29-2014, 10:06 AM
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Warped discs

After installing frozen rotors all the way around on my 2011 grand cherokee overland 5.7 with tow package I am very disappointed to see that after about 2 and a half months my rotors are now once again warped not to mention the ungodly awful squeal that has been there since install. I'm trying to find a set of brembo sport drilled discs (front and rear) to replace the frozens that I purchased for almost $800 (waste of money) but I can't seem to find any for my vehicle, any suggestions???

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Old 10-29-2014, 10:34 AM
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Re: Warped discs

Wow mine are warped too. 36,000 miles. Was going to replace them with OEM but thinking I may not. Curious on your responses. I have a 2012 Overland. I wonder if they make a Brembo rotor for the Overland...
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Old 10-29-2014, 10:41 AM
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Re: Warped discs

The rotors are probably not warped. Uneven deposits of brake pad material on the rotors will cause brake pedal pulsation. Do a series of five maximum braking runs from 60mph - 5mph. When you are done, cruise around and let everything cool off. Do not sit at a stop with the brake pedal engaged. If you must stop, put it in park instead. This will keep more pad deposits from sticking to the rotors. You will probably notice a much smoother brake pedal after this. True warping of rotors is uncommon, uneven pad deposits are very common. Most shops will not tell you this because they make a lot of money resurfacing rotors.

I live at the top of an 800' high hill. I have had more than one vehicle that would load up the rotors with pad deposits after a long descent with lots of braking. This technique worked every time. Doesn't seem to be a problem with my SRT8, but I have had a minivan and SUV that would do this often.
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Old 10-29-2014, 10:44 AM
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Re: Warped discs

Thanks for the input I'll give that a try
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Old 10-29-2014, 10:45 AM
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Re: Warped discs

Watch your lug nut torque. Mine came from the factory way over torqued. Tire shops are famous for over and uneven torquing with impact tools.
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Old 10-29-2014, 10:47 AM
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Re: Warped discs

Wouldn't you be able to see the brake pad material on the rotor? I don't really feel it in the brake pedal. I feel it in the seat of my pants and only after the brakes have heated up. It's kinda like a wobble,shaking feeling not a pulsate,like on and off.
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Old 10-29-2014, 11:53 AM
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Re: Warped discs

I would also like to add that my steering wheel wobbles back and forth when braking around 70mph down to about 40mph, which is why my first thought was warped rotors, could this still be due to pad deposits? I do drive a little on the aggressive side (lead foot) not so much in and out of traffic but I do tend to rail turns at speed and sometimes moderate to hard braking is required. I live in north Jersey and there are a LOT of winding/hilly roads that I travel on (I live more or less on top of a ski resort)
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Old 10-29-2014, 12:02 PM
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Re: Warped discs

Quote:
Originally Posted by JDB636 View Post
I would also like to add that my steering wheel wobbles back and forth when braking around 70mph down to about 40mph, which is why my first thought was warped rotors, could this still be due to pad deposits? I do drive a little on the aggressive side (lead foot) not so much in and out of traffic but I do tend to rail turns at speed and sometimes moderate to hard braking is required. I live in north Jersey and there are a LOT of winding/hilly roads that I travel on (I live more or less on top of a ski resort)
Yes what he said. I was in the mountains at Killington ski resort and there was a lot of long hills. My Jeep shook like crazy... I think these jeeps are under braked... I had a 1997 Limited and it did the same thing. Wish I could afford the Brembos. If they made them for the Grands other than the SRT's they would sell a ton...
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Old 10-30-2014, 09:44 AM
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Re: Warped discs

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Originally Posted by JDB636 View Post
I would also like to add that my steering wheel wobbles back and forth when braking around 70mph down to about 40mph, which is why my first thought was warped rotors, could this still be due to pad deposits? I do drive a little on the aggressive side (lead foot) not so much in and out of traffic but I do tend to rail turns at speed and sometimes moderate to hard braking is required. I live in north Jersey and there are a LOT of winding/hilly roads that I travel on (I live more or less on top of a ski resort)
Your reported symptoms are right on for this.

Also, you will not necessarily see the build up on the rotors. Your driving route is the perfect storm for causing this problem. Those rotors get real hot on the descent. At the first stoplight you come to, the pad will leave a thin deposit stuck to the rotor if the brake is kept on. Just put it in park at a stoplight.
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