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Discussion Starter · #1 ·
I've read a lot about the rotor problems with the JGC. However, most complaints seem to be with braking at high speeds. My brakes pulse at low speed....e.g. when slowing down for a stop light/sign. Of course, dealer cannot replicate the problem. I have the chrylser regional rep. coming to check out the vehicle for differential problems *(since p/c on 5/01) and wondered if anyone could enlighten me on the rotor situation. I'd might as well hit them with everything at once. Thanks for any input. Mona
 

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The pulsating while slowing down, even for slowing for a light is most likely the rotors are warped. What year grand do you have? I would tell the dealership to look at the rotors and brake pads. Usually if you have bad rotors your pads will be bad too.
 

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Discussion Starter · #3 ·
I have a 2001 Grand Cher.Limited. I was hoping the rotor problem had been taken care of by now? Mona
 

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I wish. I finally gave up on DC to come up with rotors that didnt warp when ever you looked at them side ways. I was taking to a service tech at a dealership and he said they are still have a big problem with them. For some reason they cant get them right. I finally put some stillens on and so far they are great.

Steve
 

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HI Mona...I think skippy has it down right. My understanding is Jeeps use a cheap composit metal for thier rotors. If you pay $50,000 for a Toyota Landcruiser you won't have this problem. I didn't have The extra $20,000. I think part of the problem is how the brakes are applied and released. On a long hard stop the rotors get very hot..If you keep the brake pads applied after the stop the rotor will cooldown except where the pads are there by causing a warp...After a very hard stop I take my foot off the brake and use the hand brake to hold the car....So far ..no warps....Good luck.......Don S..
 

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check out http://www.motor.com the go to motor magazine, articles, back issues, March 2001, service slant and scroll down to find this......" Jeep
Brake pedal pulsation. Jeep says that pedal pulsation on 1997-98 Grand Cherokees and 1997-99 Wranglers and Cherokees could be caused by the OE brake pads. This condition most often occurs in warm climate, high-humidity areas. What happens is the material from the brake pads transfers to the rotors, causing enough surface friction variation or uneven rotor wear to induce the rough feel. Often the rotors will appear discolored or darker in areas. New pads (Part No. 04778058AB) have been released that should correct this condition. Note: The new pad material can induce minor brake noise, such as squeal and creep groan. Make your customer aware of this before swapping in the new pads. "

I cant remember what year yours was but thought you might find this interesting. FYI Motor Mag is an industry trade publication
 

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Coming from the mouths of Jeep mechanics at my local dealership "the rotors and pads that DC uses are #2" I would not even bother replacing with OE brake parts. This is for the WJ's, it could be a different story for the ZJ's.

Steve
 

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I agree!!!! Use Wagner lifetime mx series pads and highest quality rotors and be done with it. That is all that I used to use at my shop. I have easily done couple thousand brake jobs in the last 5 years and only had a 4 vehicles that I can recall having a problem after. 2 1995 ford escorts owned by the same customer and my old 97 dakota, and my wifes 98 durango. The problem was that they squeal although they worked out of it eventually.
 

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Hi mona,I have a similar situation on my '93 Grand,pulsing brake pedal ONLY at very low speed; my feeling is the ABS read the low speed as a blocking of one or more wheel, sometimes, when driving very slow as queue, if I left my foot on brake pedal, the ABS activate the brakes by it's own. If you have the same problem, try to check the ABS systems. Sorry for my bad language, I'm from Italy :))
 

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Hi Mona,

As I write this reply, I am in the middle of fighting it out with the folks at Jeep. I too have a history of warped rotors on my 99 JGC. In the 35,000 miles I have put on this truck, I have had the rotors replaced 7 times! Now I am out of warranty and I am claiming this problem has been an on going one which was never recified. My warranty service reciepts show that these rotors have warped on average every 5,000 miles!
Rule number one: Make it absolutley clear to the service manager NOT TO RESURFACE THE ROTORS! This is the cheap way out and only makes the problem come back sooner since the rotor is even thiner than it was before.
When I complained to DC after the third set of rotors warped, they had the dealer put in after market rotors but I cant recal what brand. Those warped as well. My only hope now is to have them agree that this is a preexisting condition and to pay for high performance rotors (Stillen?) and just be done with it.

Good luck.

Mike.
 
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