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If you have had the Brake Pads / Disc Pads changed, and they have not useed ORIGINAL PADS , the shudder will / might happen. The other cause may be that the pads are very worn down, that will make ir shudder.
Brake pedal pulsing is very common in commodores this is well know as brake shudder .
more noticeable at speeds above 60klm.
the hot the brakes get the more noticeable.
To fix this problem you will need to replace your disc rotors and clean the hub surface and face area .
when fitting the new rotors you will need to check the run out it has to be under 0.5mm for front and 0.08mm rear .
If the problem is due to warped brake discs, you will typically feel a mild pulsing in the peddle when braking firmly. Also, when you are experiencing this shudder, taking your foot off the brake (when safe to do so) should cause it to stop. If that is not the case, I would consider again the transmission. I am on my second Caravan, so I speak from experience. The Caravan transmission should have the fluid changed every 30,000 miles to keep it in top performance, especially if you are carrying any heavy loads or pulling a trailer. When you are slowing to a stop, the transmission must downshift through each of the gears. If it stays in the higher gears at too slow a speed, you will feel a shudder. Sometimes this can be corrected by changing the transmission fluid. Be sure to use the proper Chrysler fluid for your transmission. Typically it is the highest (overdrive) gear that causes the shudder. You can determine this by moving the gear selector from "D" to "3" when you are experiencing the shudder. Other possibilities are alignment, worn stabilizer bar bushings, worn ball joints, and out-of-round tires. Most of these also involve some accompanying noises though. Good Luck.
When you replaced your brake pads did you also replace your rotors??? If you haven't replaced them, I can almost guarantee your rotors are warped and need replacing. Anytime you replace brake pads, replace the rotors as well. That's what i reccomend!
Inspect the brake rotors for grooving and score marks and also look to see if there are any heat cracks, if there is grooving or very little brake pad material remaining replace the brake pads and also two new rotors, it is also possible that it is just a frozen or stuck brake caliper, this would be indicated by an uneven rotor one that has more metal or meat on one side that the other also uneven brake pads indicates an uneven brake caliper application
when it starts to shutter get the car up on a lift and spin the wheels and look and see if there is a wheel bubble.
if the brakes were done recently a binding brake pad can cause some of that.
hope this helps
I just changed the brake pads and rotors on my father's 2001 Trooper that he recently purchased because they were shaking just like your were. He bought it from a mechanic shop and they had put new pads on it but it needed new rotors as well. If there is noticable groving on the rotors and new pads are installed it can create shaking, sometimes severe, when the brakes are applied. It sounds like this is what has happened with your vehicle as well. That being said, I don't consider it a huge safety issue to drive it until you get it fixed, just know that your braking will not be optimal and that it will take you longer to stop than if the brakes were working properly. All that being said, get them fixed ASAP so you don't have to worry about it. Who wants to mess with safety right? Good luck, hope this helps!
It seems now a days that everyone loves to turn rotors, the only reason to turn a rotor is if it is running out, what this means is that it is moving back and forth and not in a straight line. What a brake tec is suppose to do is place a dial caliper on the rotor and spin it and see if it is running out,if it is then it must be turned,as long as the rotor is not under the mfg min width. Any vibration,pulsing,shudder, would tell me that it needs to be turned, just wanted to explain the reason behind it. Any other questions please post back as everyone is more than happy to help.