DODGE CARAVAN WHEEL PROBLEM
2006 Dodge Caravan • 101,500 miles
Replaced new front rotors and pads + new rear shoes, hardware, spring kit, drums and wheel cylinders. there is pulsation at when applying brakes at 60 mph and above. what else could be the problem? Thanks.
April 3, 2013.
April 3, 2013.
If you don't see any sideways wobble in the wheels, remove them, reinstall three lug nuts, then watch the rotors as they spin. Mechanics will use a dial indicator to measure the lateral runout of each rotor, and a micrometer to measure for thickness variation. Thickness variation causes the brake pedal to pulse up and down. Lateral runout forces the caliper to slide back and forth on the mounts and that tugs on the steering linkage. It will be felt in the steering wheel. If you can feel the vibration in the steering wheel the runout is usually bad enough that you can see the caliper moving without using a dial indicator.
Warped rotors are also a common result of failure to use a click-type torque wrench on the lug nuts. The uneven clamping forces causes the rotors to warp from the uneven stress and heating and cooling cycles. The clue is the pulsation shows up weeks after the brake service was done. Warpage from rough handling or debris between the rotor and hub shows up right away.
The rotors have been replaced twice from different vendors.all wheels are torqued at 100 foot lbs. when asked the dealer. Rust on hub was cleaned with sanding paper. New Rotors were cleaned with break clean from Napa. Pulsation showed up right away ONLY when braking at 60 mph or higher not at lower speed. What else there could be?.....
Apr 3, 2013.
Apr 3, 2013.
The rear drums would have been machined too. While they will not be egg-shaped, if they were not mounted squarely on the brake lathe the friction surface will wobble and make the shoes turn and slide back and forth. You can identify that by pulling the parking brake release lever, then pushing the parking brake pedal lightly. That operates just the rear shoes. If you feel the pulsing tugging sensation look at the rear drums.
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