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Old 02-19-2015, 03:40 PM   #1
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Brake issue?

On our last trip, an issue developed that could be a very dangerous situation. At a slow speed something happens in the rear of the coaches under carriage that really SHAKES the motor home. It acts like the rear brakes are locking up and unlocking very rapidly. It is extremely severe and cycled about 4 or t times before I could stop. It has only happened 3 times and at a slow speed (less than 15 mph). Naturally, I stopped and examined the undercarriage and could not find anything that appears to be wrong. I would hate to be traveling at highway speeds and have this occur. If something broke it could be a real safety issue, not only to us but also to any other vehicle. Does anyone have any suggestions regarding this issue? I WAS SCARED --Tom--
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Old 02-19-2015, 04:11 PM   #2
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I wonder if it could be the ABS module? Does it feel like the ABS is being applied?
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Old 02-19-2015, 04:44 PM   #3
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Hello Tom, Just another place to look, check the U-Joints they could possibly give you that type of vibration.
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Old 02-19-2015, 07:13 PM   #4
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Quote:
Originally Posted by Dave Fernandez View Post
Hello Tom, Just another place to look, check the U-Joints they could possibly give you that type of vibration.
x2 ^
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Old 02-19-2015, 09:33 PM   #5
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If you feel it is the brakes possibly a bolt on the caliper came loose. I had that happen on a ford explore years ago.
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Old 02-20-2015, 09:26 AM   #6
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Is your ABS light on? It should come on and go off when you start MH. If it stays on then you can pull the diagnostic code. A leaking brake caliper can cause a wheel to lock up. Any fluid drips by the rear wheels? Good luck.
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Old 02-20-2015, 01:55 PM   #7
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A leak in an Axle seal will also cause the brakes to drag and lock up. If one seal on one of the 4 Caliber pistons is hanging up it will also cause the brakes to drag and over heat.
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