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  #1  
Old 08-13-2013, 04:19 PM
DBacksFan DBacksFan is offline
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Default Bumpy Braking

I recently purchased a new 2013 Ram 1500 Express, crew cab, hemi 6spd 2wd. I've got about 400 miles on it and have just recently noticed something strange with the braking.

Whenever I'm sitting in traffic and scoot the truck up by lightly taking pressure off the brake pedal until the truck starts to move, there is a jerking or bumpy feeling in the truck. It goes away when the pedal is pushed harder or released completely, so basically it only happens when dragging the brakes and inching forward. I don't think the rotors can be warped, because braking from speed is smooth, and when the bumpiness occurs, the truck is moving so slowly that the wheels are barely turning.. Is this normal for these trucks? My initial reaction was that as the engine turns over, it tries to push the truck and creates a bumpy feeling, since the brakes are so lightly applied. I have a feeling that's not what it is though, since I've never experienced this in another vehicle. Has anyone else experienced this in a brand new truck, and any idea what causes it?

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Old 08-13-2013, 04:49 PM
Grimass Grimass is offline
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It sounds like you may have a warped rotor. (It happens) If it is easily reproducible, take it to the dealer when you have a chance.
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Old 08-13-2013, 06:00 PM
Ramzaq Ramzaq is offline
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Could be the brakes need a little more breaking in. Try going on a back road and do a few hard stops (not panic stops) and not to many to overheat the brakes.

Then give it another low speed test and see if it is any different. If not take it into the dealer to be checked.
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Old 08-13-2013, 09:28 PM
Gatsy92 Gatsy92 is offline
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Mine also does this I know exactly what you mean. It's almost like an earthquake in your truck. Everything shakes.
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Old 08-14-2013, 03:09 AM
ValleyRacer ValleyRacer is offline
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Default Suspension travel and rubber bushings

New brakes (new pads & rotors) have a terrific "chomp" (well stopping force) and the truck's mass movement is felt as a chassis shift when the rotor & pad pressure just changes a little bit.

Or as you just inch forward you feel suspension movement due to rubber bushings, cab mounts etc

If you feel a "wobble" in the steering wheel during braking you could have a warped rotor.

If in a few more hundred miles the same thing is occurring it would be OK to discuss w/ the dealer.
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Old 08-14-2013, 02:09 PM
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I think you are just feeling the vibrations going on between the rotor and the pads. The HEMI is a beast and wants to be unleashed. Even at idle, there is a lot of kinetic energy, and with the slight amount of friction going on with just creeping forward, it's vibrating like a 5.7 on the Richter scale.
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Old 08-16-2013, 07:35 PM
rizzkid12 rizzkid12 is offline
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may sound crazy but it may be the gas sloshing in the tank. I have the 32 gallon tank and when it is 1/2 to 3/4 full I feel it slosh and bang a bit when I apply the brakes when in slow traffic.
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Old 08-16-2013, 08:23 PM
huntergreen huntergreen is offline
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i would rule out the the gas slosh first.
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Old 08-23-2013, 07:44 AM
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I don't think it's braking or gas sloshing, my 2009 does the exact same thing and to me it feels like a tourque converter issue. Its most definitely in the drive line not the brakes, I've chalked it up to one of those things that my truck does. LOL
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Old 08-23-2013, 02:41 PM
ZMW ZMW is offline
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I have 2013 4x4 slt V6 - I notice that when braking from 40-50 mph and I get down to maybe 10 mph I feel the truck shimme a little. I always thought it was downshifting into 1st gear and it was slowing itself down on top of my braking...
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