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  #1  
Old 08-23-2011, 09:58 PM
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Default Truck Suddenly Brakes hard!

I was driving my 2009 Ram 4x4 down the freeway one day and all of a sudden it felt like the brake was hit really hard. It scared the crap out of me, I had thought I hit the brake by accident, but then it happened a second time a couple of weeks later.

Does this sound familiar to anyone? If so, what do you know about it. I am not sure if it was my engine doing something to make it suddenly do that or something else.

Anything will help.

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Old 08-24-2011, 02:24 AM
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I have never heard of that. Here's a bump -
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Old 08-24-2011, 02:36 AM
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I must ask, was there a semi truck or police car anywhere close to you when it happened

the biggest problem with the ABS braking systems in the early stages, was someone keying down a microphone & it caused brakes to lock up
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Old 08-24-2011, 08:23 AM
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could it possibly be he's experiencing a little bit of engine braking?

One of the things my wife pointed out about my truck was that it'll doownshift while slowing, using a lil bit of engine braking

I'm probably wrong, but it's something to consider

good luck

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Old 08-24-2011, 08:57 AM
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Sounds like a Ford. They had/have an issue with sudden down shifts.
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Old 08-24-2011, 09:50 AM
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No I dont remember there being a semi truck or cop around. Also, I was not down shifting, I was going 70-75 down the freeway.

Do you guys think it could be a transmission problem? Or maybe something with the cold air intake?

Im still trying to do more research on this issue.
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Old 08-24-2011, 11:20 AM
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My guess would be either transmission or rear end. Either way you should get it looked at. You wouldn't want it to happen in the rain. You might loose control and that wont be good.
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Old 08-24-2011, 02:36 PM
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he has a 4X4
I would tend to believe it has to do with brakes or bearings

in my town there is a brake & alignment shop, they specialize in 4X4 vehicles
they have accounts with the Sheriff Dept. & Border Patrol, so you know they do good work.

They do free inspections & give you a read out of what they find, maybe you have a similar shop near you
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Old 08-24-2011, 02:53 PM
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Any indication of a Check Engine Light? Did you notice if your RPM increased or decreased during this event?
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Old 08-24-2011, 05:00 PM
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could the engine actually be cutting out for a second or so? Fuel pump or ignition problem could cause "hesitation" - did you watch tach??
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