Why is my truck hopping?! - Dodge Cummins Diesel Forum
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post #1 of 5 (permalink) Old 02-05-2015, 10:46 PM Thread Starter
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Why is my truck hopping?!

I'm hoping someone on here can help me out. I have An 07 3500 single rear wheel with 230,000 miles and for some reason while in cruise control and driving on a downward grade when it tries to slow it self down the whole truck starts shaking. Almost like its hopping and I have no idea why that is?

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post #2 of 5 (permalink) Old 02-05-2015, 10:59 PM
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I think I can help... Does it look like this?
(Sorry man I been dying to use this one... )

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post #3 of 5 (permalink) Old 02-06-2015, 06:33 PM
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Check u-joints and the carrier bearing. It only does with the cruise on?

01 370k 2wd dually auto. 5" Straight pipe-TST Comp stacked w/ Flashpaq-Raptor 100-Issopro fuel,boost,egt,trans temp-Fluidamper-hx35-bhaf-over engineered engine vent tube
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post #4 of 5 (permalink) Old 02-06-2015, 07:08 PM Thread Starter
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U-joints were just replaced and yes it only does it when cruise is on and I'm going down hill
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post #5 of 5 (permalink) Old 02-06-2015, 07:12 PM
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I had a vehicle do this, was the trans mount

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