Thunk and Violent Shaking when Accelerating

[Gaius]

The truck had been going "thunk thunk thunk" when aggressively accelerating below 20mph.
This weekend I towed ~20k lbs through some hills and it got much worse. It's now a violent vibration and it occurs at all speeds when accelerating.

I'm guessing it's a driveshaft issue.
Looking down there I see some kind of collar at the base of the cab that looks damaged. Pictures attached.
Could that be my problem? And if so, what's the part number?


09 3500 6.7l Cummins 6 speed automatic
2 wheel drive, crew cab, long bed

 

[jws123]

yes that is in fact your problem you need to change the center support bearing on the driveshaft I would do new ujoints while its apart.

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[MrBonez]

yes that is in fact your problem you need to change the center support bearing on the driveshaft I would do new ujoints while its apart.

2009 DODGE RAM 3500 PICKUP 6.7L L6 DIESEL Turbocharged Drive Shaft Center Support Bearing | Shop Now at RockAuto

Drivetrain Parts and More for Your 2009 DODGE RAM 3500 PICKUP at Reliably Low Prices. Fast Online Catalog. DIY-Easy. Your Choice of Quality. Full Manufacturer Warranty.

www.rockauto.com

Yep - Do it once, do it right or you'll just be in there again before long.

 

[Nick@GotExhaust]

Thats it! Definitely do new u joints.