Re: 2500HD deceleration vibration??????
 

I did look under it with the rear end jacked up, running and in gear, and didn't see anything obvious. I could get very slight vibration to, but very little in comparison. I do have the 2 piece drive shaft and am leaning to it being a problem with that. There is a boot around what looks similar to a CV joint. The boot looks fine, but I'm not sure about what's inside. The u-joints appear fine when pushing the driveshaft and I don't see any slop.

I also thought of the rear end. The vibration gets worse as you slow down faster or brake harder, but I don't think its in the brakes. There is no pulsating in the pedal at all and the brakes feel normal.

Re: 2500HD deceleration vibration??????
 

HAD THE SAME PROBLOM ON MY 2001 F350, U JOINTS, REPLACED THEM AND NO MORE VIBRATION :drink:

Re: 2500HD deceleration vibration??????
 

I reeeeeeeeeally hope that is the case. Its going in Mon to get looked at by a real mechanic----not a "service technician"

Tires have been checked and although they have some minor flat spots, everyone seems to be in agreement that the tires would not cause the vibration I'm getting, or if they were, it would not be isolated to just deceleration.

Re: 2500HD deceleration vibration??????
 

My F-250 has done it since new. Sort of feels like a tire that's way out of balance. But it only happens during de-excelleration (braking or coast-down).
On F150online.com many members there complained of the same vibration on all Ford trucks. Ford has not been able to figure out what it is.
Truck has 120K on it now and I've grown used to it.

Re: 2500HD deceleration vibration??????
 

I have a 2002 2500HD 6.0 gas automatic. Does the recall apply to me?

Griff. This is the exact problem I have. Did you resolve this.?

Updating the truck to the hydraulic body mounts will help the problem, if it doesnt have them from the factory.

Dad had an 04 duramax with the same issue around 45, and the dealer put those body mounts (I think it was only the rear 2 mounts they did) and that helped a good bit, but it still did it. 95% of the time the truck was used to tow anyway, so when there was a load in it or behind it, it didnt do it.

Good luck

Sounds like a drive shaft vibration of some sort. Had the same symptoms with my 2010 dodge cummins mega cab turned out the two piece drive shaft was causing it. I installed a one piece large diameter drive shaft and is now super smooth. I don't know how your drive line is configured but if it's a cab and chassis I would imagine it has a two piece shaft with a carrier bearing and I would start there. Just noticed this thread is pretty old but hope this info helps someone.

I have had this happen on 2 of my fords and both times it was the front shock for the steering stabilizer. It's either lose or bad.

Holy old threads!!!

It was the U joints.