My nephew has a 2004 Dodge Ram 2500 with Cummins, automatic transmission, and 4x4. It's the 4 door version long bed.
He got it with 30,000 miles on the odometer, it now has 150,000 miles.
Every since he got it, the pickup would shake when towing or hauling. It is worse at low speeds but is still detectable all the times if you pay attention. It does it a little bit without a load on it too.
I looked at all u joints, center carrier for the driver shaft was replaced a couple of years ago and seems fine. Drive line looks straight. The shudder starts right from a stop in 1st gear before converter is locked and continues, so I don't expect the converter.
Does the '04 have an extreme issue with axle wrap?
The transmission support has a "V" shaped plate that rides on a matching "V" shaped bracket that is bolted to the cross member. It is not hard to separate them or move the transmission sideways with a small pry bar. The transmission "V" and cross member "V" are not bolted together through the rubber isolation pads. Seems weird, but there is a cross brace on the cross member bracket that goes above the transmission "V" so they can't come apart. Anyway, the transmission mount seems to be the only thing that could cause this issue.
Has anyone had a similar issue of shuddering under load when power is applied?