While driving at a steady speed, I felt and heard a "thump". First one time, now frequently. It feels like a missfire in the engine, or the rear differential is skipping a few teeth. I am clueless. But the skip is pretty hard. It will not happen under hard acceleration, typically just under steady or light throttle. Any ideas?? Thanks

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05 Silver KJ Limited CRD born July 11, 2005
'88 Suzuki Samurai 4x4
'99 1/2 Powerstroke 4 door Dually 4x4
Kubota B7200 Diesel 4x4
Polaris 700 and 500 H.O. 4x4

If you are feeling this at around 35mph, it's normal.
I don't think anyone here has come up with an explanation for it.
Mine has always done it.
I have just learned to keep accelerating through this shift point.

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TWO Identical 2005 Liberty Sport CRDS
#1 CRD, 174,000 miles. Eco tune, Samco hoses. Mobil1 0-40w used since day one
#2 CRD 143,000 miles. Bought used (unknown history) with 100,000 miles. Samco hoses.
Eco tune, new rockers, and 5 volt glow plugs installed at 124,000 miles