Intense driveline vibration, solved

[Scout]

My initial thread vanished, so don't know who to thank. My wife's 2007 had an intense vibration decelerating at about 30 - 20 mph, it could not be identified because everything under the vehicle was tight. Someone on this board suggested that by pulling the drive shaft and checking for a seized U joint, or by driving on the highway and checking for a hot (seized) U joint we'd find the problem. I relayed this info to the shop where the Jeep was at, and that took care of it. There was a U joint frozen solid on the drive shaft. It's good to go now. Thank you.

 

[tommudd]

Lots of people have had the same issue. They think the ujoints are good due to them feeling tight, but in reality they , like you said, are rusted /frozen solid almost.
I remember when mine went, I had check everything crawled under at one point after driving it, happened to lay my hand on the rear ujoint and WOW
Mine had about 50,000 on at the time