Slight Vibration in rear end

[Tremoring4fun]

Just checking to see if anyone else is experiencing the same issue. I am getting a vibration in the rear end when at a constant speed and the rpm's are fluctuating by 100-200 rpms. For example, at 79mph my rpm's are 1900. With slight changes in the road my rpm may need to jump up to 2000 to maintain speed. When that happens I get a vibration in the rear end almost like I ran over a bad part of the road. It doesn't matter the speed you are running necessarily, and if the truck downshifts there is no issue. It's almost like the transmission and rear end are not sure what to do. I will be taking it to my dealer soon, but thought I would get some ideas from anyone else that has the same issue. My truck is a 2022 Ford F150 Tremor, 3.5 ecoboost by the way with 121k for miles.

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[Tremoring4fun]

Well, it turns out what I thought was a vibration in the rearend was the torque converter. Getting new one installed in a couple of weeks. Hopefully this will cure the vibration and I will be good for another 125k miles.

 

[Bluegrass]

The engine rpm changing is the clue of short time slippage shaking the whole truck.
De Trans.. De Trans most likely in a 10r80 10 speed.
Good luck.

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