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My truck does the same thing. I believe its the axle shafts in the rear of my truck too. is your truck lifted?this is a dumb question, but does it get worse if you have something on the hitch? My truck has a similar vibration and when I have our Thule bike rack on the hitch, it makes the vibration even more noticeable.
I’m starting to think mine is the axle shafts (rear).
I’ve replaced cv axles, wheel bearings, rebuilt the rear diff, shocks, balanced/rotated tires, had the wheels checked for bends…
At 45, it feels like the rear end of the truck is moving up and down vertically. At 65, I start to feel it again and it comes and goes at any speed over 65. Im at a loss.
No, just a level. Rear is stock.My truck does the same thing. I believe its the axle shafts in the rear of my truck too. is your truck lifted?