“Clacking” noise at low speeds and Bad Vibration at 80km/h that goes away at 108km/h.

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Zayshley

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Alberta, Canada
First Name
Gage
Truck Year
1976
Truck Model
K1500
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6.6L 400sbc
Been having this issue for a while and I’m not quite sure what it is. Originally thought it was a bad rotor since it’d slow up at a certain point when rotating through the caliper but after replacing it, and the wheel bearings up front, the noise and vibration is still there. Not sure if it could be a bad u-joint or something. Don’t have a video or anything of it happening, but wanted to see if anyone had any ideas or suggestions.
- The vibration changes as the wheel rotates, it’ll be bad then smoothen out then be bad etc.
- Tires are balanced.
Here’s a random photo of my truck just because:
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ali_c20

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The u-joints are the only parts you didn't change so they could be cause of the vibrations.
 

Snoots

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My moneys' on U-Joints.
 

fast 99

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Yes, driveline vibrations will typically cycle in and out. Usually at double the speed of the first occurrence.
 

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