Lowered two piece drive line.

[Roadguy]

I’ve read everywhere and can’t seem to come up with a solid answer in terms that aren’t hard to follow. I find tons of info on a single driveshaft but none on 2 piece angles. We’ve lowered my sons 75 c10 truck with some shackles (it’s already got a flip kit) it’s got a low speed vibration when accelerating. I’ve replaced carrier bearing and all the universals. We tried a 2 degree shim today and it’s still there. Could anyone help shed some light on what the next step would be? Raise the carrier? More pinion shim?

 

[eskimomann209]

Don’t go shimming all willy nilley! here are a couple of pics that’ll help you
Eliminate angle issues.

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[eskimomann209]

rules of angles apply. You want to get the operating angles within 1-2 degrees of another. The shorter the driveline the closer you want the operating angles to be.