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?