so my truck is lowered 4/4 or little closer to 4/5. its hangers and shackles in the rear. my pinion is facing upwards a great deal.. i didnt measure it yet but its bad.

now i have zero vibrations anywhere. but when i first take off you can feel a werid rotating in the rear. youd have to experience to know what im saying. kinda of like the angle on the u joints is so bad its not smooth. but once going 10mph or more its fine.

so since im 2wd with a 2 piece driveshaft should i start with the carrier bearing shim or should i buy a 1 to 6 degree shim and go from there to get it to -2.5 degrees?

i hope i dont go and fix this and then run into all sorts of vibrations lol. but i know this angle is gonna hurt me in the long run shortly

also quick question does the carrier bearing shim lower the mount or allow you to raise the mount? im thinking lower it, but that would cause a even worse angle, but i guess i would counter balance that with more shim

 

I'd start with the right pinion angle and work my way from there. Can't help with the other technical stuff tho. sorry.

 

ya i think ill get it right then see how bad the driveshaft is looking and go form there