4 degrees might be pushing it, I assume you have full time 4x4? Check the angle of your front companion flange, you might actually be better off without a double cardan. Usually though that angle is way off, which is why the factory uses the DC/CV at least on minis.
Heb Dduw, heb ddim; Duw a digon
I'm that gun-totin', farm-raised, evangelical, pro-environment, OHV ridin'/drivin', Southern civil rights pro-labor Liberal yo' momma told you couldn't possibly exist.