I think I have 4 degrees but they might be 3 - I'll have to look.You should be running at least 3 degree shims on the axle, pics will help.
My continued research seems to say the same thing - is this something I should take to a driveshaft shop or is there an out of the box solution.Post a picture of the angle you driveshaft is at.
at 4” you probably need to look into changing the CV to a ujoint.
I have more lift than you, but I went with double cardan up top and single ujoint on the bottom. I highly recommend it, my drivetrain has never felt this smooth.
If it's a double cardan 1310 type, then yes all day.Thanks @IM1RU and @RoadKiller2006 that makes sense.
I have a 4 degree shim right now - thinking i may have to drop it down to a 3 degree or less?
what are your thoughts on this driveshaft with 1310 conversion?
1310 CV Rear Driveshaft by J E Reel, Nissan Xterra, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, (N50)
Yup, i took a look at his photos and it's in the right way for sure. Maybe running no shim and just on the leaf's will resolve your issue.No , they're installed the right way. Just best to really measure what you need. shackles, type of leaf pack, these things all effect pinion angle in different ways, so one dudes 4" lift isnt the same as someone else. You obviously need less shim than you have.
With no shim was the pinion still slightly angled up? Under acceleration, the pinion angle will increase slightly due to the torque/axle wrap effect. You actually may need to flip the shim the other direction so fat end is towards the back then to get the pinion angle even further down if that makes sense. No one right way to do it i guess, but you do want that drive shaft to be nearly straight into the diff housing (no angle) to prevent the vibrations.I did start with no shims - and i had a usual vibration - it wasn't terrible but definitely noticeable.