So ive been doing a bit of research, and im getting kinda confused. So ive added a extra leaf to my rear pack to address the sag in the back and help with towing. Since then, ive got a drive line rumble at about 60 km's and 120 km's. Im aware that i need longer shocks, but i was wondering what the drive line angles are supposed to be at, whats "safe" to run them at, and what options there are to address drive line angles.

 

not sure what the angles are suppose to be at but as far as options to correct the angles you can get shims that fit between the leaf packs and the axle perch, t-case drop kit (easiest imo), or SYE (requires some money).

 

If you are getting a vibration from the driveline, then the pinion angle and tcase angle are not matched. Get an angle finder and check them and make them match. If you do this you can run up to 4.5" of rear lift without any new parts.