Take a look at the front prop shaft. It is a CV style shaft, has internal boots fore and aft. If you drop the front diff too much, it pinches the boots on the "cup" portion of the flange. The flange will deform to fit the new angle, the boot, not so much. The boot is not obvious like the CV joints, as they mount external to the shaft, the prop shaft is internal to the flange assemblies. Crawl under there and look
As for rear axle, I run the adjustable rear lowers, centered the axle and have been fortunate with no problems.
JoeD did my diff drop, CVs are perfectly straight (on a note, they do not like negative angles at all)
The arrow points to the boot location. The curve represents the changing angle as you lower the front differential. As you can see, there is not a whole lot of room for angle change. You may be driving around with ripped prop shaft boots right now. My last shaft boot ripped 3 or 4 years ago, but I never really had problems until I started playing in water and mud. So, if you stay out of mud and water, just add grease every so often, probably be fine. My last one started grinding, it was full of dirt. This new one got washed out in the pond in front of Baby Lion's back at Moab, so it is already making noise. Full of sand and grit.
You learned something new today!! At this point, it doesn't happen too often with the VX!
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