ok i got a driveshaft out of a d35 it is longer and tomorrow im puttin it up on my lift to get a better look at the engagement as far as the lift goes its rancho springs and shocks with 3 inch blocks in the back actually i was just turning around in the woods and it fell out ass end wast really flexing much
the 3" blocks caused severe axle wrap and thats why the shaft fell out. did you check that the spring centering pin didnt come out of the block causing the axle to spin. or the blocks rotated off the spring perch.
3" blocks and stock springs are a recipe for disaster.