Yes I had it sorted by Johann Marx after trying several workshops and gearbox shops in Durban who stuffed it up even more by changing propshaft lengths and messing up my transfer case by not fitting the oil pump etc.
Eventually Johann sorted it out by adjusting propshaft lengths and transfer case.
I had to remove my 31.5 x50R15 tyres and the modified rims as I was advised that it contributed towards the vibration.
I am now running 235.85.16 on standard rims. Gearbox was also checked.
I would advise to search on the forum on how to check and diagnose this yourself first before giving to a Gelandewagon specialist. That being said, don't do anything on advise from mechanics or workshops that don't specialise in Gelandewagons.
According to the guys in Durban who didn't know what they are doing, they said the transfer case was either too much back or front and they either shortened or lengthened the propshafts. They then drove it to me with a broken cv. I then lost hope, loaded it on a truck and sent it to Johann and had my uncle checking progress. I later flew up to check on it before putting it on a carrier back home once ready.
I have read somewhere in a forum (if i remember correctly ) that one should loosen the mounts on the transfer box and main box, run the car (maybe on stands) to allow the drive train to align itself? After that tighten the bolts in the new position..not sure if there is any logic in it though..