Thread: D300 transfer case replacement

Hi all.
Enquiring if anyone has had a successful outcome from having the transfer case replaced. Sorry for the long thread.
We recently traded a relatively trusty D4 on a 2021/MY22 D300. On our first trip towing a 3.3 tonne van vibrations set in under load up modest hills on the Pacific Highway at around 80-100kph, after only about 500 k’s. No faults were found after the car was checked by a dealer through roadside assistance and we were advised to continue “under observation”.
Diagnosis by our local dealer after the problem continued is that there is excessive play in the front propellor shaft at the transfer case and rubber chunks were found in the transfer case. The dealer has been helpfull with a quick diagnosis and arranging replacement of the transfer case in a reasonable time frame.
All this started at around 29,000 K’s and with all loads being within limits. Heading home the vibration also started occurring on flat roads under load.
It now seems vibration under these circumstances has occurred frequently, with generally the e- diff being replaced or both the e-diff plus transfer case.
So we would appreciate advice as to whether what seems like really unusual replacement of normally tough components like these has resolved the problem, particularly long term. And also if possible why both items needed to be replaced at the same time, in some cases.
Cheers

Another AULRO member has had a couple and IIRC the last one seems good. LR dealers now have a specific test if owners suspect a problem.