suspected long shaft coupling, or might be your rear axle gear

masa repair gearbox ada tukar mounting sekali tak? kalau takde mounting condition okey ker atau dah kong? kalau kong kena tukar
Please check the following
1. check long shaft coupling
2. u-joint longgar, hantar machine shop
(first part long shaft ke second part long shaft, universal joint U-Joint)
3. terpaksa turun gearbox pasang mounting baru
4. masih tak okay last resort rear axel