Ur very welcome
Sounds really daft but are the tyres all the same size plse
Alas with it being there from the beginning it’s difficult to try and pin a noise down
Has it been to a wheel alignment centre to ensure all the wheels are balanced and a 4 x wheel alignment done
It may be the gearbox but again difficult to tell
Have u posted on the D3 as there may be someone near u that could have a look for u, I’m also pretty sure D2 wheels will fit a D3 as that may also be an option as mentioned , trying to do small things without having to put ur hand in ur pocket, along with eliminating things step by step