Allroad 2.5 tdi rear diff help/ advice.

[ben0069]

HI,
I have a 2004 allroad tdi 2.5 v6 bau, manual 01e gearbox, I also have a 4;1 centre diff, I am getting a lot of thudding only on slow turns from standstill both ways, I had this before I changed the centre diff too, and have changed oil. The part number is 01R 500 043 R and the code is ENX on the diff, the ratio is 35.8. Do I have to have exactly the same diff or can I choose from ENY,GKH or FCE codes all of which have different ratios ?
thanks
ben

[Scotty@Advanced]

Must be the same

[ben0069]

Thanks Scotty, have you considered doing upgraded rear diffs at all ?

[Scotty@Advanced]

Other than a wavetrac diff there isn't much to upgrade.

[ben0069]

I'm looking at one from shokan parts same code ENX they say the one they have came from an auto do you know if that makes it incompatible ?
thanks