My D3 with about 130k on the clock had a significant shudder that the genuises who sold it to me could not diagnose... they actually thought the chassis ballasts may have been a cause even after me telling them repeatedly it was a trans issue. Anyway... never going back to 'that' Adelaide dealer again. [:(]
The shudder on mine was apparent only under load and incline and the tacho also used to hunt when cruising. The local auto mechanics (Lonsdale SA) diagnosed it pretty easily and after $660, I now have a complete service and pan changed over to one that can have the filter changed... next service is around $00 they say as a result.
Best thing is.. the shudder has gone!! Like having a new beast to drive. Back in love with the D3... that's how bad it was getting.
Service the ZF regularly... BIG tip #1.
Cheers.

