A friend of mine has an Audi A4 2.5? Diesel v6 thingy - 2005 vintage with an auto box.

When setting off it it is like a normal auto for the first few yards then there is a sort of judder and a thump from the gearbox area then it seems ok again after that until the next set off from stand still.

What could this be?

My initial thought was the gearbox itself, then maybe an engine mount on its way out but then it feels like maybe some sort of torque converter lock up mechanism kicking in in a less than smooth way.

Any thoughts?

Cheers

Mark

[Edited on 16/2/11 by mookaloid]

When he pulls of does it make a sound like ££££-££££-££££-££££

quote:

---

Originally posted by nick205
When he pulls of does it make a sound like ££££-££££-££££-££££

---

maybe the ecu built in to the back of the gearbox done 1 or 2 of these in the past have a look here

http://www.bba-reman.com/content.aspx?content=Audi_A4_Multitronic_Gearbox_ECU

maybe the ecu in the back of the box done a few in the past try here

http://www.bba-reman.com/content.aspx?content=Audi_A4_Multitronic_Gearbox_ECU