98 Audi A4 2.8L Quattro Automatic 100k miles

[umoms]

Just rebuilt the trans on this ($2000) and now when I give it gas let go of the gas then give it gas again I hear a clunking noise and the car jerks forward and backward. I only hear the noise when I follow this sequence. I took it back to the transmission shop and they told me it is either from the AWD or Differential unit and not the transmission thats causing it. So I asked if they could repair it and they said it would be 4-5k job.

The transmission and engine mounts looked fine. I took it to a bunch of suspension shops and the suspension was good and the all said it was transmission related.

I talked to a few other transmission places and they told me they should have discovered the issue when they were working on the transmission. The other transmission shops I took it to put it on a left and could not determine what it was externally they all wanted to take it apart and diagnose it and the minimum charge for that is $650.

My question is what do you guys think it sounds like ? Is this normal on this vehicle? Any other ways I can diagnose further? I have a older VAG-Com cable/software but I have no idea how to use the Advanced settings.

What recommendations do you guys have?

[biketsai]

Wow, thats ridiculous. I would just get another opinion from a shop.

[B5Quattro190]

i actually had the same problem with my car which ended up being the car bucking every so often and is a 98 a4 2.8 quattro automatic as well. i ended up replacing the vacuum pump, and there were two cracked cylinder lines of which cylinders 4 and 6 misfired. From what i can remember, i ended up paying 6-700 bucks or so to fix that at the audi dealership. I'd have to look at my receipts from there of when i had the car service for exact cost.

[umoms]

i have taking it to a few transmission shops and they all say the first one is full of it. They said its something internal and its something to do with the AWD and/or Transaxle or Differential. But its internal and they charge $650 to dig further.

i dont think its the same issue as yours B5. Im not getting a bucking sound. Im hearing a clunk and a jerk from the center/or rear.