Hi all,

I have a Audi Q7 -2007 with the Aisin 09D transmission. The problem is that sometimes when changing gear the transmission will create a loud banging/knocking sound and miss the gear. The rev goes up and it sounds like it is trying to engage the gear several times. As soon as I let go of the throttle and the rev goes down it will engage the gear. It can happen when changing to any gear. Using Tiptronic mode doesn't help. The problem is more frequent if I'm accelerating heavily.
The odd thing is that when the car is cool the transmission works without any issues, it only happens when warm! No error codes has been found. I have changed the oil in the transmission but it didn't help.
I'm thinking it might be something in the valve body or the TCM.

Anyone with similar problems and got it fixed?
I deeply appreciate if someone has an idea of what's causing this...

 

did you find out what was? I have the problem that the N88 solenoid is stack or short to positive, so that prevents me fro start the car sometimes, and after roll the car in neutral it will start
On your case I think it was overfilled with ATV so when it gets hot the box is really full

 

I have the 2007 Q7 with the same issue. It is almost as I had wrote what you have wrote. Just got the car back from Audi after a flush and ATF change but same issue as soon as the ATF gets hot. I need to go easy on the accelerator or it jumps into neutral until you let the revs down and it re'engages which makes it difficult to overtake or merge quickly.

Anybody had similar issue and resolved would be mighty helpful, I tend to think it could be a solenoid or electrical issue now.