Auto box issue

[helljcat1]

Hi all,

 

hoping one of you geniuses can help....

 

Just recently there appears to be a jolt coming from the transmission tunnel area of my 2005 a6 4.2 quattro auto.

 

It only happens at a certain speed and when the car has been on a long run. Its fine under acceleration, on motorway and higher speeds.

 

It happens at approx 40 miles an hour when holding a constant speed and is very intermittent, some days nothing sometimes 4/5 times a day but only when the car has been running for an hour or so. It is quiet noticeable at the time then seems ok for a bit.

 

Is it a sign of bad things to come??? :(

 

Many thanks for any help!

[helljcat1]

Hi,

 

managed to isolate the fault....it appears that the jolt happens when i am decelerating and the gearbox goes into 5th gear at about 40mph. If i use the manual function and go from6th to 4th at the same speed there is no problem.

 

Any ideas????

 

Thanks for any help!

[Audi Owners Club]

Have you started with the easy things like getting the gearbox oil changed? It's amazing what faults this can sometime sort!

[helljcat1]

that is my next step with filter change,also do you know if the ecu would need updating??