Problem with auto gearbox audi a6 1.9 tdi (tiptronic)

It is inside the transmission.

I’m happy to help further over the phone at https://www.6ya.com/expert/anthony_dda4e0152e94f3c0

Is it not shifting into third gear (meaning you're at redline and the car won't shift), or is there not enough power to get the car going fast enough to warrant going into third gear? Have you checked to see if the car is in limp mode?

it is slipping; you will need to rebuild or replace the transmission.

It is imperative you use the correct fluid in your Audi tiptronic transmission. Look in your owners manual for the correct fluid. If you do not have an owners manual call your local Audi dealer or better yet drive to one and purchase Audi Pentosin A/T fluid from the dealer. Do not use Dexron III as it is not designed for the Triptonic transmission. A transmission is very expensive to replace so do not take any chances and just buy your fluid from your Audi dealer even though you may pay a little more. That way you are 100% sure you are using the correct fluid.

no the oil in the gearbox needs a top up

the problem sounds like mine i had all the fluid and filter in gearbox changed it sorted the problem out
micky

You need to give the car a scan, preferably with VCDS (or VAS at a dealer). If limp mode is activating (lit up gear selections), then it will be storing codes.
The fact that it works to a degree could be good news, the gear box has likely not failed. Could be the F125 selector switch, which is a common fail at this age.

Have you had the vehicle put on a diagnostic machine, does the car feel slugish, any lack of power, we have seen a lot of these vehicles with air mass sensor faults. When they fail they do not show a code but with the right scanner they can be seen not working. This affects the gearchange because the ecu does not have the correct data to shift. Of course it could also be the transmission is in need of overhaul. but i would take it to a good diagnostic garage first. It is not uncommon for the air mass sensor to fail after it has been disturbed or knocked in the workshop. we have never found out why.

I have been having similar problems. The clutch is slipping as thats how you get the variable gears when in full auto, but this is where the problem comes from, some garages (auto gearbox specialists) are now able to fix it. Do not go to Audi as all they do is replace the gearbox (very expensive). There is no quick fix though! Sorry for the bad news!!

The Gearbox Control Unit Is Defective Inside The Rear Of The Gearbox