Have 2005 TDI with 276,000 miles. Used trans put in about 50K ago, not sure mileage of that or torque converter. Transmission light this summer on and off several times. On the road 50K a year and had checked out at independent shop, they were not sure but thought a solenoid. 600 miles home and noticed running 600-700 higher RPM. Took to local VW specialist and came up with these codes:
17125- Torque Converter Clutch: Stuck OFF/ No power being transferred
P0741-003 Mechanical Failure- MIL ON
Shop admits they are not trans experts and will replace the torque converter if I want, but said had similar car before and torque change didn't help. The only thing is now that colder weather is here RPM are running where the used to be till the day gets hot. On the highway the RPM at 75MPH are at 2700-2900, when used to be 2300-2400. Once since this happened went into safe mode while on a mountain. Just not sure if torque converter or trans. Maybe should go to dealer and get over mistrust(even though I know they have more advanced training). Just last three days a noise has started, not sure if related. Sounds like a belt, but speed of sound does not increase with RPM's. Between a belt and metallic light rubbing sound. ???? Refuse to give up car because this wagon is perfect and the most comfortable sporty car I've had for long mileage trips.