RS6 Transmission Slipping & Rough Shifts Need Diagnosis

Had similar symptoms on an Audi S6 V8. The rough shifting and transfer case limp mode turned out to be more complex than initially suspected. The fault codes revealed multiple powertrain malfunction warnings linked to the ABS system. What appeared as transmission issues was actually caused by faulty wheel speed sensors feeding incorrect data to the traction control system. This triggered the transmission to enter protective mode. The repair required: Complete ABS sensor replacement, Mechatronic unit recalibration, Transmission fluid change, System reset to clear diagnostic trouble codes The issue was serious as it affected multiple vehicle systems. The faulty ABS sensors caused a chain reaction, impacting: Transfer case operation, Gear shift patterns, Traction control functionality, Overall transmission behavior Would strongly recommend getting a proper diagnostic scan focusing on both ABS and transmission systems. The symptoms often mislead towards transmission problems when the root cause lies elsewhere in the vehicle electronics. Make sure to have the entire system checked, not just the obvious transmission components. These vehicles have complex integrated systems where one fault can trigger multiple consequential issues.

Thanks for sharing those details. Your issue sounds remarkably similar to what I experienced. My gear selector also started behaving erratically before the full powertrain malfunction symptoms appeared. The transfer case issues were particularly concerning when the car went into limp home mode. Just wondering, what did the full repair cost you in the end? And has everything been running smoothly since the fix? My repair bill was significant and Id be curious to compare notes on the diagnostic trouble codes they found in your case.

Had all issues resolved completely at no cost. The transfer case limp mode and powertrain malfunction warnings disappeared after the control module recalibration. The root cause was indeed linked to faulty ABS sensors triggering false readings. The repair was covered under an extended electronics warranty since the consequential faults stemmed from the ABS system. The diagnostic scan revealed identical trouble codes to your situation, mainly related to incorrect wheel speed data affecting the transfer case operation. The transmission has performed flawlessly for over 30000km since the fix. No more erratic gear selector behavior or protective mode activations. Would definitely suggest having your control modules thoroughly checked, as these integrated systems often create chain reactions of fault codes. The key was finding a shop that understood how these systems interconnect rather than just focusing on transmission components alone. The total repair would have been around 2800 Euro without warranty coverage.

After months of trying to fix my Audi RS6 transmission issues, I finally found a good repair shop that properly diagnosed the problem. Similar to what you experienced, my powertrain malfunction alerts were triggered by faulty wheel sensors rather than actual transmission problems. The repair bill came to 3200 Euro covering: New ABS sensors all around, Mechatronic unit service, Full transmission fluid flush, Control module recalibration, System diagnostic reset The fault codes they found matched exactly what you described, mostly related to incorrect wheel speed signals causing the transfer case to enter limp mode. The shop explained how these seemingly unrelated systems are actually interconnected. Been driving for about 2000km since the repair with zero issues. No more rough shifting or erratic gear selector behavior. The transfer case operates normally now and the car feels like new again. Really glad I got a proper diagnosis instead of just throwing parts at the problem like the previous shop suggested.