Seeking recommendations for R8 diagnostics.

TysMagic

I attended a track event last week and began experiencing unusual problems with the vehicle. It is a V10, S-tronic, VF750. On the first day, the vehicle performed OK; nevertheless, I had a couple of small incidents where the engine momentarily lost power, occurring on two separate occasions without generating significant problems on the course. On the second day, after completing 5-6 laps each session, the vehicle exhibited similar issues but with more severity. I received a Point Bye in the front straight, a high-speed stretch of the circuit. Upon reaching the floor, the vehicle experienced intermittent power loss for brief moments, followed by restoration, and then another loss. I hardly succeeded in passing in this manner, although I ensured my safety while doing so, navigated the track, and disembarked. The same occurrence happened each outing, especially as the vehicle became heated and I was seeking wide-open throttle.
By the last run, I felt I had gained a deeper understanding of the situation. The automobile seemed to disengage from gear, the engine reached the rev limitation, stalled, and then resumed operation, repeating this sequence. This happened rapidly. I released the accelerator at one juncture, let the vehicle to stabilize, downshifted, and accelerated, nevertheless the cycle persisted, with the tachometer fluctuating. I thereafter recognized that my day had over and disembarked off the track. Throughout these incidents, I experienced no warning lights or traction control notifications.
Upon returning home, I scanned the automobile and identified many issues. A fault occurred in the cooling system, but it was a singular incident. Additionally, there are issues related to the turn signal bulb and rear parking sensor, the cause of which is unclear.
My battery is around 4 to 5 years old. The alternator charging seemed OK; nevertheless, I saw battery signals indicating low charge, although there were no evident concerns with starting or operation. This battery issue occurs only when I deviate off the track, which is peculiar and has persisted for the last several years, with no apparent explanation. It has never impacted the vehicle.
There is an abundance of material; nonetheless, I want suggestions on where to start my search.

TysMagic

Attention R8 specialists: a new symptom has emerged. I attempted to relocate my automobile from the trailer to my residence. The vehicle rolls well; but, while accelerating, the transmission slips out of first gear. Nearly became immobilized in the center of a busy roadway; fortunately, I managed to reverse around 200 feet into a parking lot. I have included a little video demonstrating the "A" for Auto sign flashing from A to A1 while in gear. It seems that the automobile is aware of its transitions between gears; nonetheless, the reason remains unclear. Is this the converter or an electronic solenoid?

mezy

It is advisable to examine the transmission for error codes. It may be a malfunctioning mechatronics device, however it is difficult to ascertain without more data.

TysMagic

The transmission is not exhibiting any issues, which is unusual. Following my study, I discovered information about the Mech unit. I also saw a video on how to restore the car's TCM to factory default settings. I will need to do that to eliminate it as a possibility.

mezy

You may also examine the measurement blocks to see whether the two pressure control valves are generating any pressure. These valves provide pressure to the clutches. Upon accelerating from a halt, the pressure increases and activates the clutches. If these pressures decrease concurrently with the clutch slip sensation, it may provide as an additional data point.

TysMagic

Will that be accomplished with Vag-Com?

mezy

Indeed, via vag-com in the automatic gearbox module.

norwaj

I was initially inclined to propose overheating until the transmission curveball emerged.

TysMagic

I believed it was the trans; it now seems rather certain. It was also discovered that there are position sensors in the transmission; it is possible that one of these sensors is malfunctioning and failing to provide accurate data, resulting in the inability to choose a gear. The video clip does not depict it, however while accelerating regularly, the transmission disengages, causing the engine to rev erratically, accompanied by a flashing gear indicator. It is peculiar because it displays a "A" independently when the vehicle is not in gear. I am awaiting a response from the Indy I frequent on the drop-off schedule.