Clutch slippage? A5 3L Quattro 218PS B9 2017 Automatic

AudiA53LQ

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Hello , so I just purchased a use Audi A5 (2017 B9 3.0L Quattro 218PS auto version I think its an 8 speed gearbox.(Diesel) it has 127000 miles ... It's supposed to have a 3 month warranty. First few days of having it I decided to get it stage 1 mapped and gearbox tuned as well. Driving hard prior to remap was fine I never noticed anything. The remap has taken it from 218 to about 290 ish.
But the day I got the remap done I went to overtake a car I floored it for kickdown and I felt a hard thud like it was knocked out of gear (clutch slipping?) and car went straight into limp mode , "gearbox malfunction no reverse gear" on dash. I pulled in and turned it on and off and it went back to normal , shifts all still seem smooth , no noises or anything, only happens when you floor it/drive harsh acceleration. I tried it once more later , about 70-80% throttle no kick down and sure enough same thing happens again about 3-4k rpm. Here is what obd11 says I'll post it below. Is the extra torque from the remap highlighting a slipping clutch/bad clutch? says something like "excessive clutch B slippage" P081E00. No other fault codes that I can see other than one for A/C.
02 Transmission

System description: 0CL 30TDI RdW
Software number: 8W0927155L
Software version: 0004
Hardware number: 0CJ927156
Hardware version: H03
Serial number: 0000000143
ODX name: EV_TCMDL382021
ODX version: 002024
Long coding: 000001

Trouble codes:
P081E00 - Excessive Clutch "B" Slippage
Intermittent
 
You don't have ZF8HP65A (8 speed tiptronic), your car has DL382 which is a 7 Speed DSG, this gearbox has even weaker clutches than the older DL501, first step is to remove the tune and flash back to standard calibration.
 
Stage 1 should have taken the peak torque from 400Nm to 500Nm. AFAIK the 0CL DSG was rated to 400Nm. Has the TCU tune increased clutch pressure?
Nevertheless since the car has done 127K it seems likely that the B clutch is worn. Both will need to be replaced.
 

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