This is why we use a Dimsport HLS 4WD dyno (HLS stands for hydraulically linked system).
We run every newer car with the rollers linked together, regardless of what drive it is. The hydraulics are linked with pressure and electronically calibrated with whatever vehicle information and type is entered in. This allows the car to run passes exactly as it does on the road, no dash messages, errors with ESC or stability, etc.
The HLS I used however at the power the car produces and the sensitivity of the new sensor was not able to read full power as the car tuned it self down by about 15% and not only when the ECM is tricked to a specific diagnostic mode only a engineering level has at car manufacturer this case Audi they were able to run the car correctly.
But again maybe your dyno is newer and better then what me and other multiple people tried and failed with.
2020 V60 CC
It doesnít help that the car places different amount of power to different actual and different wheel however it sees it needing it.
2020 V60 CC
They're not common, but one brand that does work well and is used in the US is SuperFlow.
The new M340i has about the same performance as the outgoing M3. That is quite impressive.
Dave in VA
2012 XC70 T6, AWD (new T6 motor installed 8/27/2015)
2016 Cadillac ATS-V