Replacing ZF 8 speed transmission fluid at 135K miles. NOT TO!
Researched online and found out you can find the trans health via Bimmerlink which i bought. As below, all clutch values are relatively healthy except Clutch A. ZF has updated their fill pressure range to be +-300 now. With this being said, the trans is somewhat compensating (likely through friction in the fluid) to maintain pressure in clutch A).
By changing the fluid, i risk exposing this worn out clutch, but this will likely last another 150,000km+ with no issues. as -326mbar is minor wear (typical for high km).
Best case scenario with REAL data from my car - to NOT touch and NOT perform a transmission service. This app Bimmerlink only cost $50 and to be honest it is CRITICAL to figre out if you are required to do a trans. If everything is healthy, do the flush, if anything is borderline high range, better to not touch.
