My 23 Ecoboost AWD came from the factory with 4 qt ATF (~3/4 qt low). It regularly shifted very rough and slipped ~15-20 mph when cold. After drain & fill at 19,000 mi it never occurred again. At 56k mi now with no more transmission problems.
Hope this data helps.
After idling for 5 minutes, for the first few miles while driving home (ECO mode) last night from work at 51 F, my temp gauge was flickering back and forth between 3 and 4 bars and my CarScanner readings were:
3 bars = 177.8 F
4 bars = 179.6 F
I needed 15ft to get connection to capacitor (approx. center of rear seat).
- 1.5ft (Batt to fuse)
- 13.5ft (Fuse holder to capacitor on rear driver's side)