http://www.motorcraftservice.com/vdi...p;menuIndex=18
http://www.motorcraftservice.com/vdi.../Dobdsm304.pdf
Found this to be a suprise.
NOTES: 5R110W has a feature called "Cold Mode". If TFT is below 0 deg F, the transmission will limit
operation to 1st, 2nd, 3rd, and 4th gears (5th and 6th gears are disabled). Cold mode remains in effect until TFT
rises above 0 deg F or vehicle operation (based on shift times or heat generated by driving) indicates that
TFT should not be in the cold mode range, at which point normal operation is enabled.
I searched for a while to find this and couldn't find the thread where I wanted to post ot so I made a new one.