Ooooch! That's a shot to the nuts!
10R80 is an expensive transmission new: $5400 via parts.ford.com
I'm assuming you're also going to check with reputable transmission shops on the cost of a rebuild, which I would hope would be half the cost of replacing with new.
With the 10R80 being a "sealed" transmission, there is no dipstick topside and only a stubby dipstick on the transmission you need to unscrew from underneath. Even the Ford F150 maintenance schedule indicates transmission fluid level is only checked if topside dipstick available:
- Inspect automatic transmission fluid level (if equipped with underhood dipstick)
so I'm sure Ford will play this card to absolve them of the responsibility of checking tranny fluid level during your oil changes.
With your being > 2 quarts low on transmission fluid, I would have hope that a P0868
DTC (Diagnostic Trouble Code) for "Transmission Fluid Pressure Low" would have been thrown before complete transmission failure, but alas you indicated zero codes were thrown.
I've seen multiple comments on various forums about Ford intentionally shipping vehicles from the factory with the transmissions short at least a quart of transmissions fluid to save Ford $$$, though I can't understand how they could do this if they truly intend for the 10R80 to be a sealed transmission that isn't intended to be touched until its first fluid change at 150K miles.
I've been waiting for Richard at Precision Transmission
to tear down/rebuild a 10R80, but being a fairly new transmission and his specializing on GM transmissions, I have yet to see a video from them on the 10R80. I've been meaning to ask Richard or Trent for their opinion on sealed transmissions, as 150K miles seems way too long an interval to me, sealed or not...
Sorry to hear the news and I'm not even sure what to say at this point, other than your experience gives me another reason to go with the PPE Deep Transmission Pan at 60K:
and maybe ask my dealer to proactively check the transmission fluid level, even though Ford maintenance schedule indicates they don't have to check. Note-to-self to check with my Service Manager on his opinion on sealed transmissions and after-market deep transmission pans.
Not sure if any of the class action lawsuits on the 10R80 offer any relief, but you can google on that term or reference this post on our forums:
Good luck getting this sorted out.