I have a 2009 Ford F150 with a 6' lift. I store my truck during the winter on jack stands to keep pressure off the tires. This is the second winter I have done this. During the two winters while on jack stands, the transmission fluid is leaking but only when on jack stands. I dont understand why this would be happening, I've asked around and nobody can figure why this would be happening. If anyone could help me solve this problem, I would appreicate it.

 

there is a bulkhead connector on the passenger side of the trans above the dipstick where the trans plugs in, they had a TSB back in 09-10 where the connector would leak trans fluid and fix was a new connector, unfortunately you have to drain the fluid to get to it to replace it so prepare to just do a normal trans service with filter while installing the updated connector.
If you have the extended warranty it may also cover this problem