Trans Cooler vs no Trans Cooler
6/20/14 @ 3:35 PM
6/20/14 @ 5:38 PM
6/20/14 @ 4:19 PM
6/20/14 @ 4:12 PM
6/20/14 @ 3:49 PM
1500 lbs seems like a walk in the park for your Expedition, if it were me, I'd skip the trans cooler.
OTOH, since the parts cost less than $100, if installing the cooler would give you sufficient peace of mind, at that price, it seems like a relative bargain.