Ford F150 4×4 leaking transmission

When the shop put your transmission back together they forgot the gusseting that fits around the transmission pan and its cover. The reinforcement to the cover is meant to provide a moisture-proof barrier between the transmission pan and the world outside. Take your F-150 back to the shop, have the tech put it up on a lift and take a look. The chances are very good that the tech will find something missing — the gusseting. Don’t be surprised if they give you some sort of double-talk about needing to put it back up on the lift “because we found something else that’s minor and should only take a few minutes.” That’s code for “we forgot something and need a do-over.” Be patient, it’s fixable, quite easily. By the way, it’s not going to cost you a thing. If someone tries to bill you — it’s always possible — remind whomever that they did the work in the first place and that it should have been done correctly the first time.