I have only used their hydraulic oil booster but I would try this FIX.I agree the noise notes more than a leaking front seal. As you read in the other post link the seal goes because of other parts failing first.
With that being said the transmission may not be dead just yet and the real fix is to pull out 35 $100 bills.
Since you are only four hours from home I would add the 24 oz bottle of fix and at least one quart of synthetic ford spec'ed transmission fluid then check the level with it running per the manual. With the engine not not running full level will be well above the full mark because of torque converter drain down.
I might go two bottles of Lucas Fix but that might be an over kill but i would leave with it one quart over full mark and keep my speed more like 50 MPH. After about more or less 25 miles you might check it just to make sure it was not low. If it was down to the full mark or much below add a quart of ATF. Do you get the picture?
It is just like a leaking tire over time you can judge when it is going to need air.
The objective is to get home and get service on your turf if possible.
Actually you have to give it some thought before you spend $3500 in your case due to age and other factors not important tonight.
The fact you could see the oil level on the stick is a huge PLUS because you did not run it out of ATF which would kill the transmission. I would not be concerned about the condition of the ATF at this point in time but I would add the highest quality ATF to beef up what is in there and LUCAS will help do that too.
