Welcome to the HERD; lots of friendly knowledgable folk in these forums!
The SportTrac with V6~4.0L~SOHC Engin + 5r55e Trans + 1354 TCase +...
does have specific weaknesses+quirks, but if those items are addressed+maintained proper,
it can certainly be a lasting & reliable vehicle.
PS:
Adding Year+Model \ Engin \ Trans \ TCase \... specs to your Profile+Signature+Threads
will encourage responses & expedite answers to your questions.