The tranny in the '07 Sport Trac is one of a few disappointments I have with my "bought new" Sport Trac. I've always been a Mustang man from way back and considered myself a FORD man too but things about my first and only new FORD purchase have me wondering.
Will the V8 Gen 2 Sport Trac with the class 3/4 hitch tow the larger weight...….yes it will. If you do tow the larger weight (or even lesser) will you end up paying for it in the long run? I believe you will. I have always went fairly easy with my Sport Trac and kept an eye out for the "known" issues with this truck. I have never towed with it.
My radiator took longer to start leaking than most and I replaced it last year.
The tranny had the "bump" issue and it was "cured" after two update flashes.
I also am not too happy that FORD decided not to include a dipstick that you can check the fluid level from the engine compartment or at least gave you an option to add one. Maybe most manufacturers are doing that?? I now have a 2 post lift so it is a bit easier to check but still a PITA!
I paid to have the shitty 2 piece plugs switched out and that IMO, should have been a freebie from FORD but it cost me to do it.
I plan on keeping my Sport Trac until I die. I like the concept, enjoy the ride and the look but think FORD should have had a better package in place before they released the Gen 2 for sale.
Of all the GM cars I've owned (and that's a lot of them) I've only had one tranny issue with a Metric 200 or 400 (one of those, I believe) in my 1977 Bonneville Broughm and GM did give me a large refund on the cost due to a recall of that shitty transmission.
To the OP, you'll have to decide whether as Dirty Harry would say "do you feel lucky? Well, do ya??"! Good luck with whatever you do.