Pimp My F150: 2007 Saleen S331 Sport Truck

I always imagined that Steve Saleen was some kind of a magician with the way he could build and sell cars. Not that his recipe for success was magic (take a basic car, add some scoops, more horsepower, racy name, boom). No, his spellcasting was reserved for what he could convince buyers to pay for his pimped out Ford/Saleen machines. Let’s take the Saleen S331 Sport Truck for instance: It starts with a 2007 $19k Ford F150, add a supercharger, those scoops, some head rests, big brake kit and $55k MSRP…yikes! With mark ups like that it’s no surprise the Chinese government is currently embroiled in some kinda kerfuffle with Saleen involving a failed business venture in Shanghai — but that is a story for another time and we’ve got a good deal on a well depreciated F150 Saleen thing. Find this 2007 Saleen S331 Sport Truck offered for $16,500 in Rochelle Park, NJ via craigslist.

From the seller:
2007 Saleen/ Ford
condition: excellent
cylinders: 8 cylinders
drive: rwd
fuel: gas
odometer: 90000
paint color: red
size: full-size
title status: clean
transmission: automatic
type: pickup

2007 Saleen S331 Supercharged
90,000 miles
KMC 22″ rims
Pioneer head unit
Saleen tonneau cover
Saleen head rests
Saleen big brake kit
Very rare
2 small locations where clear coat is coming off
Scratch on the rear bumper cover
Slight slip in overdrive
Low mileage for a 13 year old truck, must be seen to appreciate

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“Slight slip in overdrive†translates to “I’ve driven this truck hard and it’s time to sell before I have to pay for transmission workâ€
I wonder if Saleen did anything to beef up the tranny to handle the added power. The F-150 seems to have a decent transmission, but it wasn’t designed with a supercharged engine in mind.
Wow, more of a difference in horsepower and torque specs for these than I had realized.
According to SCOAT the 351(5.7)SC put out 450BHP @5000 RPM and 500 lb-ft @4000 RPM. And there were only 295 made!!
According to ford-trucks.com the F-150 351 (5.7) put out 300HP @5000 PM and 365 lb-ft@3750 RPM.
I looked at many car and truck magazine articles from when they came out and there is no mention of transmission upgrades that I could find. I am sure that definitive info is available on SCOAT website in the forums behind the paywall.
With 90K miles maybe the transmission is just getting tired.