DP Tuner is a good choice. I run one with 6 positions.
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Sold 02 F350 Lariat CrewCab Toreador Red/ Silver DRW LB AT 4X4 4.10 gears, BTS custom chip, and tranny. built BTS and Ford Tough! 859,532 miles 
SOLD: 02 F350 Lariat CC Toreador Red, DRW AT 4.10 gears, BTS custom chip, and Tranny 214,550 miles,Built BTS, and Ford Tough!
Sold 94 F350 XLT SC DI DRW 5Speed 314,000
Lifetime Member "BTS BUBBA" Association
"Ain't no feelin like BTS mobilin"
SLAPS Member
Sold 62 Corvair 95  Bus
92 Buick deuce and a quarter
03 Ford Windstar- Granny Hauler
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