The difference is incredible. The truck always had gobs of pulling power. Now it is also quick. It sets you right back in the seat. It's a different truck up on the highest settings. Supposed to add 124 hp and 303 lb-ft(at the rear wheels). I pull a 29' travel trailer with ease on the lower settings. They tell you in the owners manual not to tow anything in the higher settings because you can tear the torque converter out of the truck. I now have a sporty truck with stump pulling ooooomph.
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