Kotta390
Senior Member
What is the differences between overdrive on and off. The only thing I can tell is the shift points are moved some and that's it? I couldn't tell if the shifting got any firmer or anything else?
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The 8 speed will run through all 8 gears.should not let the truck shift into 6th if a 6 speed or 8th if a 8 speed, also as u apply breaks it will tell the truck to down shift to help u slow down, it will also hold gears longer- I use mine when city driving so the damn thing isn't running through all the gears from light to light.
So basically all it amounts to is slightly different programming of the transmission and nothing more. Interesting it will stay in 8th gear while towing, seems a little sketchy.
on my 09, when I use Tow Haul, I can feel it hit overdrive but it does not lock the torque converter (i think) it changes the shift points and disables MDS. I love the way it downshifts.
should not let the truck shift into 6th if a 6 speed or 8th if a 8 speed, also as u apply breaks it will tell the truck to down shift to help u slow down, it will also hold gears longer- I use mine when city driving so the damn thing isn't running through all the gears from light to light.