Used it on my old 2005 6.8L and it did great things. I thought these new units would be more tuned from ford but I guess not. I added one to my 2016 which has the new ford 6 speed transmission. Right off the bat I noticed 3 things:
1. Smoother shift pattern
2. Engine braking improved as the stock only dropped one speed.
3. Kept in gear longer on a large hill (Cajon Pass)
4. MPG went up about 0.6 MPG - long hall.
To me the biggest is the transmission downshift for engine breaking when in TOW/HAUL mode. Saves Brakes and keeps speed lower when coasting down a large mountain.
You will love it.
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Garrett
Southern California
2018 Thor Challenger 37KT
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