I think you DO have custom tunes, is that right?
I'm a bit surprised at your +10 shift settings. Bill sets up the shift pressures to be about optimum in his custom tunes, and I've left mine at 0 - the shifts still feel like a "boot" in the rear to me. Bluejay, long time user of custom tunes over on the f150Forum uses only a +6 firmness setting I think on the 3-4 shift.
But, you're talking about downshift, which may be a whole new thing. I wonder if the torque converter is staying locked longer than it should? Possibly try adjusting the TC unlock in the positive direction for 4-3 downshift? It won't hurt anything to try, and I'd try a setting of +5. (You can go all the way to +/- 10 at 3-4, 4-3 upshift/downshift).
If that doesn't work, I expect the Mad Doctor will have to work his magic.
- Jack
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2024 F150 Platinum SCrew 3.5L PowerBoost FX4, Peragon Tonneau Cover, LineX Bed, 35% Window Tint on All Sides and Rear, Full Nose Paint Protection Film, Husky Mud Guards, Lasfit Floor Liners, VIOFO Dash Cam
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Sat, April 18th, 2009, 10:43 AM
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