2006 f150 5.4 H9 axle so 3.55 limited slip. I have 35 inch tires and planning to re-gear. I Have a gryphon programmer custom tuned and cold air intake. I was thinking 4.10s or 4.11s would be good since I just do city driving and off-roading, and on the highway. If any of you guys have ran 4.10s 4.11s or 4.56s with 35s or just have experience with gears let me know how much much power I will get back from losing all that power from the larger tires.

 

Yer not gaining power - yer returning to near-stock torque multiplication. Consider 4.30's (if 2WD) or 4.56's (if 4WD) to actually see some true re-gearing benefits.

Keep in mind that you are still running more unsprung weight (static mass), more rotational inertia, higher rolling resistance and poorer aeros -

NONE of that is going away. Hence, you will still be behind the curve - both power and mileage-wise - over stock.

good luck

 

I just regeared from 3.55 to 4.10 and only run 33s. Go with 4.56 for 35s.