3.55 gears - Page 3 - Ford F150 Forum - Community of Ford Truck Fans

08-09-2016, 09:23 PM

#21

Jake Bergren

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Quote:

Originally Posted by lanesteven4570.

As anybody run the 3.55 gears in a f150 4x4. I'm thinking about doing that in few weeks. Wanted yalls opinion would be going 3.08 to 3.55. My truck has the 4.9 straight 6 it has 31 inch tires on it now, in few months will be puting 4 inch lift kit on 33's truck had the e4od trans, I will be doing 90% of my driving on interstates after May.

Right now I have the same setup. On 33s and 3.55 gears in overdrive it seems to slowly lose speed past 65 mph. But when I turn off overdrive I can maintain speeds up to 80 mph but in order to do so I'm at about 2.9k rpm at 70 mph and 3.4k at 80 mph. I'd switch to 3.73 gears for 33s so I could maintain faster speeds in overdrive to save a little bit on gas.

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