FLF15084

Hey Guys,

I have an 05 F150 XLT with the 5.4 4x4 and as you can see I installed a 6" BDS lift and 35s with 20s and the thing is slower than heck. I am not looking to race mustangs with it, but I would like power back. Right now I only have a magnaflow catback that dumps before the rear axle under the truck...I see alot of people discussing 4.56 gears, electric fans, custom tune etc...Im just curious what people have done that actually made a noticeable difference and what order you'd suggest doing these mods in? Dont care about the gas mileage aspect of gears, but this coming winter I will be towing a 7x16 enclosed steel trailer on a regular basis, here in wi, roads are pretty flat compared to out west. Just want to make it fun to drive again.

Once this motor goes, I would like to either put a new reman engine in with a supercharger, or find a better motor altogether but will worry about that later.

Thanks for your input!

MGD

Hi.

Biggest improvement will be regearing - no question.Then custom tuning, to correct TS, GR, Speedo/odo, shift points and add some power. Efans a distant third. Forget CAI and exhaust - no gains.

Mileage will still suck.

good luck

grss429

what gears would u go with

PerryB

Ditto on the gears. I would install 4.56's. You may actually see an improvement in MPG over what you're getting now because you wont be lugging the engine. The transmission will probably run cooler also.

FamilyTradition

Gears, decent tuner-sct rdge diablo etc, long tube headers and high flow cats, then I'd go electric fans. Just my $0.02

snowborderus

I would do the tuner first. From what I've read, it's the biggest wake-up for our trucks. I would do gears after the tuner. After those, it's small increases here and there.

MGD

Mornin;

That's true on a stock-tired truck. But when you add that much rotational mass, static mass and reduce the effective gear ratio ( and reduce mechanical advantage ) by this much, gears are actually the most effective first step. Not the least expensive though.

The impact this rolling stock increase has on the 4-speed 4R75E should not be overlooked. Getting the effective gearing back in the stock ballpark will allow the programmer to do it's part more efficiently.

Cheers
Vladsky

bourgeois1269

^^^good point^^^^^

Hanginten24

What's a good company for 4.56 gears for the front and rear? I know the parts themselves are only a couple hundo, but what's the labor like? Def not one I wanna do on my own, I know some folks say it's not too bad, but I want it done right the first time

snowborderus

Sounds like it's more of a 50/50 then for the gears vs tuner.