Gears? - Ford Powerstroke Diesel Forum
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post #1 of 13 Old 03-18-2012, 08:05 PM Thread Starter
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Gears?

Hey guys,

What do you think I should do for gears. Was bouncin the idea around with my buddy about 4.56 but i think ill settle for 4.11. Right now the trucks a sterling 10.25 with 3.55 gears, ZF5, and im rolling on 37" toyos.... great highway haha. I dont want to lose too much highway, and i also tow a decent amount.... and like to go fast

What do you guys think? How do you work out what RPM id be with different gears? Which is the best online vendor for gears? miaswell swap a posi in?

Cheers!


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post #2 of 13 Old 03-18-2012, 10:54 PM
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I would do 4.30, that would be like running 3.73 with stock tires and should give you a good balance between MPG and towing.

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post #3 of 13 Old 03-19-2012, 08:47 AM
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I run 4.10s with 35s. If I was to go to 37s I would re-gear to 4.56 but I also run in some pretty steep mountain terrain.

Jack
97 F250 Xlt, built E4od, D60 swap, Baby swamps, tunes by Dp
1.0 housing w/ wwII, 203* t-stat, diy 6637, 4" exhaust
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post #4 of 13 Old 03-19-2012, 09:09 AM
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I run 4.56s with 37s in my 01, i am ok with them, i wish i woulda went with 4.30s though, alil better on the highway but i dont drive much highway thou so thats ok.

Just depends on how heavy of towing your going to be doing really?? If not that much i would just throw a set of 4.30s and call it good

Robert
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post #5 of 13 Old 03-19-2012, 06:20 PM
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That truck is lookin mean as hell!

1997 F250 7.3 powerstroke SCLB HD XLT
340,000 Mi.
Blown Tranny Mod
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4:10's
DIY E-FUEL
PHP 6 pos.
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Future mods: ??? 1.5 Sticks T500

1996 ECLB XLT SOLD
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post #6 of 13 Old 03-20-2012, 02:52 AM
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I am running 37" BFG MT with 4.10's and turn 2k at 70mph. I also tow a 4 & 5 ton excavator without any issues.

I also am getting 20-23mpg hand calculated...

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95' F-350 CCLB DRW POWERSTROKE
08 Axle/4x4 conversion, 5spd conversion, 6637, 5" SP exhaust, gearhead tunes
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post #7 of 13 Old 03-20-2012, 03:23 AM
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im running 35s and 3.73, makes a great highway truck but a little dogish for towing, uses to have stock tires a 4.10 which towed like a horse in comparison. i run 2k @70mph and will tow much better when i get somesupporting mods to help out!

so if your lookin at 37s,i would go with no smalller then 4.10s, will put you at around a 3.55 or so, all depends on how much you tow?

FRANK THE TANK
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post #8 of 13 Old 04-23-2012, 03:26 PM Thread Starter
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Thanks for all your input! I tow a dump bed for work, tow a boat with a camper loaded too. Where is the best online vendor for gears? Any suggestions for a posi/LSD?
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post #9 of 13 Old 04-23-2012, 03:28 PM Thread Starter
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Quote:
Originally Posted by yngbuck19 View Post
That truck is lookin mean as hell!
thanks man!
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post #10 of 13 Old 04-23-2012, 04:07 PM
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I like Randy's ring and Pinion Home Page Do you still have a tag on the rear pumpkin? If it does and the second letter is a L then you already have a LS.

Jack
97 F250 Xlt, built E4od, D60 swap, Baby swamps, tunes by Dp
1.0 housing w/ wwII, 203* t-stat, diy 6637, 4" exhaust
Diy intercooled, 6.0 fan, Diy 140v Idm, Isspro Ev gauges
On board air, E-fuel, 6" lift on 35's
322000 miles
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