Gear Ratio?

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Apr 2, 2008 | 09:31 PM

#16

spence13e

More Turbo

Joined: Feb 2007

Posts: 713

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From: KS

i would lean to you having 3.55's. my 95 gasser with 3.55 on the stock 235/85R16s ran around 1700 @ 60 and my 04 with 3.73's on the same tire size runs right around 1750 at 60.

Apr 2, 2008 | 09:50 PM

#17

scatgo

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Joined: Nov 2007

Posts: 2,014

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From: Long Island, NY

Quote:

Originally Posted by tjbeggs

Never heard of it. Do you have a f-superduty or a straight up F-350?

F-350. Just looked again it is D5!?

Apr 4, 2008 | 08:48 AM

#18

tjbeggs

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Joined: Apr 2004

Posts: 12,835

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From: Silver Lake Dunes, MI

Quote:

Originally Posted by scatgo

F-350. Just looked again it is D5!?

Beats me.....I would guess no matter what you have 4.10's but I can't be sure.

Apr 4, 2008 | 08:57 AM

#19

dinikin

Senior User

Joined: Dec 2006

Posts: 254

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If you buy your truck for empty or very light towing then yes. 3.55 will yeild better MPG.
4.10 with larger tires will kinda make it 3.8 or close to it.

When towing heavy loads 4.10 will get better mpg,
PLus 3.55 gears are only rated towing up to 10,000lb(if not mistken) and 4.1 up to 15,000lb

Quote:

Originally Posted by Bino2

So just so I can be clear would 3.55 get better mpg than 4.10 and if you have bigger tires can't you get better mpg to a certain extent or in certain situations?

Apr 4, 2008 | 10:33 AM

#20

444dieselrod

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Joined: Aug 2004

Posts: 2,417

Likes: 4

From: Braham MN

Check this out a Google shearch lead me right back here.

Ford Axle Code Chart .: Articles

D5 is 4:10LS gear.

Diesel Rod

Apr 4, 2008 | 10:35 AM

#21

tjbeggs

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Joined: Apr 2004

Posts: 12,835

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From: Silver Lake Dunes, MI

Cool makes since. The DRW trucks have a higher rated capacity so they get a different code. Makes sense!

Apr 4, 2008 | 11:22 AM

#22

scatgo

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Joined: Nov 2007

Posts: 2,014

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From: Long Island, NY

Thanks for the info Dieselrod. Tryed to rep ya but you know how it goes. Got to spread it around. What is up with Limited Slip? Not sure what that means.

Apr 4, 2008 | 12:51 PM

#23

444dieselrod

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Joined: Aug 2004

Posts: 2,417

Likes: 4

From: Braham MN

means if your in the mud both wheels will spin not just one, alot better in these trucks I think, both mine are open and ya get stuck on a wet leaf.

Diesel Rod

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Apr 4, 2008 | 11:23 PM

#24

NWBronco

Senior User

Joined: Jul 2003

Posts: 497

Likes: 0

From: Olympia USA

A limited slip, if properly maintained, is marginally better than an open diff. The friction packs in those go pretty quick even with a friction modifier.

Bob