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Discussion Starter #1
Hey guys, how can I find out what size gear is in my truck? And if its limited slip. Is there a site where I can cross reference the numbers from the sticker in the door jamb? My sticker shows an axle code of 31.

Thanks!
 

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Rock Star
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the gar ratio is on the tag on the back cover. and if it's an LSD or not, if you have over 10k miles, you do not have an LSD, the stock ones are weak and don't hook for anything with a few miles on them.
 

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Discussion Starter #3
Thanks, I'll go check the tag. If it is limited slip it doesnt work. I'm doing the one wheel peel all over town. Just turned 10k. I also heard that the only way to get LS in a 250 was if it was 4wd. Is this true?

Thanks Again.
 

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If you order the truck with limited slip you get limited slip. If the dealer ordered it they bought somethin cheap and marked up the price. 31 is 3.73 non limited slip.

The following lists the gear ratios on rear axles for 2004.

31 — 3.73 non-limited slip, F-250/Excursion
32 — 4.10 non-limited slip, F-250
41 — 3.73 non-limited slip, F-350
61 — 3.73 non-limited slip, F-350
73 — 4.30 non-limited slip, F-450
75 — 5.38 non-limited slip, F-450
78 — 4.88 non-limited slip, F-450
81 — 3.73 non-limited slip, F-350
88 — 4.88 non-limited slip, F-350
95 — 5.38 non-limited slip, F-550
98 — 4.88 non-limited slip, F-550
C1 — 3.73 limited slip, F-250/Excursion
C2 — 4.10 limited slip, F-250/Excursion
C3 — 4.30 limited slip, F-250/Excursion
D1 — 3.73 limited slip, F-350
D2 — 4.10 limited slip, F-350
D3 — 4.30 limited slip, F-350
E2 — 4.10 limited slip, F-350
E3 — 4.30 limited slip, F-350
EW — 4.10 limited slip, F-350 (ambulance package)
F1 — 3.73 limited slip, F-350
F2 — 4.10 limited slip, F-350
F6 — 4.56 limited slip, F-350
G3 — 4.30 limited slip, F-450
G5 — 5.38 limited slip, F-450
G8 — 4.88 limited slip, F-450
GW — 4.88 non-limited slip, F-450
K5 — 5.38 limited slip, F-550
K8 — 4.88 limited slip, F-550
KW — 4.10 non-limited slip, F-550
 

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factory 4.88s would have been nice in the 250...
 

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fordt said:
but not practical unless you were throwin big tires under it
look who youre talkin to wayne!
 

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Hmm Should we list the people by state or county? But I think we should list them by the type of mods. So anyone with Stacks. Anyone that will argue over Fabtech or Rancho or whatever. and people that are deaf from the woo woo woo sound eminating from there tires.
 

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Dunno about 4.88, but I sure would like 4.30's to get my RPMs up to about 2,000 at 65mph. I would be much happier when towing my 5th wheel then. I don't like to have to run 70mph at 20K GCW going down the road.
 

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Texas XC Quad Racer
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mikeym said:
factory 4.88s would have been nice in the 250...
My thoughts exactly.. :Thumbup: I'm already starting to wonder if 4.56's were the right choice... :smoke:
 

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I did my math wrong... You are right 65 would put me at about 2000 with 4.10 gears. To be perfectly honest I would be happiest towing at about 60 MPH. I'm just not in a big hurry when it comes to towing all that weight. 60 with 4.3 would have me at about 1950 RPMs and 65 would be at about 2100RPMs. Still liveable in my book and would make getting that weight moving a lot easier.
 
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