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Factory Diff gearing?

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Old Mar 22, 2004 | 03:01 PM
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Factory Diff gearing?

What was the factory differential gearing on a 93 F-350 7.3L IDI?

I looked in the manual, but it doesnt provide info on the diesels, just the 5.0s, 5.4s, and 7.5s, etc.

Edit: forgot its a 10.25" rear and a D60 front. also, I dont know if they changed the Gears for different trannies, but its a ZF-5 speed I think. (If its not its the Mazda something)
 

Last edited by RawPower; Mar 22, 2004 at 03:18 PM.
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Old Mar 22, 2004 | 04:13 PM
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Post the axle code on your door post and someone(like me)can tell you whats in there.
 
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Old Mar 22, 2004 | 05:06 PM
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ether its 3.55,4.10,or 5.13s(If you have 5.13 you will not be able to go 70mphor you will be redlining around there)
 
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Old Mar 23, 2004 | 10:49 AM
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I'm guessing 410.
 
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Old Mar 23, 2004 | 02:47 PM
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I can go 85, and 90 down hill at about 2500 rpm or so, so i couldnt calculate it, cause i didnt know the exact rpms, but its not higher than 4.10s or so... I'm guessing 4.10s though, since thats what the 7.5's had (460s).
 
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Old Mar 23, 2004 | 04:13 PM
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My 92 f350 4x4 has 355s,like i said look at the axle code on the door post.
 
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Old Mar 23, 2004 | 09:57 PM
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85 at 2500? Your higher than 410, must be 355.
 
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Old Mar 23, 2004 | 11:09 PM
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ZF 5 at 2500 RPM and 85.5 MPH = 3.55 Ratio with 235/85-16 tires
 
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Old Mar 25, 2004 | 02:55 PM
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Oh yeah, I have 35x12.50R16.5.
Sorry
 
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