how do i tell what gear ratio i have
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Searching "axle codes" returned about a million posts, more or less. Try this one
https://www.f150online.com/forums/sh...ght=axle+codes
https://www.f150online.com/forums/sh...ght=axle+codes
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Joined: Nov 2006
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From: Jacksonville, FL
Just because you have an open rearend does not mean that only one tire is powered at a time. It is entirely possible to spin them both as long as they are on the same type of surface and have the same amount of traction.
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Joined: Dec 2006
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From: Joplin MO
You have to put it in neutral and jack up one rear wheel. If you can turn it easily and the driveshaft rotates, you don't have limited slip.
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From: Memphis, TN 38135, USA, Earth
Originally Posted by glc
If you can turn it easily and the driveshaft rotates, you don't have limited slip.
Originally Posted by Steve83
The first digit tells the chassis weight & type of diff; the 2nd tells the ratio; if there's a 3rd digit (4WD only), it means the front diff is limited slip. In the first digit, 1 is the code for most 1/2-ton open diffs; 2 can be 1/2- or 3/4-ton open; H is a 1/2-ton limited slip. (Any letter in the first digit means L/S.) In the 2nd digit, 2 = 2.73; 3 = 5.13; 4 = 3.54; 5 = 4.10; 6 = 3.73; 7 = 3.31; 8 = 3.08 (or sometimes 4.88); 9 = 3.55.
