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Member
Posts: 24
Location: Ohio | How do you figure the axle ratio? I'm looking in my owners manual for towing info and have looked at the tag on the drivers side door frame. Nothing stnads out. I have a f-150, 4x4, w/ tow and off road package. Thanks. |
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Expert
Posts: 1205
 
Location: Arkansas | Crawl under there and look on the rear housing, often it is on a tag there. Also, call a dealer, give them the VIN #, and see if they get it for you. |
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Expert
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Location: western PA | You can also do it mechanically by jacking the vehicle and comparing the rotation of the drive shaft to the rotation of the tire. It's more difficult to do with a posi unit. The tag is the easiest way, Gard |
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Expert
Posts: 1416
Location: sc | Should be a 3 digit code on or around the door post, probably will say axle code. Google said code.
Edited by chadsalt 2008-10-02 10:27 PM
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Expert
Posts: 1351
Location: Decatur, Texas | Check the above like everyone said, the sticker on the door will have a code then call your local Ford dealer and he can tell you for sure. Depending on year model, 96 and older F-150's that are 4x4 with the 5.8L engine and automatic transmission is going to be a 3.55 ratio, if it has a 5.0 engine and automatic it could have 3.08's. 97 and newer 4x4's most had the 3.55 with a 4.6 or 5.4 engine, there is a few that have a higher gear such as I think a 3.08?? that is great for fuel mileage, but POOR for any type of towing! |
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 Expert
Posts: 1391
Location: North of Detroit, MI | What year is the F150? Here's the link to a REALLY great spot... http://www.ford-trucks.com/forums/index.php?s=
Edited by gabz 2008-10-03 11:52 AM
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How do you figure axle ratio?
