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How to find rear end gear ratios???

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Old Dec 10, 2008
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RamgermasterKC's Avatar
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How to find rear end gear ratios???
I have 1999 ford ranger sport and i was wondering how i would find the rear end gear ratio with out opening up my rear end?
 
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Old Dec 10, 2008
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Should be a tag on the axle
 
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Old Dec 10, 2008
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Also check the driver's side door jam for the axle code.
 
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Old Dec 10, 2008
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Originally Posted by OTRtech
Also check the driver's side door jam for the axle code.
This

and then look here

http://www.therangerstation.com/tech_library/Axles.html
 
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Old Dec 10, 2008
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Or you could just look here:

Name: 1120081854.jpg Views: 14941 Size: 59.5 KB
 
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Old Dec 10, 2008
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^^ damn you beat me to it you keep doing it lol
 
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Old Dec 11, 2008
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kool thank everyone
 
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Old Dec 11, 2008
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What if your door jam sticker ain't there?? Mine was scratched off when I got the truck.. Don't know why, it's caused me a pain in the @$$.
 
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Old Dec 11, 2008
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Theres a tag on your diff, I'll grab a pic of how to decode it later. I'll shoot you a PM about it
 
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Old Dec 11, 2008
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or you can jack the rear up, turn the tire one full turn and count the revs of the drive shaft. It'll give a close-enough measurement to assume a stock gear ratio.
 
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Old Dec 11, 2008
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Where on the diff would the tag be located? (pic?) Hopefully it didn't get removed either...
 
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Old Dec 11, 2008
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It will be attached to one of the bolts
 
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Old Dec 11, 2008
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a bolt on the diff cover. can't miss it.
 
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