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Old 04-22-2008, 02:40 PM   #1
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Speedometer gear Question

I bought my Jeep with 31's already on it..

I'm off by about 6 mph (under) on my speedo according to my GPS.. How do I know what gear to go up/down to to get it back to normal??

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Old 04-22-2008, 02:55 PM   #2
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what gear ratio do you have?

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Old 04-22-2008, 07:24 PM   #3
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How do I know??? Thats what I need to find out

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Originally Posted by black71gp View Post
what gear ratio do you have?
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Old 04-22-2008, 07:27 PM   #4
Knows a couple things...

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Your axle ratio is embossed into a steel tag held by two bolts at the 9 o'clock position on your differential cover. You'll need a rag to wipe it off so you can read it plus a flashlight. It'll say something like "3 07" or "3 73" or similar.
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Old 04-23-2008, 03:19 PM   #5
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Jerry, thank you so much for the info..!!!


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Originally Posted by Jerry Bransford View Post
Your axle ratio is embossed into a steel tag held by two bolts at the 9 o'clock position on your differential cover. You'll need a rag to wipe it off so you can read it plus a flashlight. It'll say something like "3 07" or "3 73" or similar.
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