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Old 10-14-2008, 11:30 PM   #1
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axle gear ratio

can anyone tell me what the axle gear ratio is on a 99 tj sport? i want to chang the gear so the speedometer will be right for my tires but i don't know what the gear ratio is. i have 33x12.50 tires.

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Old 10-15-2008, 06:39 AM   #2
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I will guess you have 3.73's. Also if you have an axle tag on the diff, it might say on there as well.

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Old 10-15-2008, 01:05 PM   #3
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i think you most likely have 3.07 gears. thats what i have in my 98 sahara
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Old 10-15-2008, 01:48 PM   #4
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you need to check how many bolts are on the axle hub and what shape it is.. or you can check the tag on the axel.. year and model doesnt matter because wranglers had the option from the factory to come with diff axle gear ratios
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Old 10-15-2008, 02:36 PM   #5
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Old 10-15-2008, 02:38 PM   #6
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you need to check how many bolts are on the axle hub and what shape it is.. or you can check the tag on the axel.. year and model doesnt matter because wranglers had the option from the factory to come with diff axle gear ratios
Okay clue me in what are the number of bolts on the axle hub and conditon is going to tell you about the gear ratio? TJ's came with 3.07 3.55 and 3.73 w/ the 6cly and 4.10 for the 4 banger as far as I know.
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Old 10-15-2008, 02:50 PM   #7
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The '99 Sport came only with 3.07 or 3.73, Jeep stopped installing 3.55 after '97. Look at the steel tag held between two differential cover bolts at its 9 o'clock position, you'll find the ratio embossed into that tag. Because there is a .01 ratio difference between the front and rear axles with some ratios, it could for example say "3 74" or "3 73" (there is no decimal point when looking at the embossed ratio).
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Old 10-15-2008, 05:01 PM   #8
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Old 10-15-2008, 05:07 PM   #9
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well, i just went out and looked at mine. i have the 3.07. everywhere i have looked online i can't find anything that works with the 3.07 and 33" tires. any suggestions, or does nobody make a gear for that? it seems like it would be pretty common.
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Old 10-15-2008, 05:13 PM   #10
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Old 10-15-2008, 05:16 PM   #11
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that chart says i need the 26 tooth one, however there is not a 26 tooth one that fits mine. they make a 26 tooth one that works for the yj, but the shaft is to long to work for mine.
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Old 10-15-2008, 05:30 PM   #12
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Old 10-15-2008, 05:36 PM   #13
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how do i tell the ratio if the tag is missing? i have a '99 5 speed 4banger, i looked were the picture shows but there is nothing there.
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Old 10-15-2008, 05:38 PM   #14
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i just said i have to have a 26 tooth gear and the link you posted is for a 31 tooth gear. that doesn't really help me.
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Old 10-15-2008, 05:39 PM   #15
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how do i tell the ratio if the tag is missing? i have a '99 5 speed 4banger, i looked were the picture shows but there is nothing there.
You have a 4.10 axle ratio.
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Old 10-15-2008, 06:03 PM   #16
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yehh.. the pumpkin will have a different number of bolts...

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Old 10-15-2008, 07:16 PM   #17
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i just said i have to have a 26 tooth gear and the link you posted is for a 31 tooth gear. that doesn't really help me.
Hmm... so it is. Quadratec has a bad link on their chart page. Oh well.
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Old 10-15-2008, 11:27 PM   #18
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Hmm... so it is. Quadratec has a bad link on their chart page. Oh well.
oh well, thanks for trying.
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Old 10-16-2008, 01:12 AM   #19
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You can try swapping the shafts but i personally had bad experience with it. I think you'll have to warm the gear up a bit to loosen it since its very brittle. Anyhow i remember i hit it and it cracked..

Another person on the jeep forum says he has done it successfully so..

You can also try your dealership.. ask for part 52067626
Also do your self a favor and buy an O ring.

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