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Old 08-23-2009, 12:13 PM   #1
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Rear Differential Tag Decoding Help

I have an 04 Wrangler with the 4.0L 6cyl and automatic trans. I have searched here and found enough information to be able to find what I was looking for ( thanks to all ) but now I need help decoding the information found on the ID tag located on the rear differential, primarily I'm looking to confirm my ring & pinion gear info. the tag reads as follows:
52111763AF
3 73 606854 4

It's a Dana 35 rear axle, and I believe they are 3:73 gears but I'd like some confirmation on that. That way when I install 31" tires I'll know what speedometer gear I need to put in as well. Thanks for any help!

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Old 08-23-2009, 01:09 PM   #2
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3 73 yep

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Old 08-30-2009, 08:50 PM   #3
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I'm a little late with this but Thanks !!!!
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Old 08-30-2009, 11:14 PM   #4
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Hey not to jack your thread man but I got a 05 sport with a dana 44 do I have 3.07? The tag is not there....
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Old 08-31-2009, 06:44 PM   #5
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you're not hijacking anything .... just looking for some help like I was .... so have at it brotha !!
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Old 08-31-2009, 07:51 PM   #6
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Hey not to jack your thread man but I got a 05 sport with a dana 44 do I have 3.07? The tag is not there....
It's safe to say even without the tag data that you have 3.73. Dana 44 axles in the Sport/Sahara TJ all came with 3.73 gearing.
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Old 09-02-2009, 12:57 AM   #7
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Ok thanks bro, Ya The thing is since its a 6 speed I heard that it comes with 3.07sfor the 05 model . But I have no clue personally lol. I have 33's and on the low side it seems like the engine has to work alot harder to get her going. Not crazy hard but I just cant accelerate as quick. Wish I had that tag so I could find out for sure. Guess its time to do some research!
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Old 09-02-2009, 07:30 AM   #8
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Ok thanks bro, Ya The thing is since its a 6 speed I heard that it comes with 3.07sfor the 05 model . But I have no clue personally lol. I have 33's and on the low side it seems like the engine has to work alot harder to get her going. Not crazy hard but I just cant accelerate as quick. Wish I had that tag so I could find out for sure. Guess its time to do some research!
You could do the ol' jack it up and spin the tire and count the drive shaft rotations.

OR...go to the closest Jeep/dodge/chysler dealer and have the parts counter guy ""or girl print off a copy of your build sheet. Just give them your VIN number.
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Old 09-02-2009, 07:58 AM   #9
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If im not mistaken, I believe there was a thread on here awhile back that gave an e-mail, so one could get the build sheet for there jeep. Ya just needed the vin #. Try looking back three months ago.
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Old 09-02-2009, 10:12 AM   #10
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If im not mistaken, I believe there was a thread on here awhile back that gave an e-mail, so one could get the build sheet for there jeep. Ya just needed the vin #. Try looking back three months ago.
Jeep.com Just go to the jeep owners link. But it only works for 04 and up now.
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Old 09-02-2009, 10:52 AM   #11
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I have been trying to find mine but have been unable to. I have a 2004 X 6 cylinder 5 speed. anybody know if my gearing will support 33's or will it be too sluggish?
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Old 09-02-2009, 11:20 AM   #12
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I have been trying to find mine but have been unable to. I have a 2004 X 6 cylinder 5 speed. anybody know if my gearing will support 33's or will it be too sluggish?
Unless someone removed the tag, your ratio is embossed into the tag at the 9 o'clock position on the differential cover. But even with the best possible factory ratio of 3.73, your Jeep would be sluggish after installing 33" tires. 33" tires really require a much lower ratio with 4.56 being pretty ideal.
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Old 09-02-2009, 12:00 PM   #13
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Jeep.com Just go to the jeep owners link. But it only works for 04 and up now.
When did that change? Glad I did mine when I did. I have an 00.
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Old 09-02-2009, 01:57 PM   #14
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But even with the best possible factory ratio of 3.73, your Jeep would be sluggish after installing 33" tires. 33" tires really require a much lower ratio with 4.56 being pretty ideal.
Wow, good info. makes me think my 31's are just fine. It really is a slippery slope once you start modding.

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