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Discussion Starter #1
So I'm trying to figure out how to know what the gear ratio is on my 07 2-dr 6 sp manual Sahara is. I think I may have the tow package option because it has the 2 hooks coming up from the top of the bumper. In which case, would that mean it automatically has the 3.73 gearing?

Here's some pics:








(this pic's from before the new tires)

I'm a new Jeep owner and, as embarrassed as I may be about it now, I didn't know enough at the time to ask the dealer these questions - and I don't remember what the sticker said about the gearing if anything at all...

What's a sure way to find out? Sorry for the dumb question.

Thanks!
 

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the tow package useually means that you have a reciever in the back to tow a trailer, in wich case for 07 i belive it would have 4.10 but you dont have a tow package you have the tow hooks which i belive have no bearing on what gears you have, so all i can say is you prob dont have 4.10's, which would prob mean you have 3.73's
 

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I think you have the 373's... with the tow option it gave you 410's
 

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Gears

So I'm trying to figure out how to know what the gear ratio is on my 07 2-dr 6 sp manual Sahara is. I think I may have the tow package option because it has the 2 hooks coming up from the top of the bumper. In which case, would that mean it automatically has the 3.73 gearing?

Here's some pics:








(this pic's from before the new tires)

I'm a new Jeep owner and, as embarrassed as I may be about it now, I didn't know enough at the time to ask the dealer these questions - and I don't remember what the sticker said about the gearing if anything at all...

What's a sure way to find out? Sorry for the dumb question.

Thanks!
There is a website you can plug your vin in and they will email you all the particulars for your Jeep. I got to look it up but give me a few....If U bought it used it could have been ordered with something outside the norm for the original buyer-

Just say you want the build sheet-Took less than a day to get mine!


http://www.jeep.com/wccsapp/universal/J/index.jsp?appStr=wccs&titleStr=Contact+Jeep&familyStr=brand&franchise=J&actionURL=/wccs/brand_forms/us/webform.jsp&promotion=null&category=U
 

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I will show you the window sticker that was the gear in my jeep
Misprints happen.

Take a pic of the ring & pinion so we can count the teeth. Then I'll believe there was such a beast. I find it very difficult to believe that one 3.07 gear ratio snuck out of the line when it wasn't even an option. :)
 

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I built my jeep it had 3.07 gear from the factory you guy need to do some more homework I also have a freind with the same gear in his 08 x 2dr with the 6sp also
 

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Sent this question in to the "Contact Us" link on Jeep.com...
Comments:
Has there ever been a 3.07:1 ratio available from the factory on the JK
Wrangler ('07-'10)? Thank you.
... and got this response...

Dear (jeeperjkj):

Thank you for contacting the Jeep Customer Assistance Center in regards
to axle ratio on the Jeep.

There is no 3.07:1 factory ratio on the Jeep Wrangler 2007-2010


Thanks again for your email.

Sincerely,

Marc

Customer Service Representative
Jeep Customer Assistance Center
Not that I needed to ask, but I figured it'd be valuable in this conversation.

Are you sure you're not building a TJ/LJ? :thefinger::shaking:
 

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Back on topic, dkrz123, you definitely don't have the tow package. If you did, you would have a receiver hitch instead of the rear tow hook.

So, the question becomes, what is the factory gear ratio for a 2007 Sahara without the tow package?
 

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my '07 Sahara came with 4.10s maybe you will be as lucky as i was? mine has the 6 speed
 

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Discussion Starter #16 (Edited)
Ok, I just got back from doing a test. I used this gear ratio chart as my guide:

So now I'm more confused than ever... I just put BFG"s on yesterday, size is 275/70 R18 (33.16").

I did this test at 70mph (according to the chart that is the range)

I tried 4th, 5th and 6th gears @ 70mph because I was not sure which gear I should be testing in. I thought I read somewhere that 4th gear will give me the 1:1 ratio I'm looking for :confused:

6 speed manual:

4th gear @ 70mph = 3900
5th gear @ 70mph = 3100
6th gear @ 70mph = 2600



3900 (in 4th gear) is off the chart !! :shocked:

Can anyone help clearify? Thanks!!
 

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If you have an 07 without tow package (you do) then you have 3.21 gears....
East way to check is the vin thing,
you can also jack up the rear , put a mark on your tire (chalk) and and turn the driveshaft and see how your wheels react. A little math and you can easily figure it out.
 

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Discussion Starter #19
Nope, 5th is 1:1.

4th is like 1.25:1.

Looks like you might have 4.88's.

Maybe those were an option in '07 that we didn't know about, too! :)
Hmm, interesting. I always seem to be out of gears by the time I hit around 50. I blow right through 1rst to 3rd in a few seconds...

According to that chart, is it possible that I might even be at 5.13 ? That's just crazy...
 

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Discussion Starter #20
If you have an 07 without tow package (you do) then you have 3.21 gears....
East way to check is the vin thing,
you can also jack up the rear , put a mark on your tire (chalk) and and turn the driveshaft and see how your wheels react. A little math and you can easily figure it out.
So it's not possible that the previous owner had the thing regeared or maybe as a factory option? Those are the numbers I got. Did you see my test results? What does it mean - thanks...
 
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