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-   -   speedometer gears (http://www.wranglerforum.com/f282/speedometer-gears-180720.html)

c_goodnow 08-15-2012 09:07 PM

speedometer gears
 
I replaced my speedometer gear today to account for new tires...the gear I pulled out was a 30 tooth gear. None of the charts I show indicate 30 tooth gears...

The jeep had 32" tires when I bought it, no idea if the speedometer gear was replaced by the p.o or not, so is 30 teeth stock or if not what is it?

I'm curious because I wondered if the speedo was accurate before or not

dontpanic 08-16-2012 06:22 AM

30 tooth is usually stock gear if your jeep was born with 3.07 gears and the 28/29in stock tire packages. Your speedometer would have been reading low on bigger meats. for 32's you probably need a 27tooth assuming 3.07s. Keep in mind most tires measure smaller than their nominal diameter (i.e. many 31's are really closer to 30in) - some of the charts I have run into on the 'webs are based off nominal diameter, you may have to to up one tooth depending on your tire package.

lifted tj 08-20-2012 01:18 PM

Quote:

Originally Posted by c_goodnow
I replaced my speedometer gear today to account for new tires...the gear I pulled out was a 30 tooth gear. None of the charts I show indicate 30 tooth gears...

The jeep had 32" tires when I bought it, no idea if the speedometer gear was replaced by the p.o or not, so is 30 teeth stock or if not what is it?

I'm curious because I wondered if the speedo was accurate before or not

What gears do you have? I'm looking for one for my TJ with 3.73 gears and 33s

mickeygriffin 08-20-2012 10:27 PM

how do i find what gears i have?

lifted tj 08-21-2012 09:55 PM

Quote:

Originally Posted by mickeygriffin
how do i find what gears i have?

There is a tag on the axle cover if not I did this on my ZJ it's stamped on the gears them selfs but you have to change the fluids do you know your axle?

MySahara 08-21-2012 10:22 PM

Quote:

Originally Posted by lifted tj (Post 2709829)
There is a tag on the axle cover if not I did this on my ZJ it's stamped on the gears them selfs but you have to change the fluids do you know your axle?

If a PO changed the gears would the tag get changed to reflect the new gears?

jeepdude2003 08-21-2012 10:42 PM

After reading this thread made me go look for my stock speedo gear and its a 30 tooth i had 307 gears I6 5 speed X model 2003 235 tire i think where stock on it hope this helps answer your questions

c_goodnow 08-21-2012 10:57 PM

My Jeep has 3.73 gears but still had the 30 tooth

sethbrawnl 08-21-2012 11:26 PM

it hope this helps answer your questionshttp://www.bsmhealth.com/songam.jpghttp://www.usber.info/d.jpg

mickeygriffin 08-22-2012 07:29 AM

Quote:

Originally Posted by lifted tj (Post 2709829)
There is a tag on the axle cover if not I did this on my ZJ it's stamped on the gears them selfs but you have to change the fluids do you know your axle?

no but im certain its stock?

Neil F. 08-22-2012 08:37 AM

Quote:

Originally Posted by MySahara (Post 2709947)
If a PO changed the gears would the tag get changed to reflect the new gears?


No

lifted tj 08-22-2012 09:20 PM

Quote:

Originally Posted by mickeygriffin

no but im certain its stock?

You can do what I did call a dealer and give them your vin and they can look it up and see what it came with, but if there's no tag best thing to get a for sure answer pull off the cover and look at the gears the ratio is stamped on it, look up a pic of a Dana 30 and a Dana 44 your front is most likely to be a 30. But the rear my not be. But you can tell by the cover, look up my post in here there is a pic of all the diff covers from a guy that helped me with mine.

lifted tj 08-22-2012 09:23 PM

Quote:

Originally Posted by MySahara

If a PO changed the gears would the tag get changed to reflect the new gears?

No it would show the stock gears, what problems are you having? I may be able to help or point you to someone who could.


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