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-   -   Speedometer gear confusion (http://www.wranglerforum.com/f210/speedometer-gear-confusion-18918.html)

Triple88a 05-31-2008 01:16 PM

Speedometer gear confusion
 
So i'm looking to buy a speedometer gear. Well there are couple of charts i've seen. I have 3.73 gears and 35s. Some charts say i need 29 tooth gear others say i need 31 tooth gear. What is right?

http://4x4xplor.com/speedo.html
http://4x4xplor.com/images/speedo/speedochart00.gif


In 4wheel drives catalog (www.4wd.com) it says i need 31 tooth gear.
I just called qtec (yes i know lol) and on their website it says i need 29 tooth gear while when i called, the guy says i need 31 tooth gear. WTF is going on here?
http://www.quadratec.com/jeep_knowle...article-46.htm

Thanks

distortedtj 05-31-2008 01:21 PM

what does your tire measure in diameter?... im betting its about 33''

MR.CLIFFORD 05-31-2008 01:21 PM

I have had decent success with this chart.

http://www.raingler.com/jeepReference/speedoChart.html

Says you need a 29. Do you know the exact height of your tire? Just cause they say 35 doesn't mean they are 35.

distortedtj 05-31-2008 01:25 PM

for a 33'' diameter you need a 31 tooth with 3.73's
for a 34.5 to 35.2 diameter you need a 29 tooth with 3.73's

and before you get mad and stores and sales places....the 31 tooth speedo gear is on national back order since January:(

:wavey:

Triple88a 05-31-2008 01:40 PM

my tires measure a bit over 34". I'm thinking a 30 tooth gear should be perfect for 34" tires?

I just ordered a 30 tooth gear from qtec and they say
Quote:

i should receive it in 3-5 business days.

distortedtj 05-31-2008 01:45 PM

good luck

Triple88a 05-31-2008 01:48 PM

LoL with my experience with qtec i will receive it for Christmas. I'm not taking the risk to order something big from them however this is 20 bucks. I can deal with that.

MR.CLIFFORD 05-31-2008 02:14 PM

I get speedo gears from the dealership for 8 bucks. Usually have them the next day.

Triple88a 05-31-2008 02:32 PM

my dealer ship doesnt have any of them in stock and they are 25 bucks + tax

juspimpin 05-31-2008 09:27 PM

I waited 2 months for my 30T gear from Jeep. $22. I too split the diff as I would rather be putting less miles than actual as opposed to putting more miles on than I travel. I have not checked it with a GPS yet, but I think it is close enough.

As you, I have 35s and 3.73. Switching the gear makes it feel much faster as the speedo moves quicker.

Triple88a 06-01-2008 08:15 PM

lol, Juspinpin, honestly i have an idea however i wanna see if i'm gonna get the right mpg as what i calculated i would.

MR.CLIFFORD 06-01-2008 08:33 PM

it is eating you up inside isn't it?

Triple88a 06-01-2008 08:44 PM

yes Mr C it is lol :D I still do not understand why i would get something other than what i calculated because its all about a ratio of old tire circumference to the new tire circumference or the ratio of the old gear teeth to the ratio of the new gear teeth. Now it should be different because its 30 tooth instead of 29 however it still shouldnt be that much off.

MOz 06-02-2008 06:54 AM

Life is not always perfect and predictable.

Don't sweat the small stuff, concentrate on what matters.... Like gas prices.

Steelman 06-02-2008 06:22 PM

I have a 29 tooth gear sitting in my garage if you want it. :D
Drop me a PM if you are interested.

Triple88a 06-04-2008 02:54 PM

I just received my 30 tooth gear. Steelman i wish i knew i would have bought it from you.

Jerry Bransford 06-04-2008 03:15 PM

Quote:

Originally Posted by Triple88a (Post 234738)
I just received my 30 tooth gear. Steelman i wish i knew i would have bought it from you.

You still can, the benefit with Bob's being you'd have an accurate speedometer with his 29 tooth gear. :p

Triple88a 06-04-2008 03:17 PM

Yes but i already have one 30 tooth at home. Dont feel like spending more...

Steelman 06-04-2008 03:38 PM

Quote:

Originally Posted by Triple88a (Post 234748)
Yes but i already have one 30 tooth at home. Dont feel like spending more...

check your PM's...

Jerry Bransford 06-04-2008 03:48 PM

Bob you need to get at least $50 for that rare 29 tooth gear, you're not just gonna give it to him are ya? :D

Steelman 06-04-2008 04:04 PM

Quote:

Originally Posted by Jerry Bransford (Post 234766)
Bob you need to get at least $50 for that rare 29 tooth gear, you're not just gonna give it to him are ya? :D

He's agreed to pay $75, which will cover shipping!

Jerry Bransford 06-04-2008 04:16 PM

Nah I call BS on the $75, you're giving it him like the good guy I know you to be, aren'tcha.

Steelman 06-04-2008 04:17 PM

;)

slf41002 06-04-2008 04:37 PM

Hey BOb if Trip don't take the gear let me know.I don't know about the $75 buuuttt I would buy it:D Unless $75 is what you really want:doh:Then I don't really need one that bad;) J/K I really do need one but mine has to be fabed26 tooth but 29 would be better than I got now.

spanky 06-05-2008 12:51 AM

trip: get that installed, and go drive around aimlessly.. i wanna know the outcome!

Triple88a 06-05-2008 01:18 PM

Sherman since i'm getting the 29 tooth, you want my 30 tooth?

Spanky today my fuel light went on again. I had 242 miles on the odometer with the stock gear.

spanky 06-06-2008 12:25 AM

Quote:

Originally Posted by Triple88a (Post 235100)
Spanky today my fuel light went on again. I had 242 miles on the odometer with the stock gear.

242 miles before
ok now get that new gear in and kill a tank of gas! inquiring minds want to know!

Triple88a 06-06-2008 12:29 AM

lol i donno man, i've got so many mods on the list. I think i might do the gear last. I have my radiator electric fan, i wanna add a hydrogen cell, i wanna try my bumper, and at last the gear.. just adds up lol.. if i do the gear then my "base" or current mpg might be off.

I ran it up to 248.7 miles and filled up 16.505 gallons of gas.

spanky 06-06-2008 12:49 AM

a electric fan is on my list somewhere.. i think theyre pretty cool.. haha get it ?

Triple88a 06-06-2008 01:11 AM

lol we'll see how cool my pro comp will be lol


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