Need tooth count for speedo gear

[fletchstj]

I am trying to get my speedometer correct with the larger tires. I have determined that my gear ratio is a 2.35 and my tires are 33" but can't find a chart that give me those combinations. Is there anyone out there that has any idea on where I could look or what the tooth count might be?

 

[Jerry Bransford]

No Wrangler ever came with a 2.35 axle ratio. There should be a steel ratio tag bolted to the differential cover at the 9 o'clock position with the ratio embossed into it. Likely 4.10 with your 2.5 engine.

And welcome to the forum!

 

[Wheelie]

Sounds like you’re probably going to need a 34 tooth gear, . Which seems to be common for a 33 inch tires and a 4.10 gear...since most 33" tires are closer to 32" in reality ....

. Let me know if that’s what you come up with I think I have a new one here

 

[fletchstj]

So I looked at the axle and there is no tag, but it is a Dana and the number on it was 46587 AY

 

[Alex01]

So I looked at the axle and there is no tag, but it is a Dana and the number on it was 46587 AY

Unless you have reasons to believe your jeep has been regeared plug your vin into this website.

https://fcacommunity.force.com/RAM/s/equipment-listing
It will tell you the build sheet for your jeep.

 

[Wheelie]

may have to jack up a rear wheel and do the turn and count test ..... mark the tire at the top center , and mark the driveshaft facing you ... rotate the tire 1 full turn while counting the rotations of the driveshaft ....the driveshaft should turn approx 4 turns with a 4.10 ratio gear ——- 3 3/4 times with a 3.73 and so on ...

 

[Jerry Bransford]

So I looked at the axle and there is no tag, but it is a Dana and the number on it was 46587 AY

Did you look at both axles? 4.10/4.11 is what is normally installed with a 5-speed transmission.