Pros and Cons of re-gearing please...
JK Newbie
Joined: Oct 2007
Posts: 69
Likes: 0
From: Chicago-ish, Illinois
All depends on your setup. If you are running tires bigger than 33" there is no doubt you will NEED to regear. This choice is not taken lightly as the average cost of re-gearing is around $750 an axel (I think), and take some professional know-how.
On your Rubi it comes stock with 4.10 gears which should keep you in good standing for 33" tires. In terms of gas mileage.......It's a JEEP! (But seriously, if you went with 35" tires and did NOT re-gear the gas mileage would suck even MORE because you are overtaxing your engine. Pair the right setup of tires with the right setup of gears).
If this is your daily driver and just want "the look", better seek out more advice elsewhere.
Use the "Search" feature for ALL your needs. Plenty of people have shown what they have done with their setups in other threads
On your Rubi it comes stock with 4.10 gears which should keep you in good standing for 33" tires. In terms of gas mileage.......It's a JEEP! (But seriously, if you went with 35" tires and did NOT re-gear the gas mileage would suck even MORE because you are overtaxing your engine. Pair the right setup of tires with the right setup of gears).
If this is your daily driver and just want "the look", better seek out more advice elsewhere.
Use the "Search" feature for ALL your needs. Plenty of people have shown what they have done with their setups in other threads
JK Enthusiast
Joined: Oct 2007
Posts: 243
Likes: 0
From: SE BC Canada
The JK is available (standard) with 3.21 gears and 32" tires. This gives equal final drive ratios as 3.73's with 36" tires, or 4.10's with 40" tires.
I would expect that larger tires cause other issues in the drive train, but simply from the perspective of engine RPM vs. wheel RPM, there is a lot of latitude.
SV
I would expect that larger tires cause other issues in the drive train, but simply from the perspective of engine RPM vs. wheel RPM, there is a lot of latitude.
SV
JK Newbie
Joined: Nov 2007
Posts: 20
Likes: 0
From: MIAMI, FL
is it worth the cost?
Would it be worth the cost going from 3.21's to 3.73 on 35" tires?
What I do like about the 3.21's is that its has a long first gear (20 - 25 mph).
I use the car daily on a 20 mile round trip in really really bad traffic.
What I do like about the 3.21's is that its has a long first gear (20 - 25 mph).
I use the car daily on a 20 mile round trip in really really bad traffic.
JK Enthusiast
Joined: Jan 2008
Posts: 190
Likes: 0
From: Lufkin, Texas
its a 4X2, i think you would be wasting your money to go with bigger tires or re-gearing -- just enjoy it, spend your money on bolt-ons that you can see and i think you'll be happier -- just my opinion --- or trade it in for a 4WD and get a second on the house and go JEEP CRAZY like the rest of us
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JK Jedi Master
Joined: Oct 2006
Posts: 15,133
Likes: 0
From: O HI 4 Lo
and please dont call a jeep a car...
JK Jedi Master
Joined: Oct 2006
Posts: 15,133
Likes: 0
From: O HI 4 Lo
The JK is available (standard) with 3.21 gears and 32" tires. This gives equal final drive ratios as 3.73's with 36" tires, or 4.10's with 40" tires.
I would expect that larger tires cause other issues in the drive train, but simply from the perspective of engine RPM vs. wheel RPM, there is a lot of latitude.
SV
I would expect that larger tires cause other issues in the drive train, but simply from the perspective of engine RPM vs. wheel RPM, there is a lot of latitude.
SV
i think your way off on your estimates...
I dont think it would move with 4:10's and 40's
JK Freak
Joined: Feb 2007
Posts: 987
Likes: 1
From: Lemoore, CA
based on this gear chart, it is pretty close.
http://www.4lo.com/calc/geartable.htm
32 and 3.21 @65 is about 2200 rpm, 40's and 4.10's is also about 2200. Although, I'm with you on doubting that it probably wouldn't move very well, let alone get up to 65.
http://www.4lo.com/calc/geartable.htm
32 and 3.21 @65 is about 2200 rpm, 40's and 4.10's is also about 2200. Although, I'm with you on doubting that it probably wouldn't move very well, let alone get up to 65.