Jeep Wrangler Forum - Reply to Topic
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > JK Jeep Wrangler Forum > JK Tech Forum > Possibly going to pickup a JK, axle ratio question

Join Wrangler Forum Today

Thread: Possibly going to pickup a JK, axle ratio question Reply to Thread
Post Icons
You may choose an icon for your message from the following list:

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Additional Options
Miscellaneous Options

Topic Review (Newest First)
02-03-2009 10:36 AM
ixxi Ok so I will have to go with the 3.73's to start than eventually upgrade if i end up upgrading everything else =P

There really isnt anything too hardcore around here in Rhode Island that i have found or want to attempt. The jeep will be my daily driver so going to stay away from anything too big for me. I''l keep posting as i get more info or questions =D Thanks for the info guys

Found a pic of my old 98 =D

& Hill that squirrel sig is amazing
02-03-2009 09:14 AM
Hilldweller I'd get the 3.21's because if you ever think you'll lift, get better rubber, or otherwise actually use your Jeep, you'll want at least 4.10's.
IMHO with an autotrans:
4.10 okay for 32" tires but not great.
4.56 for 33" tires
4.88 or 5.13 for 35" tires.

Unless you keep the small tires and never see a hill, I can't see how anybody would be happy with 3.21 or 3.73.....
02-03-2009 12:43 AM
AzTJ With any Jeep, lower gears will help, especially when you decide to put some larger tires on it.

Go with the 3.73's.
02-03-2009 12:06 AM
OffTheGrid I have a Rubicon with 4.10s and I don't think it revs too high on the highway, but for me 70mph is probably about as fast as I'll ever go. I don't use it as a daily driver so fuel economy on the highway isn't a big factor for me, it's more about fun and how it performs off-road. I suppose also automatic vs manual might have a bearing on your choice as well. Do you plan to lift it and run bigger tires? If you do will you re-gear? I suppose your choice of 3.21 vs 3.73 depends on what you want to use it for most of the time but I would probably choose 3.73 over 3.21.
02-02-2009 08:56 PM
Possibly going to pickup a JK, axle ratio question

So I'm looking into a new JK Sahara that is at my local dealership. The onle question i have is about the gears. I was looking on the website and was under the Build My Own area and saw 2 different axle ratios.

3.21 Axle Ratio & 3.73 Axle Ratio

When i click the tooltip it explains that one gives better gas milage and a lower RPM while the other improves acceleration, climbing grades, & carrying loads.

If i got the higher axle ratio will it hurt my highway RPMs that bad or is it nothing to really be worried over.

I used to have a 98 Wrangler SE that i just did some smaller things to when i was 18. At the moment i have a 93 6cyl which is a rust bucket. that i think of it should i wait till they have a "SUNDAY SUNDAY SUNDAY Push, Pull, Tow. at least $3000 on any trade in!!!!" deal and trade in my 93 that sits in my garage mostly due to leaks that shorts my radio? Never been too handy =( my mind is working overtime and it hurts

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

All times are GMT -5. The time now is 11:09 PM.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC. is not in any way associated with the Chrysler Motors LLC