Gears - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ Tech Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 11-04-2010, 12:41 AM   #1
Jeeper
 
Robinh57's Avatar
 
Join Date: Nov 2010
Location: Longview, TX
Posts: 66
Gears

Ok I have read all about gears and so forth. Just bought mine and it seems pretty powerful. 4.0, manual 5 speed. 33" tires. 5th gear works fine and I can cruise at 65-68 mph no prob. I haven't looked to see what gear it has yet. You look on the rear axle or something right? How would I be able to tell if it has been re-geared?

Robinh57 is offline   Quote Quick Reply
Old 11-04-2010, 12:45 AM   #2
Jeeper
 
Ageless Stranger's Avatar
 
Join Date: Apr 2010
Posts: 26,792
The stock axle ratio is stamped on a tag under a bolt on the diff cover. If it's stock and you're not complaining then it's almost certainly 3.73. (Like mine.) I don't know what to tell you if it has already been re-geared. Contact the previous owners and ask them, I guess.

Ageless Stranger is offline   Quote Quick Reply
Old 11-04-2010, 01:50 AM   #3
Jeeper
 
Indy's Avatar
 
Join Date: Jun 2009
Location: Bay Area
Posts: 554
One way to figure out your ratio is to jack up one of the rear wheels. Rotate the wheel one full turn and at the same time count how many times your driveshaft turns. That's what your gear ratio will be.

For example, if the DS turns 3.73 times (or close to it), then you have 3.73:1 gear ratio.
__________________
98 TJ 4.7 Stroker!!! Unichip tuner, HPD30/D44, 4.56, Detroit Locker in rear axle, 3.25RC SL, 1.25BL, 1MML, 35x12.50x15, Cager Softs 15x8, XRC10 winch, Rancho 9000XL shocks with wireless remote
Indy is offline   Quote Quick Reply
Old 11-04-2010, 03:15 AM   #4
Jeeper
 
Ageless Stranger's Avatar
 
Join Date: Apr 2010
Posts: 26,792
Quote:
Originally Posted by banipal19 View Post
One way to figure out your ratio is to jack up one of the rear wheels. Rotate the wheel one full turn and at the same time count how many times your driveshaft turns. That's what your gear ratio will be.

For example, if the DS turns 3.73 times (or close to it), then you have 3.73:1 gear ratio.
Ageless Stranger is offline   Quote Quick Reply
Old 11-04-2010, 03:54 PM   #5
Jeeper
 
Robinh57's Avatar
 
Join Date: Nov 2010
Location: Longview, TX
Posts: 66
Gears

The differential case with the gear ratio tab had too much rust to see. I need to clean it off. I was in the lot at work, I didn't want to stay under there for ever. I DID however see a couple of 3's. Upon further inspection, out of the differential there is about a 2' long drive shaft going into what looks like a newer gear box. (I say newer because it doesn't show rust like the other parts under there. There is a tab on there saying it is from a company in NY and the ratio is 272. What is this?
Robinh57 is offline   Quote Quick Reply
Old 11-04-2010, 04:01 PM   #6
IITYWTMWYBMAB

WF Supporting Member
::WF Administrator::
 
4Jeepn's Avatar
 
Join Date: Apr 2005
Location: Florence, KY
Posts: 10,218
Images: 5
2.72 is the low range for your transfercase.
__________________
79.96.85.00.01.97.00.97.93.97.95.94
CJ.XJ.CJ. TJ. TJ.ZJ. TJ.TJ. ZJ.ZJ.YJ. XJ
4Jeepn is offline   Quote Quick Reply
Old 11-04-2010, 04:03 PM   #7
Jeeper
 
KeeblerKO's Avatar
 
Join Date: Sep 2010
Location: Evansville
Posts: 314
You gear ration on the axle tag will be at one end or the other more or less by itself and will not have the decimal in it, its usually close to a corner of the tag. You can check either axle.


You say you can cruise in 5th gear, but can you pass other cars quickly in 5th or go up even moderate inclines without having to shift to 4th? If the answer is no you've probably got 3.73 gears. With 3.73 and 33s I could cruise at highway speed just fine in 5th once 4th got me where I wanted, but passing other vehicles or going up even a slight incline for more than 50 feet traveling distance and I was shifting to 4th. Building speed up in 5th gear also took a good while.

For reference now that I have 4.56 gears I have 5th gear back and I pretty much have to use it, where-as before 5th was a cruising option only for lower RPMs.

If you're somewhere between those extremes you may have 4.10 gears.
KeeblerKO is offline   Quote Quick Reply
Old 11-04-2010, 04:36 PM   #8
Jeeper
 
Robinh57's Avatar
 
Join Date: Nov 2010
Location: Longview, TX
Posts: 66
It is like you said....I must downshift to 4th to increase speed to pass. How tough is it to regear to 4.56? Price? I love the size and would love a little more gittyup.
Robinh57 is offline   Quote Quick Reply
Old 11-04-2010, 05:00 PM   #9
Jeeper
 
530ktm's Avatar
 
Join Date: May 2010
Location: Southern California
Posts: 3,738
Images: 3
It is best to let the pros do the re gearing and it usually is around $1200 for both axles out the door.
530ktm is offline   Quote Quick Reply
Old 11-12-2010, 02:01 AM   #10
Jeeper
 
Robinh57's Avatar
 
Join Date: Nov 2010
Location: Longview, TX
Posts: 66
Well, I think my gear plate reads 3.07. Is that bad? Does this mean I will stall during climbs?
Robinh57 is offline   Quote Quick Reply
Old 11-12-2010, 09:13 AM   #11
Jeeper
 
UnlimitedLJ04's Avatar
 
Join Date: Aug 2010
Posts: 7,540
Quote:
Originally Posted by Robinh57 View Post
Well, I think my gear plate reads 3.07. Is that bad? Does this mean I will stall during climbs?
yea 3.07s are the worst. if you think its powerful now, and that 5th works, you should install 4.56s. make sure to come back and say how wrong you were previously
UnlimitedLJ04 is offline   Quote Quick Reply
Old 11-12-2010, 10:59 AM   #12
AOR
Sponsoring Vendor

WF Supporting Member
 
AOR's Avatar
 
Join Date: Sep 2010
Location: Mount Aukum, CA - El Dorado County about 55 mins from the Rubicon Trail
Posts: 2,084
First off! Bummer on the 3.07s. Secondly, before you re-gear, where do you see your rig in a years time? I mean are you going to lift it more, go bigger tires, etc. The reason I ask is, that if you plan to build this any more, then you should re-gear to where you want to be when done with the build. Also, when re-gearing, if you plan on wheeling anything difficult, now would be the time to consider some type of TAD (traction adding device) i.e. locker or automatic soft locker, such as an Aussie, Lock-Right, Spartan etc.

Gears, install kits, and labor will vary in different parts of the country and by the shops available in your area. If you do want to add a TAD, then you also have to consider your driving habits, (% off and on road), weather in your area, what you will tolerate as far as handling characteristics on the street, and the fact that you SHOULD upgrade axle shafts etc to handle the extra load on your rig.

If you don't plan on any future build up of your ride, then re-gear to 4.56s as described and enjoy the renewal of power and most likely better mileage. Then if you do go to 35' tires in the future, you will still be ok, as far as performance goes.

Your profile doesn't say anything about your rig specs, so either they rebuilt the t/case or the previous owner installed a SYE kit and CV shaft. Do you have a CV style driveshaft?

If you want more info about gears and install kits PM me. Have fun and enjoy the process.

Allen
__________________
Allen's Offroad - 530-620-1100
Email me at: sales@allensoffroad.com


Rock Kralwer Suspension Deals -- Suspension Deals Winch Deals -- LED Light Bars
AOR is offline   Quote Quick Reply
Old 11-12-2010, 11:15 AM   #13
Jeeper
 
Indy's Avatar
 
Join Date: Jun 2009
Location: Bay Area
Posts: 554
Quote:
Originally Posted by Robinh57
Well, I think my gear plate reads 3.07. Is that bad? Does this mean I will stall during climbs?
What if the previous owner already regeared it? Double check it by the method I posted above. It will take you just 10 minutes to figure it out.
__________________
98 TJ 4.7 Stroker!!! Unichip tuner, HPD30/D44, 4.56, Detroit Locker in rear axle, 3.25RC SL, 1.25BL, 1MML, 35x12.50x15, Cager Softs 15x8, XRC10 winch, Rancho 9000XL shocks with wireless remote
Indy is offline   Quote Quick Reply
Old 11-12-2010, 02:15 PM   #14
Jeeper
 
Robinh57's Avatar
 
Join Date: Nov 2010
Location: Longview, TX
Posts: 66
All good info...

To be honest, I probably will have done nothing to the jeep in a year. I will drive it back and forth to work, take the top off when it gets warmer, mayby put it in 4WD to go through some mud or up some trails...MAYBE. No rock climbing, bigger tires, higher lift, or anything like that. I will be replacing parts though because of some rust. Will probably have to start with brake components and work inward, to shocks, springs, then maybe to axles, shafts, diff's, etc. That's when I would get into regearing, I guess. I will wait to do any serious off roading until then......In thinking that I have a powerful jeep, I have driven 2 in my life...an 03 tj with a 4-cyl and this one. In my other jeep it took me 11 hours to go from Muskogee, OK to San Angelo, TX. normally a 7-8 hour trip. Max speed of 45mph into a typical central OK/ west texas headwind of about 30mph. That was NOT a powerful jeep. I traded it in 2 weeks later, and have missed it until I got this one. Even though I have the worst jeep gears ever, I am still happier than the normal person driving a regular car with great gears.....

Robinh57 is offline   Quote Quick Reply
Reply

Quick Reply
Message:
Options

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:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

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.



Thread Tools

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Changing Diff Gears USBrit TJ General Discussion Forum 11 09-21-2011 11:17 AM
Why 4.56 or 4.88 gears? up2nogood TJ General Discussion Forum 10 08-11-2010 01:49 PM
USA gears and noise? scopop JK Tech Forum 11 01-06-2010 12:41 PM
D35 and gears or upgrade. Urgent help please fliggyg TJ Tech Forum 9 11-10-2009 06:04 PM
Gears Gears Gears Help Jeepluv07 JK Tech Forum 3 04-27-2007 03:37 PM



Download our Mobile App

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 08:51 AM.



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