which gears would be best??? - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ General Discussion Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 04-15-2011, 11:37 AM   #1
Jeeper
 
Join Date: Jan 2011
Location: puyallup wa
Posts: 16
which gears would be best???

I am wanting to upgrade gears on my 06 jeep tj 2.4L I4 6 speed manuel. It has 3.73 gears and 33x12.50 on it now but i want to go up to a 35 or 37in tire which gears would be better in it 5.13's or 4.88's? But I still want to get good fuel economy but yet still get horsepower and torque when i am hitting the trails??? any ideas it would help me out alot.

doublenasty is offline   Quote Quick Reply
Old 04-15-2011, 11:41 AM   #2
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 30,867
Images: 2
Your '06 TJ's rear Dana 35 is not strong enough for a 35", and especially not for a 37" where the front axle is not strong enough either. Plus you can't regear your axles low enough for even 35" since 35" tires with the 2.4L engine require 5.13 or 5.38 and the lowest your axles can be regeared to is 4.88.

I'd regear to 4.88 and stick with nothing bigger than 33" which is all a stock rear Dana 35 can handle.

__________________
When you have a choice, buy American.

Jerry Bransford is offline   Quote Quick Reply
Old 04-15-2011, 11:45 AM   #3
Jeeper
 
Join Date: Jan 2011
Location: puyallup wa
Posts: 16
i am upgrading to a dana 44 front and rear axle and just trying to find out which gears would be best for me to run with 35's or 37's
doublenasty is offline   Quote Quick Reply
Old 04-15-2011, 11:50 AM   #4
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 30,867
Images: 2
Since you have the 2.4L engine and 6-speed transmission which is geared lower than the usual 5-speed, I'd go 4.88 and 5.13 respectively for 35" and 37" tires. What type of front Dana 44 are you installing? One out of a Rubicon?
__________________
When you have a choice, buy American.

Jerry Bransford is offline   Quote Quick Reply
Old 04-15-2011, 11:39 PM   #5
Jeeper
 
Join Date: Mar 2011
Location: Las Vegas
Posts: 113
I was just told today at 4 wheel parts today that I need 4.56 gears in my 97 4.0 auto running 33s is that right?
__________________
I already asked your wife and she said it was OK!
Ratdaddy is offline   Quote Quick Reply
Old 04-16-2011, 08:34 AM   #6
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 30,867
Images: 2
Quote:
Originally Posted by Ratdaddy View Post
I was just told today at 4 wheel parts today that I need 4.56 gears in my 97 4.0 auto running 33s is that right?
Unless your rig is a pure offroad machine, your particular combination needs 4.10 for 33" tires. 4WP isn't taking into account that your automatic only has three gears and no overdrive. 4.56 is appropriate for the 4.0L running 33" tires only with the 5-speed manual transmission that has an overdrive. Unless you will soon be running 35" tires where 4.56 would be a great choice, don't let them talk you into 4.56 for your 33" tires which would cause excessively high highway rpms.
__________________
When you have a choice, buy American.

Jerry Bransford is offline   Quote Quick Reply
Old 04-16-2011, 10:32 AM   #7
Jeeper
 
OKLAHOMA_TJ's Avatar
 
Join Date: Dec 2010
Location: oklahoma
Posts: 246
I. Have been looking for this info. I gave a 97 sahara i6 auto with 3.07.

4wd told me 4.56 also. Thx.
OKLAHOMA_TJ is offline   Quote Quick Reply
Old 04-16-2011, 10:43 AM   #8
Upside-down Disorder
 
InvertChaos's Avatar
 
Join Date: Sep 2010
Location: NoVa
Posts: 7,879
I would get 4.11 if I were you. Jerry knows his stuff.
__________________
|2004 Jeep TJ "Green Machine"|4.0L 5 speed Dana44|33x12.50x15 Goodyear Duratracs|2.5" RC coils + 1.25" body lift|OME NitroSport shocks|4.56 gears|Skid Row Engine Skid|BCC Sliders|Currie AntiRock|
InvertChaos is offline   Quote Quick Reply
Old 04-16-2011, 10:52 AM   #9
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 30,867
Images: 2
Quote:
Originally Posted by OKLAHOMA_TJ View Post
I. Have been looking for this info. I gave a 97 sahara i6 auto with 3.07.

4wd told me 4.56 also. Thx.
4WP now owns 4WD and I was shocked at some of the recommendations the young counter sales guys gave out when I was with 4WP's parent company years ago. They receive no formal training on such stuff and they are too young to have had much, if any, experience with what ratios are appropriate or not. They only recommend what they hear others recommend so don't put much faith into such recommendations. Even the shop guys are seldom into Jeeps enough to really understand the nuances of how ratio recommendations are significantly affected by transmission and/or engine type. Both the shop guys and counter sales guys often have the same exact ratio recommendations for a particular tire size whether it's a Jeep with a 2.5L engine and 5-speed manual or a Ford F-150 with a V8 and automatic transmission.
__________________
When you have a choice, buy American.

Jerry Bransford is offline   Quote Quick Reply
Old 04-22-2011, 12:20 AM   #10
Sporticus

WF Supporting Member
 
AdrenalineJunky45's Avatar
 
Join Date: Sep 2010
Location: Las Vegas NV
Posts: 276
I have a 2005 sport auto and am throwing a ford 8.8 in the rear with either and arb or ox, and throwin an arb in the front dana 30. i have 3.73 now and need to regear??? i want to run 35's at most, what do you recommend???

__________________
I dont know what WW3 will be fought with, but WW4 will be fought with Sticks and Stones.....
AdrenalineJunky45 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:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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 10:17 AM
speedo gears going nuts jeepskala TJ General Discussion Forum 7 03-09-2011 07:35 PM
Why 4.56 or 4.88 gears? up2nogood TJ General Discussion Forum 10 08-11-2010 12:49 PM
USA gears and noise? scopop JK Tech Forum 11 01-06-2010 11:41 AM
D35 and gears or upgrade. Urgent help please fliggyg TJ Tech Forum 9 11-10-2009 05:04 PM


logo carid shop wrangler parts carid fender flares custom wheels store avs deflectors at carid
» Rates
Get low rates on auto insurance in Canada!

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 07:08 PM.



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