Gears recommendation ? - 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 01-11-2010, 10:13 PM   #1
Newb
 
bbnate's Avatar
 
Join Date: Oct 2009
Location: Polk County, Florida
Posts: 3
Gears recommendation ?

So I have a 2001 Jeep Wrangler 3 spd auto with the 4.0 engine.. 33"s 3" lift. This thing only gets 10-12 mpg. I was looking to get a lil bit more performance out of it by installing some new gears. What do I currently have? What recommendation if I should upgrade?

bbnate is offline   Quote
Old 01-11-2010, 10:28 PM   #2
Jeeper
 
WTAggie's Avatar
 
Join Date: Jun 2009
Location: Texas
Posts: 83
I'm having the same problem with my 4.0L with a 4in lift and 33's. It's a standard and i was told 4.56 would work best. Since you have a automatic it might be different. 4.10 gears might work best. Hopefully someone else can give u a little more info on here.

WTAggie is offline   Quote
Old 01-11-2010, 11:01 PM   #3
Senior Member
 
Join Date: Sep 2008
Posts: 2,775
You in all likelihood have 3.73 gears in that jeep. Might be 3.07 though. Check the diff cover. On the left side there should be a tag. Clean it if you can't read it and it'll tell you what gears you have.

Assuming you have 3.73's and now 33" tires, 4.56 won't quite get you back to the stock ratio and 4.88 will get you "over" the stock ratio. So, either will work and most would select 4.88. (that's what I'd do).

Depends on what you want...slightly better highway MPG and don't ever plan to go bigger tires..4.56

Better (that 4.56) low end and a gear that will allow for 35's...4.88.

Oh, and what diff do you have? Easiest check is: Rubber plug = D35 and metal plug = D44. The dana 35 has been (widely) known to grenade with larger tires, especially while wheeling. Something to consider.
stevens243 is offline   Quote
Old 01-11-2010, 11:02 PM   #4
Jeeper
 
wasurfer86's Avatar
 
Join Date: Dec 2009
Location: WA
Posts: 1,156
Quote:
Originally Posted by bbnate View Post
So I have a 2001 Jeep Wrangler 3 spd auto with the 4.0 engine.. 33"s 3" lift. This thing only gets 10-12 mpg. I was looking to get a lil bit more performance out of it by installing some new gears. What do I currently have? What recommendation if I should upgrade?
i have 33's a 4 inch lift and im running 4.88's in both the front and rear axle. i get into the mid to high teens gas mileage wise. do you know what kind of axles you have? if you dont this link should hep you out. Axle Identification Chart
__________________
I bet pulp fiction wasn't the first time Bruce Willis had a ball gag in his mouth.
wasurfer86 is offline   Quote
Old 01-12-2010, 01:00 AM   #5
Jeeper
 
Join Date: Oct 2009
Location: San Diego
Posts: 759
youre not getting 10-12mpg. Thats with like 35's youve got to realize your speedometer is probably way off and youre getting liek 15 mpg or so. But still I dont know what you would need, I believe its 4.56 possibly 4.10
terrible2 is offline   Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not 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
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
Gears Gears Gears Help Jeepluv07 JK Tech Forum 3 04-27-2007 02:37 PM
Busted gears.... Mike001 TJ Tech Forum 9 01-29-2007 08:18 AM



Download our Mobile App

» Featured Product

All times are GMT -5. The time now is 08:55 PM.


User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd.

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