What gears should I run with 33X12.50 tires with I-4 cyl engine in my 90 Wrangler? - Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ 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 05-19-2010, 12:35 PM   #1
Jeeper
 
Join Date: May 2010
Posts: 15
What gears should I run with 33X12.50 tires with I-4 cyl engine in my 90 Wrangler?

I have a 1990 Wrangler with the inline 4 banger, 5 speed and am running 33X12.50" tires with 3" suspension lift. I believe the stock gears are 4.10s. What should I change them to? I understand they need to be something like 4.88s or something of that sort but not familiar with gears and the work involved to install. Please help!

PJBASEBALL99 is offline   Quote
Old 05-19-2010, 01:05 PM   #2
Jeeper
 
GroundHawg's Avatar
 
Join Date: Apr 2010
Location: northeast ohio
Posts: 2,274
Installing gears is very difficult, and time consuming. Most people can't install them. I know how and can do it, and if I get to the point where I need new gears, I'll pay a shop to do it because it sucks that bad.

New gears are 350 per axle, give or take. Both axles get gears, so 600-700 for gears. The install takes me all day, so that's about 500 bucks labor. Look to spend $1000-1500 to get new ones.

I always suggest to folks to put the tires on. Drive it a month. Then if you don't like it, we can talk about gears. I go low as your axles will allow. 4.88 or 5.13 maybe?

GroundHawg is offline   Quote
Old 05-19-2010, 01:12 PM   #3
Jeeper
 
Join Date: May 2010
Posts: 15
I have heard gearing is expensive, I am considering putting 265/75/R16s from my old truck and running those, but don't know what they would look like with a 3" lift. I love the look with the 33's, but don't want to blow my engine or tranny anytime soon.
PJBASEBALL99 is offline   Quote
Old 05-19-2010, 01:19 PM   #4
Electrical Guy

WF Supporting Member
 
deathphoenix99's Avatar
 
Join Date: Apr 2010
Location: Houston, TX
Posts: 2,619
Could always look into buying new axles with the gearing you want. I don't think they made stock and lower than 4.10, but maybe you can find someone who swapped gears already.
deathphoenix99 is offline   Quote
Old 05-19-2010, 06:08 PM   #5
Jeeper
 
Join Date: Oct 2009
Location: chair
Posts: 190
I'm running a similar set up, I've got a 4 cyl engine with 35" tires and a little more lift. My gears are currently 4.88 and it's not low enough. I talked to a Jeep guy at Aamco about going to 33X12.50" like you have and he said if I did that 4.88 would be perfect. Also, since I'm never one to just take a mechanics word for it without a little research of my own, I checked it out on a calculator. Enter your set up in here and it will give you a little idea.
Randy's Ring & Pinion. RPM Calculator.
__________________
This is my signature.
Screwjack is offline   Quote
Old 05-19-2010, 07:55 PM   #6
Jeeper
 
Join Date: May 2010
Posts: 44
I have a 95 and 33x12.50x15 and i lost fith gear i did some checking for my jeep and was told by most everyone who wheels to go with either 4.56 or 4.88 gears that either of those will be great if you go with 4.56 its closer to factory rating and for a littel more power you would go with a 4.88 myself personaly i'm going with 4.88

sincityjeepman 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
'97 Wrangler Cold Idle / Load Flooding Problem brad07x TJ Tech Forum 1 12-18-2009 11:10 PM
New Tires on a 2003 Wrangler jiminmanjr TJ General Discussion Forum 7 11-17-2009 09:17 AM
1998 Wrangler 4 liter engine removal scotsmann7 TJ Tech Forum 1 06-12-2009 01:00 AM
Engine swap/89 Wrangler Joes YJ General Discussion Forum 8 03-18-2007 02:52 AM
wrangler for sale, engine conversion, 33 inch tires outdoorsman Classifieds Archive 0 09-13-2005 08:29 PM



Download our Mobile App

» Featured Product

All times are GMT -5. The time now is 09:18 AM.


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