Just got the bad news. - 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 02-18-2012, 07:35 AM   #1
Jeeper
 
HD Wrangler's Avatar
 
Join Date: Mar 2011
Posts: 215
Just got the bad news.

Got the build sheet for my tj. I have a d30 front and 3.73 rear. It doesn't tell me the gear ratio for the front, our the diff type for the rear. I'm going to start collecting money for parts soon so I need to know what I'm working with. I have an 03 sahara, auto, I_6. I want to do things right before I start lifting and adding tires. Thanks. Any help is greatly appreciated.

HD Wrangler is offline   Quote Quick Reply
Old 02-18-2012, 07:38 AM   #2
Jeeper
 
InvertChaos's Avatar
 
Join Date: Sep 2010
Location: NoVa
Posts: 7,879
A d30 front isn't a bad thing, all wranglers except for the Rubicon have a d30 front and they're fine up to 35" tires. What you do need to worry about is the rear. Take a picture of it and we will be able to identify if its a d35 or d44.

As far as gear ratio goes, you have the same ratio in the back as in the front. 3.73 isn't too bad either as it was the numerically highest offered in a non-rubicon 6cyl.

__________________
|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 02-18-2012, 07:54 AM   #3
Jeeper
 
Join Date: Jun 2010
Posts: 2,121
The gear ratios are the same front and back or it don't work, The D30 is fine and I treat mine like crap and have had no trouble with a d35 rear. I do have an extra set of shafts that I picked up cheap and rebuilt just in case. If I pop one it's a 1 hour trail fix, and with them being the weak link it will save the expensive stuff.
Gate53 is offline   Quote Quick Reply
Old 02-18-2012, 08:20 AM   #4
Jeeper
 
Imped's Avatar
 
Join Date: Jan 2011
Location: Indy
Posts: 3,270
I'm failing to see how that is "bad" news. 3.73 is the deepest ratio offered in non-Rubicon TJ's (a good thing) and D44's only came with 3.73 gears. So, you 'could' have a D44. In which case, that's great news. If you've got a D35, at least it's worth more than $0 since some would like the lower 3.73 gearing compared to 3.07 or 3.55.

As for ratios, if they weren't the same you'd experience instant destruction the second you take off in 4wd. Those ratios have to be the same, as do the tire size due to the fact that when you're in 4wd, the drive shafts are literally coupled together at the transfer case. They will be spinning at the same rate so if the other end doesn't spin at the same rate, binding will occur and the weakest link will break.
Imped is offline   Quote Quick Reply
Old 02-18-2012, 08:23 AM   #5
Jeeper
 
InfernoGirl's Avatar
 
Join Date: May 2009
Location: Newburgh IN
Posts: 11,419
Quote:
Originally Posted by Gate53 View Post
The gear ratios are the same front and back or it don't work, The D30 is fine and I treat mine like crap
This is true, especially the bolded part....

Just look at the drain plug on the rear, if it's a plastic plug with a smooth face that just pops in and out it's a D35, if it's a metal plug that needs a socket driver to remove then it's a D44.... Easy peasy
__________________

Dirty Mudder column covers|

'01 Wrangler Sport, Sienna Pearl Mine
'07 Rubicon 2D, Flame Red His
'11 Wrangler Sport 4D, Black Ours...

Quote:
Originally Posted by Kate View Post
Not every girl, is a Jeep girl. We're a special breed.
InfernoGirl is offline   Quote Quick Reply
Old 02-18-2012, 09:11 AM   #6
Jeeper
 
coolbreeze's Avatar
 
Join Date: Jul 2009
Location: Redding, Ca
Posts: 855
Quote:
Originally Posted by InfernoGirl View Post
This is true, especially the bolded part....

Just look at the drain plug on the rear, if it's a plastic plug with a smooth face that just pops in and out it's a D35, if it's a metal plug that needs a socket driver to remove then it's a D44.... Easy peasy
Good job.

Anyway, I'm looking at my build sheet, trying to understand the confusion, and I think I found it.

Mine says:

Dana 30/186MM Front Axle
3.73 Axle Ratio
175MM Rear Axle

__________________
2004 Black X 4.0, auto, 3.73's, soft top 31-10.5-15 Toyo A/T's on 8" Ultra 175's, 2" Teraflex BB.
coolbreeze is offline   Quote Quick Reply
Old 02-18-2012, 09:15 AM   #7
Jeeper
 
WarBoomer's Avatar
 
Join Date: Jul 2010
Location: Bham, AL
Posts: 268
3.73 is what I have on my sport(with a 44). I run 33's no problem. My understanding was 3.73's were an upgrade with the d44 package. There is a strong probabilty that you have a 44. If so thats a hige win. Pull up her skirt and take a look at that plug to verify!
__________________
"The male body is utilitarian. It's for getting around. It's like a Jeep" - Elaine Benes.
WarBoomer is offline   Quote Quick Reply
Old 02-18-2012, 09:18 AM   #8
Jeeper
 
Join Date: Jun 2010
Posts: 2,121
If your deadset on axles look here: D A V E Y S J E E P S . C O M - Parts Specials
Gate53 is offline   Quote Quick Reply
Old 02-18-2012, 09:20 AM   #9
Jeeper
 
Imped's Avatar
 
Join Date: Jan 2011
Location: Indy
Posts: 3,270
Instead of using the build sheet, you could do this:

Let me google that for you

Then go look at your axle and compare. Not tough.
Imped is offline   Quote Quick Reply
Old 02-18-2012, 10:13 AM   #10
Jeeper
 
WarBoomer's Avatar
 
Join Date: Jul 2010
Location: Bham, AL
Posts: 268
__________________
"The male body is utilitarian. It's for getting around. It's like a Jeep" - Elaine Benes.
WarBoomer is offline   Quote Quick Reply
Old 02-18-2012, 10:57 AM   #11
Motorized Toy Collector

WF Supporting Member
 
TJDave's Avatar
 
Join Date: Nov 2008
Location: Eastern WA State
Posts: 2,870
Quote:
Originally Posted by WarBoomer View Post
My understanding was 3.73's were an upgrade with the d44 package. There is a strong probabilty that you have a 44.
3.73's are standard gearing for an '03 and up TJ's with the 42rle auto. D35 or D44. That lessens the good news a bit.
TJDave is offline   Quote Quick Reply
Old 02-18-2012, 11:19 AM   #12
Jeeponator

WF Supporting Member
 
Michigunman's Avatar
 
Join Date: Aug 2010
Location: Cumming, GA
Posts: 1,234
175MM Rear Axle = Dana 35
__________________
Michigunman

Just because you can doesn't mean you should.
Michigunman is offline   Quote Quick Reply
Old 02-18-2012, 11:20 AM   #13
Jeeper
 
KrzyMoke's Avatar
 
Join Date: Nov 2011
Location: La Marque, TX
Posts: 464
Quote:
Originally Posted by Imped View Post
Instead of using the build sheet, you could do this:

Let me google that for you

Then go look at your axle and compare. Not tough.
LOLLERZ

Me Likey
__________________
Kimo

2003 Jeep Wrangler Rubicon


Remember to Tread Lightly
KrzyMoke is offline   Quote Quick Reply
Old 02-18-2012, 11:57 AM   #14
Jeeper
 
HD Wrangler's Avatar
 
Join Date: Mar 2011
Posts: 215
Thanks for all the help everyone. Sorry for the newbie questions I tried searching and just could not find the answers I was looking for.
Imped- ill remember to use the internet a reference next time.

HD Wrangler 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
Whats the best oil to use? mfaas88 JK General Discussion Forum 66 09-18-2013 09:25 AM
Any Wranglers near the Madison, WI area? mfaas88 JK General Discussion Forum 25 08-28-2012 04:24 PM
gas prices on the rise PA ARCTIC Off-Topic 72 04-11-2012 08:54 PM
I think I just died a little... BT Off-Topic 17 02-18-2012 10:52 PM
got sqeak scottytx JK General Discussion Forum 3 02-18-2012 07:20 AM



» Featured Product

All times are GMT -5. The time now is 03:24 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