axle swapping with lunchbox locker - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ 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 06-02-2014, 01:24 AM   #1
Jeeper
 
mrkswthwrth's Avatar
 
Join Date: May 2013
Posts: 102
axle swapping with lunchbox locker

Hey guys and gals, I drive a 94 2.5l i4 with approx 4in lift on stock d35 4.10 axles and stock tires. My girlfriend drives an 89 4.2l i6 with with 3.07 gear ratio (I believe) and a lunchbox locker in back that a PO put in it. She hates the tires chirping on the road and wants the locker out. So I am picking up an axle from a yj that has 3.07 gears without a locker, and this is my question. If I take her old axle apart, can I put the locker in my axle to give me an LSD with my 4.10 gear ratio? I read somewhere online that it could possibly work in a tj, but I would like to see what you folks have to say.
If anybody needs any more detail, I'll tell you everything I can.
Cheers!

mrkswthwrth is offline   Quote Quick Reply
Old 06-02-2014, 05:31 AM   #2
Jeeper
 
Join Date: May 2014
Posts: 112
As long as they are the same type rear axle you should be able to remove the carrier and swap it out. But, you will have to transfer your ring gear from your old carrier to the new carrier and set the ring gear backlash. If you've never done this before you may want to leave it to someone with more experience. Improper backlash can cause gear whine or premature failure. Also, food for thought.....why pick up another axle to swap out in your GF's Jeep? Swap your carrier for hers. You're already talking of removing yours anyway.

JMickey is offline   Quote Quick Reply
Old 06-02-2014, 07:45 AM   #3
Jeeper
 
Mowrangler's Avatar
 
Join Date: Jun 2013
Location: Tampa Fl.
Posts: 1,379
Quote:
Originally Posted by JMickey View Post
As long as they are the same type rear axle you should be able to remove the carrier and swap it out. But, you will have to transfer your ring gear from your old carrier to the new carrier and set the ring gear backlash. If you've never done this before you may want to leave it to someone with more experience. Improper backlash can cause gear whine or premature failure. Also, food for thought.....why pick up another axle to swap out in your GF's Jeep? Swap your carrier for hers. You're already talking of removing yours anyway.
Doesn't a lunch box locker just replace the spider gears?
If that is true then all he needs to do is swap his spider gears and pin out no need to remove the carrier or ring gear.
__________________
95 YJ 2.5 5 speed 33" Mud Rovers SOA
A frustrating WORK IN PROGRESS
Mowrangler is offline   Quote Quick Reply
Old 06-02-2014, 08:27 AM   #4
Jeeper
 
mrkswthwrth's Avatar
 
Join Date: May 2013
Posts: 102
So I can change put my spider gears from the 3.07 to the 4.10 (and vice versa) and maintain my ratios?
mrkswthwrth is offline   Quote Quick Reply
Old 06-02-2014, 08:29 AM   #5
Jeeper
 
mrkswthwrth's Avatar
 
Join Date: May 2013
Posts: 102
The whole reason I was going to get the 3rd axle in the mix is because the new rear d35 will cost 100 bucks with brand new drums.
mrkswthwrth is offline   Quote Quick Reply
Old 06-02-2014, 08:35 AM   #6
IITYWTMWYBMAB

WF Supporting Member
::WF Administrator::
 
4Jeepn's Avatar
 
Join Date: Apr 2005
Location: Florence, KY
Posts: 10,268
Images: 5
one ID the exact locker she does have, 2, verify the part numbers will work with your rear axle, 3, remove your spider gears and insert the locker.
__________________
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 06-02-2014, 08:40 AM   #7
Jeeper
 
Mowrangler's Avatar
 
Join Date: Jun 2013
Location: Tampa Fl.
Posts: 1,379
Quote:
Originally Posted by mrkswthwrth View Post
So I can change put my spider gears from the 3.07 to the 4.10 (and vice versa) and maintain my ratios?
The spider gears have nothing to do with the gear ratio however they may be different between the two axles. Call the dealer and confirm the part numbers for the spider gears for both vehicles before disassembly.
__________________
95 YJ 2.5 5 speed 33" Mud Rovers SOA
A frustrating WORK IN PROGRESS
Mowrangler is offline   Quote Quick Reply
Old 06-02-2014, 08:42 AM   #8
Jeeper
 
mrkswthwrth's Avatar
 
Join Date: May 2013
Posts: 102
Quote:
Originally Posted by 4Jeepn View Post
one ID the exact locker she does have, 2, verify the part numbers will work with your rear axle, 3, remove your spider gears and insert the locker.
Should the name be punched in the gears somewhere? We bought this jeep on Wednesday and the PO said he has no idea what brand locker its got, it was there when be bought it.
mrkswthwrth is offline   Quote Quick Reply
Old 06-02-2014, 08:45 AM   #9
Jeeper
 
mrkswthwrth's Avatar
 
Join Date: May 2013
Posts: 102
Quote:
Originally Posted by Mowrangler View Post

The spider gears have nothing to do with the gear ratio however they may be different between the two axles. Call the dealer and confirm the part numbers for the spider gears for both vehicles before disassembly.
I am pretty new to differentials, all I know is the difference between lockers, open difs, LSD, etc.. So thanks for clarifying. I will call the dealer when they open up in an hour.
mrkswthwrth is offline   Quote Quick Reply
Old 06-02-2014, 09:41 AM   #10
IITYWTMWYBMAB

WF Supporting Member
::WF Administrator::
 
4Jeepn's Avatar
 
Join Date: Apr 2005
Location: Florence, KY
Posts: 10,268
Images: 5
Quote:
Originally Posted by mrkswthwrth View Post
Should the name be punched in the gears somewhere? We bought this jeep on Wednesday and the PO said he has no idea what brand locker its got, it was there when be bought it.
Once you get the diff cover off post a pic of the internals/locker and we can give you a good idea of what locker you have. From there we just need to see if the application is the same between the model year jeeps.
__________________
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 06-02-2014, 09:47 AM   #11
Jeeper
 
mrkswthwrth's Avatar
 
Join Date: May 2013
Posts: 102
According to this guy, there is a difference between the 89 and 94 spider gears.

Sorry for linking out of the forum.
http://www.jeepforum.com/forum/f12/d...gears-1424356/
mrkswthwrth is offline   Quote Quick Reply
Old 06-02-2014, 10:28 AM   #12
Jeeper
 
Join Date: May 2014
Posts: 112
Quote:
Originally Posted by Mowrangler View Post
Doesn't a lunch box locker just replace the spider gears?
If that is true then all he needs to do is swap his spider gears and pin out no need to remove the carrier or ring gear.
I should've googled it before I responded. I thought it was a carrier assembly. If it is a replacement for the spiders then that makes it real easy.
JMickey is offline   Quote Quick Reply
Old 06-02-2014, 10:37 AM   #13
Jeeper
 
mrkswthwrth's Avatar
 
Join Date: May 2013
Posts: 102
I just called the local Mopar, the part number for rear d35 spider gears in the 89 is 83503002
The part number for the rear d35 spider gears in the 94 is 4637393

However they both have the same part number for a replacement dif assembly.
mrkswthwrth is offline   Quote Quick Reply
Old 06-02-2014, 12:30 PM   #14
Jeeper
 
Join Date: May 2014
Posts: 112
I would look up the lunchbox locker and see what years it covers. If the part numbers for the '89 and the '94 are the same you're probably OK, but it's looking as if they will be different.
JMickey is offline   Quote Quick Reply
Old 06-02-2014, 12:41 PM   #15
Jeeper
 
mrkswthwrth's Avatar
 
Join Date: May 2013
Posts: 102
Quote:
Originally Posted by JMickey View Post
I would look up the lunchbox locker and see what years it covers. If the part numbers for the '89 and the '94 are the same you're probably OK, but it's looking as if they will be different.
Well I think I'll do that tomorrow. I've got no clue what brand it is, and its a daily driver so I can't just park it and wait til I can do the swap. I'll do some research and see if any companies have what I'm looking for here.
mrkswthwrth is offline   Quote Quick Reply
Old 06-02-2014, 12:48 PM   #16
Jeeper
 
mrkswthwrth's Avatar
 
Join Date: May 2013
Posts: 102
Spartan appears to have one that fits both, assuming the carrier is the same size.

Edit:: looks like my carrier would be bigger than hers. The 3.07 has less back spacing than the 4.10 carrier. Or may e its the opposite.. I don't know, but it requires a different one. The break is at 3.73 gear ratio, if its below it is one size, above is another.
mrkswthwrth is offline   Quote Quick Reply
Old 06-05-2014, 10:05 AM   #17
Jeeper
 
Join Date: Aug 2011
Location: north of St.Franisville La.
Posts: 2,368
Send a message via Yahoo to Nubby55
There may be C-Clip vs non C-Clip also. there changed in 1990 I think, when I got a new axle I had to know I had before ordering for a 90 YJ.
__________________
The Government can not give anything to anybody that it does not first take from someone else !
Nubby55 is offline   Quote Quick Reply
Old 06-05-2014, 10:12 AM   #18
Jeeper
 
mrkswthwrth's Avatar
 
Join Date: May 2013
Posts: 102
I figured that would make a difference too. I decided to just buy a new axle for her jeep and sell off her old one, because I won't be able to use it. Actually I'm going to get the axle this afternoon.
mrkswthwrth is offline   Quote Quick Reply
Old 06-09-2014, 11:05 PM   #19
Jeeper
 
Join Date: Mar 2014
Posts: 17
the diameter of the axle in the d35 may be difffernet as well through 93 was 1.6.... in 95 its like 1.5.... in 1994 they used both. You will have to pop the diff cover and actually measure the axle shaft in the 94.

if they are the same lunchbox lockers are easy to install,

i would in no way go to a higher gear for a $250 locker
wartyOknuckles is offline   Quote Quick Reply
Old 06-10-2014, 12:58 AM   #20
Jeeper
 
reno92's Avatar
 
Join Date: May 2013
Location: Cardiff By The Sea / Glamis
Posts: 1,168
The break in carrier size is 3.73 up and down. You will have differant carriers from the 4.10 to the 3.07, I think the lunchbox are carrier specific.
reno92 is offline   Quote Quick Reply
Old 08-18-2014, 06:18 PM   #21
Jeeper
 
adriannenicolef's Avatar
 
Join Date: May 2014
Location: Upstate NY
Posts: 71
Hey guys! I'm the girlfriend he was talking about.
My Jeep rolled outta the factory with a 2.5L engine, which would mean 4.10 gear ratio. So, unless someone was an idiot and changed the gears when they swapped the old engine out for a 4.2L, we're pretty sure I have 4.10 ratio, not 3.07.
Also, when Mark pulled the cover off the differential to see what's up with the locker, he discovered that my spider gears are welded to the carrier, creating what's known as a "Lincoln locker" or, in other words, poor mans locker. It's a pain in the ass. It sounds like there's a car accident every time I turn the corner because my tires squeal.

So, I'm hijacking this thread from my lovely boyfriend to ask you, is there a way to remove the Lincoln locker without replacing the entire axle?
If not, we found a Ford 8.8 axle for cheap that we could swap right in.

__________________
Badass girls drive badass toys.

1989 Wrangler YJ
adriannenicolef 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




Download our Mobile App

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 07:04 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