HELP!!! Front Axle Gears Backlash - JeepForum.com
 
LinkBack Thread Tools
post #1 of 13 Old 03-19-2013, 07:25 PM Thread Starter
Gordon-0
Registered User
2002 TJ Wrangler 
 
Join Date: Dec 2012
Location: Virginia Beach
Posts: 183
HELP!!! Front Axle Gears Backlash

Just finished installing a Spartan Locker in the front (D30) of my TJ.
Before I took the bearing caps off to remove the carrier, I never thought to get a feel for how much movement there was in the Ring and Pinion gears.

After finishing installation, I've got the bearing caps torqued down as tight as I feel comfortable, and the locker itself is working as expected, but I am nervous about the amount of backlash I can feel in the gears.

I will go get a feeler gauge tomorrow to check exactly how much there is.

1) I never removed the ring gear, since I have 3.07 gears, it wasn't necessary.
2) I marked the bearing caps when they were still in the axle
3) To back up my feelings that the bearing caps are correctly positioned, there are corresponding marks on the axle housing which match the marks on the bearing caps. The Passenger side is a " < " and points the same way on the axle and the bearing cap. the Driver side is an " ^ " and also points the same way on the axle and the bearing cap. as you can see, there is no way to get this wrong.
4) I am 99.999% sure that the bearing race and the actual bearing are installed in the same place they were before. The bearing body never came off the carrier, and the race was left on that side of the axle. I am only a little bit uncertain because I was upside down at the time of re-installation, but I cannot believe I would have gotten that wrong.
5) I have never even TOUCHED the inside of an axle before, so what I am feeling as far as backlash may be completely normal, and I am blowing it out of proportion.

Can anybody read this and make some sense of it?
I really don't want to trash my gears/bearings/axle.

Thank you in advance

Gordon-0 is offline  
Sponsored Links
Advertisement
 
post #2 of 13 Old 03-19-2013, 07:27 PM
rchase559
Registered User
2003 TJ Wrangler 
 
Join Date: Nov 2009
Location: 'Merica
Posts: 2,232
You need a dial indicator to measure backlash, not feeler gauges.

Other than that, if you didn't mix anything up during reassembly then the backlash of the gears can't change. It may have been loose to start with, I know the factory setup on my rear D44 was.
rchase559 is offline  
post #3 of 13 Old 03-19-2013, 07:38 PM Thread Starter
Gordon-0
Registered User
2002 TJ Wrangler 
 
Join Date: Dec 2012
Location: Virginia Beach
Posts: 183
Quote:
Originally Posted by rchase559
You need a dial indicator to measure backlash, not feeler gauges.

Other than that, if you didn't mix anything up during reassembly then the backlash of the gears can't change. It may have been loose to start with, I know the factory setup on my rear D44 was.
How do I set up a dial indicator?
I was going to measure the gap between gears...

Should I not worry then?
Gordon-0 is offline  
post #4 of 13 Old 03-19-2013, 08:16 PM
freeskier93
Registered User
1997 TJ Wrangler 
 
Join Date: Oct 2009
Location: Longmont
Posts: 7,138
I would stop worrying, you didn't do anything that could change backlash. If you happen to have a dial indicator it wouldn't hurt to see what it is.
freeskier93 is offline  
post #5 of 13 Old 03-19-2013, 08:25 PM Thread Starter
Gordon-0
Registered User
2002 TJ Wrangler 
 
Join Date: Dec 2012
Location: Virginia Beach
Posts: 183
Quote:
Originally Posted by freeskier93
I would stop worrying, you didn't do anything that could change backlash. If you happen to have a dial indicator it wouldn't hurt to see what it is.
This is what I was hoping to hear. The movement isn't enough to see, but I can hear it and feel it.
Gordon-0 is offline  
post #6 of 13 Old 03-19-2013, 08:36 PM
freeskier93
Registered User
1997 TJ Wrangler 
 
Join Date: Oct 2009
Location: Longmont
Posts: 7,138
Quote:
Originally Posted by Gordon-0

This is what I was hoping to hear. The movement isn't enough to see, but I can hear it and feel it.
As someone who has set up gears I can tell you that .006" of backlash actually feels like a lot, and the clicking sound is very amplified by an "empty" housing.
freeskier93 is offline  
post #7 of 13 Old 03-19-2013, 09:19 PM
chevy2169
Registered User
2006 TJ Wrangler 
 
Join Date: Jun 2011
Location: Amherst
Posts: 1,018
Quote:
Originally Posted by freeskier93 View Post
As someone who has set up gears I can tell you that .006" of backlash actually feels like a lot, and the clicking sound is very amplified by an "empty" housing.
^ this. Normal. Put it together and put some fluid in it man.

Some say a comet will fall from the sky.
Followed by meteor showers and tidal waves.
Followed by faultlines that cannot sit still.
Followed by millions of dumbfounded dip****s.
chevy2169 is offline  
post #8 of 13 Old 03-19-2013, 10:11 PM Thread Starter
Gordon-0
Registered User
2002 TJ Wrangler 
 
Join Date: Dec 2012
Location: Virginia Beach
Posts: 183
Thanks everyone.
Gordon-0 is offline  
post #9 of 13 Old 03-19-2013, 10:25 PM
rchase559
Registered User
2003 TJ Wrangler 
 
Join Date: Nov 2009
Location: 'Merica
Posts: 2,232
Quote:
Originally Posted by Gordon-0

How do I set up a dial indicator?
I was going to measure the gap between gears...

Should I not worry then?
I would put it back together and not worry.

In case you're curious or just want to learn something new there are a few tutorials on the net that show how to position the indicator and measure the backlash. You need a magnetic base to go along with the dial indicator.
rchase559 is offline  
post #10 of 13 Old 03-20-2013, 07:30 AM
tators
Registered User
1997 TJ Wrangler 
 
Join Date: Apr 2012
Location: Old Hickory
Posts: 149
And for future reference ... when you torque bearing caps... that means you use a TORQUE wrench and tighten to specified torque setting...
tators is offline  
post #11 of 13 Old 03-20-2013, 07:33 AM Thread Starter
Gordon-0
Registered User
2002 TJ Wrangler 
 
Join Date: Dec 2012
Location: Virginia Beach
Posts: 183
Quote:
Originally Posted by tators
And for future reference ... when you torque bearing caps... that means you use a TORQUE wrench and tighten to specified torque setting...
I have an inch pound wrench but still need to go get a foot pound one for stuff like this.

I wasn't expecting to remove the carrier but I couldn't get the roll pin out otherwise, so out it came.
Gordon-0 is offline  
post #12 of 13 Old 03-21-2013, 09:12 AM Thread Starter
Gordon-0
Registered User
2002 TJ Wrangler 
 
Join Date: Dec 2012
Location: Virginia Beach
Posts: 183
Well everything works great.

I finished everything up, put new pads, calipers, and hoses on (I was having intermittent brake drag on one side) and filled her up.

At first I was doubting the thing was even working, I got no clicking or anything. Put it in 4-low and did some figure 8s in a field and it locked up just as expected.
I do get a slight bind when reversing with the wheel turned in 2wd but that's not a real concern I guess.

Thanks to everyone who helped ease my nerves

Mark me down a happy Spartan Locker customer
Gordon-0 is offline  
post #13 of 13 Old 03-21-2013, 10:39 AM
FarmerinVA
Registered User
1999 TJ Wrangler 
 
Join Date: Oct 2010
Location: Tappahannock
Posts: 612
Sounds like you're good. If you are curious about backlash, see the install thread in my sig. I was a novice when I did it so I explained at a level that a novice (as to backlash ... not to imply that you're a novice otherwise) would understand. I agree with those who say you don't need to think about it. You didn't change yours.

My do-it-yourself install thread for a TrueTrac in the rear, upgraded shafts, and a PowerTrax No-Slip in the front:

http://www.jeepforum.com/forum/f9/ex...hafts-1234745/
FarmerinVA is offline  
Reply

Tags
aussie , axle , backlash , locker , wrangler

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com 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 e-mail address for yourself.



Email Address:
OR

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.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



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 On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome