LOOK....LML Gear oil Change - Chevy and GMC Duramax Diesel Forum
Drivetrain Discussion on gearing, CV joints, driveshafts, axles, brakes, etc.

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 30 (permalink) Old 02-12-2013, 04:09 PM Thread Starter
Junior Member
 
Dmax Payne's Avatar
 
Join Date: Jun 2012
Location: Murphy NC
Posts: 135
LOOK....LML Gear oil Change

well i changed my rear diff gear oil today after thinking about it for the last couple months. i dont know if this is normal but made me very happy i changed the oil and makes me wish i had listened to others on here and done it sooner. both of the magnet plugs had this on them and thats only half of the stuff on one plug on my finger in the picture

if you are one reading this like me putting it off changing yours do it now. my truck is only at 15k
Attached Images
File Type: jpg IMG_0274.jpg (48.8 KB, 434 views)
File Type: jpg IMG_0273.jpg (55.7 KB, 428 views)

2012 GMC 2500HD Cognito leveling kit, 275/65 20 Toyo MT on 20x9 chrome Fuel Octane wheels, trex billet grills, 5" flow pro Custom Dual exhaust with down pipe, mini maxx, fass titanium 150, egr gone bye bye
Dmax Payne is offline  
Sponsored Links
Advertisement
 
post #2 of 30 (permalink) Old 02-12-2013, 11:13 PM
Senior Member
 
stanleyrock's Avatar
 
Join Date: Jun 2011
Location: Idaho
Posts: 807
When the lb7's first came out GM was recommending changing out rear axle fluid after first 500 miles (yes five hundred). So many people complained about this that they just dropped the recommendation. This is according to the dealer I bought mine from, who told me to do it. I did it at 500 and again at 50,000, and the magnet was noticeably cleaner the second time.

2004 lb7 Cali. emissions ECLB 2500 HD. Tows 12K lb. 5th wheel.
Injectors replaced at 49K miles (Jan. 2012).
EFI Live by Idaho Rob with Edge Insight CTS and pyro.
Fumoto drain valve and stainless bleeder screw from Merchant.
Bilstein 5100's from Norcal Nick.
Prodigy P3 brake controller.
Transynd, Mobil Delvac and Stanadyne PF.
stanleyrock is offline  
post #3 of 30 (permalink) Old 02-13-2013, 12:05 AM
DuramaxForum Fanatic
 
mackyoudip's Avatar
 
Join Date: Nov 2009
Posts: 6,214
New gears seem to leave a lot on the magnet. I guess its just getting them broken in? Mine hasn't had a thing on the magnet since my first gear oil change..yes the magnet is still there.

Mack: 2014 GMC Sierra gas 5.3
Previous owner of many duramax's fast and slow.
mackyoudip is offline  
post #4 of 30 (permalink) Old 02-13-2013, 12:43 AM
gpn
Senior Member
 
gpn's Avatar
 
Join Date: Sep 2012
Location: Northern AZ
Posts: 345
When I setup new gears I run em for 500-700 miles and then change fluid. Its always got crap in it. The gears break into each other.

Currently:
2006 CCSB LBZ ~ 4" exhaust/AFE intake ~ Pyro/Boost on the a-pillar ~ EFI Live w/ dsp 5 ~ CAT fuel filter ~ 5100's

quid leges sine moribus vanae proficient

ARIZONA DIESEL CLUB
gpn is offline  
post #5 of 30 (permalink) Old 02-13-2013, 01:20 AM
DuramaxForum Guru
 
HD Dmax Machine's Avatar
 
Join Date: May 2011
Location: Nomad
Posts: 11,540
I didnt change my gear oil (for the 1st time) until I had 55-60K miles & it was very nasty.


2009 GMC 2500HD SLE CC/SB 4x4 LMM
EFI Live, Edge Insight CTS, Flo~Pro 4" DP back exhaust w/ muffler & stock trumpet tip, EGR disabled, Resonator delete plug, Alum. bleeder screw, WIF sensor delete plug, Fumoto oil drain valve, Pacer LED cab lights, GM dually light bar under tailgate, Footwell lights, Cobra 29 WXNWST CB radio, Wilson 2000 CB antenna, Kenwood speakers, GM chrome oval running boards, Bilstein 5100s, Michelin M/S2 on PY0 wheels, Rubber mud flaps, Curt class IV hitch
HD Dmax Machine is offline  
post #6 of 30 (permalink) Old 02-13-2013, 06:16 AM
Junior Member
 
delsolcharlie's Avatar
 
Join Date: Nov 2012
Location: Prairieville, LA
Posts: 59
What fluid did you replace it with?

2013 2500HD Denali
anxious to start working on it
delsolcharlie is offline  
post #7 of 30 (permalink) Old 02-13-2013, 06:22 AM
Banned
 
Join Date: Jan 2010
Location: On the Coast of Somewhere Beautiful
Posts: 5,738
That's completely normal...

What did you replace the grape stuff with?
smokinlmm is offline  
post #8 of 30 (permalink) Old 02-13-2013, 08:28 AM
Senior Member
 
stanleyrock's Avatar
 
Join Date: Jun 2011
Location: Idaho
Posts: 807
I used Mobil 1 synthetic 75w90

2004 lb7 Cali. emissions ECLB 2500 HD. Tows 12K lb. 5th wheel.
Injectors replaced at 49K miles (Jan. 2012).
EFI Live by Idaho Rob with Edge Insight CTS and pyro.
Fumoto drain valve and stainless bleeder screw from Merchant.
Bilstein 5100's from Norcal Nick.
Prodigy P3 brake controller.
Transynd, Mobil Delvac and Stanadyne PF.
stanleyrock is offline  
post #9 of 30 (permalink) Old 02-13-2013, 08:59 AM
Junior Member
 
SuitsandBoots's Avatar
 
Join Date: Nov 2012
Location: Texas
Posts: 83
Changed mine last week at 55k ... Smelled horrible!

2009 GMC Sierra SLT LMM Z71 4X4 CCSB
PPE (Mike L) Transmission Cooler
Kory Willis (PPEI) Tuning
Flo Pro DPF Delete Pipe
EGR Closed via tuning (Need to install blocker plate)
S&B Intake - Dry Filter
Ranch Hand replacement front and rear bumpers
SuitsandBoots is offline  
post #10 of 30 (permalink) Old 02-13-2013, 09:23 AM
DuramaxForum Enthusiast
 
Join Date: Nov 2011
Location: NorCal
Posts: 2,406
Changed mine to Mobile1 at 2500mi and it looked pretty much the same. Every vehicle I have owned I haved changed out the diff oil early with similar results. Dont know why all manufacterers recommend waiting 10s of thousands of mi. before changing out the first time.
Sandman_73 is offline  
Sponsored Links
Advertisement
 
Reply
Gear in this thread - Powered by O'Reilly Auto Parts

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Chevy and GMC Duramax Diesel 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:
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.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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 On
Pingbacks are On
Refbacks are On

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