Changed diff oil again, 24k on it. - Jeep Garage - Jeep Forum

Go Back   Jeep Garage - Jeep Forum > Jeep Platform Discussion > Grand Cherokee - WK2 - > Suspension/Driveline/Brakes/Wheels/Tires

Reply
 
Thread Tools Display Modes
 
  #1  
Old 03-14-2016, 08:43 PM
The Evil Twin's Avatar
Member
My Jeep: 2011 5.7L WK2
 
Join Date: Jan 2013
Location: Gainesville, VA
Posts: 684
Thanks: 37
Thanked 81 Times in 63 Posts
Rep Power: 440588
The Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond repute
Garage
Changed diff oil again, 24k on it.

So I figured this might be of interest to some of you. A couple years ago I did a DIY on changing the differential oil in the Jeep. Since it's been a few years and 24000 miles I decided to do it again. Amsoil takes very good care of me and provided the material this time so I was eager to see what the oil looked like this time.
In that 24k interval, the GC has seen snow (and the shenanigans that go along with it), some mild off roading, about 9000 miles towing (3-4k pounds) and a couple runs up to 100+ mph (race track, not the street ) and the typical daily driving.
As I suspected, the ELSD rear turned the golden goodness fairly black. The front was still honey colored. Typical of clutch operated LSD rear ends.
Both these photos are from the rear. The full cup made it look black, which it was not.






__________________
#132-Motosylum Racing

2017 Sponsors: Amsoil, SHOEI, www.DC-MOTO.net, Woodcraft-CFM, VP Racing Fuels, www.MARRC.org
Amsoil 5w-20 synthetic meets Chrysler MS-6395 for my Jeep!
Reply With Quote
The Following User Says Thank You to The Evil Twin For This Useful Post:
Sponsored Links
Advertisement
 
  #2  
Old 03-14-2016, 08:50 PM
GoPlzGo's Avatar
formerly 14summithemi
My Jeep: 2015 6.4L SRT WK2
 
Join Date: Oct 2013
Location: Cleveland, OH
Posts: 3,504
Thanks: 490
Thanked 665 Times in 546 Posts
Rep Power: 26096
GoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond repute
Re: Changed diff oil again, 24k on it.

pics r not showing...try again pls...thx
__________________
'15 JGC SRT Bright White Red Vapor...Borla ATAK Cat-back w/ ceramic coated axle-back, aFe Momentum GT Pro 5R Stage-2 Intake & Billet Tech Oil Catch Can
Reply With Quote
  #3  
Old 03-14-2016, 09:15 PM
The Evil Twin's Avatar
Member
My Jeep: 2011 5.7L WK2
 
Join Date: Jan 2013
Location: Gainesville, VA
Posts: 684
Thanks: 37
Thanked 81 Times in 63 Posts
Rep Power: 440588
The Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond repute
Garage
Re: Changed diff oil again, 24k on it.

Stupid permission settings
How about now?
__________________
#132-Motosylum Racing

2017 Sponsors: Amsoil, SHOEI, www.DC-MOTO.net, Woodcraft-CFM, VP Racing Fuels, www.MARRC.org
Amsoil 5w-20 synthetic meets Chrysler MS-6395 for my Jeep!
Reply With Quote
Sponsored Links
Advertisement
 
  #4  
Old 03-14-2016, 09:27 PM
GoPlzGo's Avatar
formerly 14summithemi
My Jeep: 2015 6.4L SRT WK2
 
Join Date: Oct 2013
Location: Cleveland, OH
Posts: 3,504
Thanks: 490
Thanked 665 Times in 546 Posts
Rep Power: 26096
GoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond repute
Re: Changed diff oil again, 24k on it.

bingo, thx

EDIT, only 2 made it
__________________
'15 JGC SRT Bright White Red Vapor...Borla ATAK Cat-back w/ ceramic coated axle-back, aFe Momentum GT Pro 5R Stage-2 Intake & Billet Tech Oil Catch Can
Reply With Quote
  #5  
Old 03-14-2016, 10:56 PM
The Evil Twin's Avatar
Member
My Jeep: 2011 5.7L WK2
 
Join Date: Jan 2013
Location: Gainesville, VA
Posts: 684
Thanks: 37
Thanked 81 Times in 63 Posts
Rep Power: 440588
The Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond repute
Garage
Re: Changed diff oil again, 24k on it.

There were only 2. Probably didn't delete all the failed ones.
__________________
#132-Motosylum Racing

2017 Sponsors: Amsoil, SHOEI, www.DC-MOTO.net, Woodcraft-CFM, VP Racing Fuels, www.MARRC.org
Amsoil 5w-20 synthetic meets Chrysler MS-6395 for my Jeep!
Reply With Quote
The Following User Says Thank You to The Evil Twin For This Useful Post:
  #6  
Old 03-14-2016, 11:00 PM
GoPlzGo's Avatar
formerly 14summithemi
My Jeep: 2015 6.4L SRT WK2
 
Join Date: Oct 2013
Location: Cleveland, OH
Posts: 3,504
Thanks: 490
Thanked 665 Times in 546 Posts
Rep Power: 26096
GoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond repute
Re: Changed diff oil again, 24k on it.

got it, yeah wet-clutch wear soups up the oil good...did in my 2-stroke motocross bikes, had to change every 5 rides or 1 day of motos.
__________________
'15 JGC SRT Bright White Red Vapor...Borla ATAK Cat-back w/ ceramic coated axle-back, aFe Momentum GT Pro 5R Stage-2 Intake & Billet Tech Oil Catch Can
Reply With Quote
  #7  
Old 03-15-2016, 08:38 AM
Member
My Jeep: 2015 5.7L WK2
 
Join Date: Mar 2015
Location: western NY, USA
Posts: 281
Thanks: 0
Thanked 55 Times in 45 Posts
Rep Power: 6462
leadfoot4 has a reputation beyond reputeleadfoot4 has a reputation beyond reputeleadfoot4 has a reputation beyond reputeleadfoot4 has a reputation beyond reputeleadfoot4 has a reputation beyond reputeleadfoot4 has a reputation beyond reputeleadfoot4 has a reputation beyond reputeleadfoot4 has a reputation beyond reputeleadfoot4 has a reputation beyond reputeleadfoot4 has a reputation beyond reputeleadfoot4 has a reputation beyond repute
Re: Changed diff oil again, 24k on it.

Quote:
Originally Posted by GoPlzGo View Post
got it, yeah wet-clutch wear soups up the oil good...did in my 2-stroke motocross bikes, had to change every 5 rides or 1 day of motos.
While I won't necessarily disagree with you, let me provide another opinion....

The '15 GC Limited I have, is my first Jeep vehicle. My previous 4WD experience has been with 2 GM trucks, a '97 Chevy S-10 and an '05 GMC Canyon. Both had limited slip rear axles, and since I'm a "maintenance freak", both of them had the gear oil changed several times, during my ownership.

To my observation, I believe that GM, and possibly other gear vendors, use some sort of moly based lubricant in the initial assembly of their rear axles. I believe that this moly lube, is the primary cause for the darkened oil.

To my personal experience, the first oil change, at one year of use, shows dark grey oil coming out of the differential. The second change, at the second year of use, shows light grey oil, draining out, and after the third change, at the third year of use, the oil comes out pretty much the same color as it went in, therefore three changes is usually enough for the life of the vehicle.

Again, this isn't a hard, fast rule, just my opinion and observation, and FWIW, I've also found this to be true for the 2WD GM vehicles I've owned over the years. I just changed the lube in my Jeep, even though it has only 4500 miles, however, it's now 1 year old. The front diff oil was pretty much "clear", and the rear diff oil was somewhat "greyish". I bought enough gear oil to allow me to change the rear diff again, and since it's easy to do, I might change it again, in the near future, just to see how "discolored" it is, as well as to see if my pet theory is correct.
Reply With Quote
The Following User Says Thank You to leadfoot4 For This Useful Post:
  #8  
Old 03-18-2016, 07:15 AM
The Evil Twin's Avatar
Member
My Jeep: 2011 5.7L WK2
 
Join Date: Jan 2013
Location: Gainesville, VA
Posts: 684
Thanks: 37
Thanked 81 Times in 63 Posts
Rep Power: 440588
The Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond repute
Garage
Re: Changed diff oil again, 24k on it.

Not saying you are wrong about something in the factory fill, but I have never seen a molybdenum additive suitable for wet clutch use. Some LSD manufacturers specifically prohibit it.
Maybe initial wear in of the clutch plates?
Maybe from the cosmoline in the LSD? (metal protector, because you know they sit on shelves for ever)
__________________
#132-Motosylum Racing

2017 Sponsors: Amsoil, SHOEI, www.DC-MOTO.net, Woodcraft-CFM, VP Racing Fuels, www.MARRC.org
Amsoil 5w-20 synthetic meets Chrysler MS-6395 for my Jeep!
Reply With Quote
  #9  
Old 03-20-2016, 01:50 PM
Member
My Jeep: 2015 5.7L WK2
 
Join Date: Mar 2015
Location: western NY, USA
Posts: 281
Thanks: 0
Thanked 55 Times in 45 Posts
Rep Power: 6462
leadfoot4 has a reputation beyond reputeleadfoot4 has a reputation beyond reputeleadfoot4 has a reputation beyond reputeleadfoot4 has a reputation beyond reputeleadfoot4 has a reputation beyond reputeleadfoot4 has a reputation beyond reputeleadfoot4 has a reputation beyond reputeleadfoot4 has a reputation beyond reputeleadfoot4 has a reputation beyond reputeleadfoot4 has a reputation beyond reputeleadfoot4 has a reputation beyond repute
Re: Changed diff oil again, 24k on it.

Quote:
Originally Posted by The Evil Twin View Post
Not saying you are wrong about something in the factory fill, but I have never seen a molybdenum additive suitable for wet clutch use. Some LSD manufacturers specifically prohibit it.
Maybe initial wear in of the clutch plates?
Maybe from the cosmoline in the LSD? (metal protector, because you know they sit on shelves for ever)

OK, I'm certainly not an expert of diff manufacturing, so I'm simply going on observations. For example, my best friend had a Chevy van (he was an electrician, carried a lot of heavy crap around in it) with about 60K on the clock. He said the rear was "getting noisy". I asked if he had ever changed the oil in it, he said, "No", so I suggested we start there.

Long story short, the oil that came out was black as coal, even though it wasn't an LSD. My wife likes Jaguars. I was reading a TSB that said a batch of 2009 differentials, used in the model she has, were not cleaned properly, prior to assembly, and now were experiencing "issues".

I immediately did an differential oil change on her car. The rear is an "open" diff, and the oil came out clean, in other words, golden yellow in color. The car had about 24K on it, at the time. Previously, she had an '01 Jag, and I changed the diff oil in that car too. Open diff, clean oil, around 20K miles.

What I'm suggesting is, the domestic manufacturers are using something in their manufacturing process, that, over time, causes the oil to go black. I don't know for sure, just an observation....
Reply With Quote
  #10  
Old 03-21-2016, 08:15 PM
The Evil Twin's Avatar
Member
My Jeep: 2011 5.7L WK2
 
Join Date: Jan 2013
Location: Gainesville, VA
Posts: 684
Thanks: 37
Thanked 81 Times in 63 Posts
Rep Power: 440588
The Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond repute
Garage
Re: Changed diff oil again, 24k on it.

Oh, I don't doubt your observations. Don't get me wrong there. I'm shooting in the dark too.
__________________
#132-Motosylum Racing

2017 Sponsors: Amsoil, SHOEI, www.DC-MOTO.net, Woodcraft-CFM, VP Racing Fuels, www.MARRC.org
Amsoil 5w-20 synthetic meets Chrysler MS-6395 for my Jeep!
Reply With Quote
  #11  
Old 03-29-2016, 05:07 PM
Member
My Jeep: 2015 5.7L WK2
 
Join Date: Mar 2015
Location: western NY, USA
Posts: 281
Thanks: 0
Thanked 55 Times in 45 Posts
Rep Power: 6462
leadfoot4 has a reputation beyond reputeleadfoot4 has a reputation beyond reputeleadfoot4 has a reputation beyond reputeleadfoot4 has a reputation beyond reputeleadfoot4 has a reputation beyond reputeleadfoot4 has a reputation beyond reputeleadfoot4 has a reputation beyond reputeleadfoot4 has a reputation beyond reputeleadfoot4 has a reputation beyond reputeleadfoot4 has a reputation beyond reputeleadfoot4 has a reputation beyond repute
Re: Changed diff oil again, 24k on it.

Well, just for grins, since it was a decent day today, I decided to change the rear diff oil a second time. I put about 2-250 mils on the GC since I initially changed it. It was, as expected, a little grey, but nowhere as grey as the original oil that came out a few weeks ago. It will be interesting to see if it now remains somewhat "clearer".


What has me a little confused, however is the fluid capacity of the differentials, especially the rear one. The WKJeeps.com website, on their maintenance page, calls for 1.1 qts. of capacity for the front differential, and 1.4 qts. for the rear. So, in theory, 4 quarts should have done the job for me. I initially purchased 5 qts. of gear lube, just to be sure, and in reality used all but a few ounces of it, to change the front diff once, and the rear diff twice.

The front diff took barely 1 qt. and the two fills of the rear took almost 4 qts. Interesting, to say the least.......
Reply With Quote
  #12  
Old 03-29-2016, 07:51 PM
The Evil Twin's Avatar
Member
My Jeep: 2011 5.7L WK2
 
Join Date: Jan 2013
Location: Gainesville, VA
Posts: 684
Thanks: 37
Thanked 81 Times in 63 Posts
Rep Power: 440588
The Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond reputeThe Evil Twin has a reputation beyond repute
Garage
Re: Changed diff oil again, 24k on it.

That WK site is so wrong so often it seems. I've noted several mistakes. Hopefully you didn't follow their torque spec for the drain and fill plugs. They are twice the true spec.
Anyhoo, the rear 230 ELSD is 1.6 qt upon assembly and 1.5 for a service fill if you get it hot and let it drain for a while. The front is 1.2 qt for assembly and damn close to that for service fill. I have just shy of 0.5 qt left over (out of 3) for the last service.
Interested in what you find out!
__________________
#132-Motosylum Racing

2017 Sponsors: Amsoil, SHOEI, www.DC-MOTO.net, Woodcraft-CFM, VP Racing Fuels, www.MARRC.org
Amsoil 5w-20 synthetic meets Chrysler MS-6395 for my Jeep!
Reply With Quote
Reply

Thread Tools
Display Modes

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
MIL & P20EE again & again & again... echo7tango 2014+ Jeep Grand Cherokee Ecodiesel 3.0 561 05-24-2016 11:34 AM
Keyless ignition problems, again, and again. lee308 Trouble Shooting/Problems/Service 7 12-21-2014 04:12 PM
Keyless ignition problem again, and again.... lee308 Troubleshooting/Problems Discussion 1 10-18-2014 02:57 AM
Flat battery again..and again..and again..etc. spikelet Troubleshooting/Problems 4 07-15-2013 09:34 AM
on again, off again vibes wkcrdnick Suspension/Brakes/Wheels/Tires 1 05-18-2013 11:00 AM

» Premium Vendor Showcase
Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 01:48 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community

JeepGarage.org is in no way associated with or endorsed by FCA US LLC. Chrysler, Dodge, Jeep, Ram, Mopar and SRT are registered trademarks of FCA US LLC.