Diff synthetic oil change and gasket? - JKowners.com : Jeep Wrangler JK Forum
 
LinkBack Thread Tools Display Modes
post #1 of 22 Old 05-02-2011, 12:18 AM Thread Starter
Granite Guru
 
Join Date: Mar 2011
Age: 46
Posts: 454
Feedback: 0 reviews
Diff synthetic oil change and gasket?

I will be installing front diff cover/skid so I thought it would be a good idea to change gear oil in both front and rear. However, I saw on the forum people use 75w140 oil gear while manual calls for 75w90. So which one is better?

Second question, what do you use for the gasket when you change diff cover?
I climbed under my jeep today and noticed that both front and rear diffs are wet at the bottom (jeep only few months old), so I guess what ever gasket Chrysler used, doesn't work well. So what is better to use so the diff don't sip?

Thanks.
SFBayArea is offline  
Sponsored Links
Advertisement
 
post #2 of 22 Old 05-02-2011, 12:37 AM
Granite Guru
 
stevej21's Avatar
 
Join Date: Mar 2011
Age: 37
Posts: 127
Feedback: 1 reviews

On my '11, no gasket just silicone from factory. Thats how it went back together after my gear install. I've never used an actual gasket. Just make sure everything is super clean, and let it sit for a while before you add your gear oil to it.
I just put 75w90 back in it.
stevej21 is offline  
post #3 of 22 Old 05-02-2011, 12:45 AM
Super Moderator
 
StubEXrube's Avatar
 
Join Date: Jun 2008
Location: Austin Texas
Posts: 15,342
Garage
Feedback: 5 reviews

75/ 140wt is just a little added insurance, especially for those that tow, wheel hard, etc. I use 75/ 140 too. IMO either would be fine.

Either use RTV or LubeLocker preformed gasket. Make sure the mating surfaces are smooth and free of any rust, old RTV, etc. Use a razor blade if necessary.

Finger-tighten the cover-bolts in a criss-cross pattern and finish with appropriate wrench/ ratchet. Some recommend about 30-35 lb ft to torque. Just don't over-tighten.

Check for any drips or leaks and torque down a little more if necessary.

Poly Performance - Dynatrac - Currie - Goodyear - Poison Spyder - Warn - PSC - AEV - Reid Racing - Off-Road Evolution - Flowmaster - Delta - Riddler - Micky Thompson - Daystar - Skid Row - Uniden - Rebel Offroad - Firestik - Warrior Products - Viair - HiLift - ARB - Kicker - Infinity
StubEXrube is offline  
Sponsored Links
Advertisement
 
post #4 of 22 Old 05-02-2011, 12:56 AM
Rock God
 
toymaster's Avatar
 
Join Date: Feb 2011
Location: Clark, Wyoming
Age: 48
Posts: 1,152
Garage
Feedback: 2 reviews

^^^^^ I agree. Invest in a gasket scrapper and some carb cleaner. I've always just used RTV as well. Carb cleaner is not just for carbs ya' know Buy the cheapest Wal-mart has to offer and always keep a few cans around.

Quote:
Originally Posted by virtual_mage View Post
.....a dark forum, were people would sometimes be rude but yet be helpful.
JK 2dr rubi
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
toymaster is offline  
post #5 of 22 Old 05-02-2011, 07:19 AM
JKO Addict!
 
SoK66's Avatar
 
Join Date: May 2009
Location: Four Corners
Posts: 4,128
Feedback: 2 reviews

I use 80/90 in front, 85-140 rear. Good to go. Use a good quality RTV as a sealer, get the surfaces cleaned well with a scotchbrite pad & brake cleaner, wiped down with a lint free cloth. 1/4" bead of RTV, carefully mate & torque the cover bolts in a criss cross pattern to 30ft lbs. Wait about half a day, overnight is better, for the RTV to cure. Then fill, 2.7 pts in front (1.35 qts), 4.7 pts rear (2.35 qts.). If you don't have aftermarket covers with an elevated fill plug you'll have to get the last bit of oil in through the breather port on the housing. Don't just fill 'til it runs out the hole, you'll be short some oil.
SoK66 is offline  
post #6 of 22 Old 05-02-2011, 08:16 AM
Granite Guru
 
Join Date: Mar 2010
Age: 40
Posts: 153
Feedback: 0 reviews

I use lube lockers with my arb covers. They work awesome. Best thing is if u slam a rock hard with diff u wont lose seal like with regular rtv. I use 80-90 regular oil front and rear since I don't tow. I change 2-3 times a year. Is there any benefit to the heavier weight oil in rear if u don't tow?
Olean NY Jeeper is offline  
post #7 of 22 Old 05-02-2011, 09:58 AM Thread Starter
Granite Guru
 
Join Date: Mar 2011
Age: 46
Posts: 454
Feedback: 0 reviews

Quote:
Originally Posted by Olean NY Jeeper View Post
I use lube lockers with my arb covers. They work awesome. Best thing is if u slam a rock hard with diff u wont lose seal like with regular rtv. I use 80-90 regular oil front and rear since I don't tow. I change 2-3 times a year. Is there any benefit to the heavier weight oil in rear if u don't tow?
Lube lockers, is that something you can purchase in Autozone or Kragen?
SFBayArea is offline  
post #8 of 22 Old 05-02-2011, 10:05 AM
Super Moderator
 
StubEXrube's Avatar
 
Join Date: Jun 2008
Location: Austin Texas
Posts: 15,342
Garage
Feedback: 5 reviews

Quote:
Originally Posted by SFBayArea View Post
Lube lockers, is that something you can purchase in Autozone or Kragen?
Never seen them at any local AP stores. Plenty of vendors here, have them. Quadratec, Trail Duty. etc. No doubt that Marcus at RCO could hook you up with them too.

Poly Performance - Dynatrac - Currie - Goodyear - Poison Spyder - Warn - PSC - AEV - Reid Racing - Off-Road Evolution - Flowmaster - Delta - Riddler - Micky Thompson - Daystar - Skid Row - Uniden - Rebel Offroad - Firestik - Warrior Products - Viair - HiLift - ARB - Kicker - Infinity
StubEXrube is offline  
post #9 of 22 Old 05-02-2011, 10:09 AM Thread Starter
Granite Guru
 
Join Date: Mar 2011
Age: 46
Posts: 454
Feedback: 0 reviews

Quote:
Originally Posted by StubEXrube View Post
Never seen them at any local AP stores. Plenty of vendors here, have them. Quadratec, Trail Duty. etc. No doubt that Marcus at RCO could hook you up with them too.
Is this the staff you are talking about:
http://cgi.ebay.com/ebaymotors/Lube-...item1e60a4915e

So it is kind of like a gasket.
SFBayArea is offline  
post #10 of 22 Old 05-02-2011, 10:11 AM
Super Moderator
 
StubEXrube's Avatar
 
Join Date: Jun 2008
Location: Austin Texas
Posts: 15,342
Garage
Feedback: 5 reviews

Quote:
Originally Posted by SFBayArea View Post
Is this the staff you are talking about:
http://cgi.ebay.com/ebaymotors/Lube-...item1e60a4915e

So it is kind of like a gasket.
Yep. That's it. It IS a gasket. Works well and can be reused. I've used them on my JK and in the past on my TJ. No problems.

Poly Performance - Dynatrac - Currie - Goodyear - Poison Spyder - Warn - PSC - AEV - Reid Racing - Off-Road Evolution - Flowmaster - Delta - Riddler - Micky Thompson - Daystar - Skid Row - Uniden - Rebel Offroad - Firestik - Warrior Products - Viair - HiLift - ARB - Kicker - Infinity
StubEXrube is offline  
post #11 of 22 Old 05-02-2011, 10:14 AM Thread Starter
Granite Guru
 
Join Date: Mar 2011
Age: 46
Posts: 454
Feedback: 0 reviews

Quote:
Originally Posted by StubEXrube View Post
Yep. That's it. It IS a gasket. Works well and can be reused. I've used them on my JK and in the past on my TJ. No problems.
Almost $40 for this thing on ebay, sounds bit too much is it not?
SFBayArea is offline  
post #12 of 22 Old 05-02-2011, 10:38 AM
Super Moderator
 
StubEXrube's Avatar
 
Join Date: Jun 2008
Location: Austin Texas
Posts: 15,342
Garage
Feedback: 5 reviews

Quote:
Originally Posted by SFBayArea View Post
Almost $40 for this thing on ebay, sounds bit too much is it not?
That should be for 2. If not.....that's pretty high. Quadratec has them for $21.99 ea. Marcus might be able to get them even cheaper. Shoot him a PM.

Poly Performance - Dynatrac - Currie - Goodyear - Poison Spyder - Warn - PSC - AEV - Reid Racing - Off-Road Evolution - Flowmaster - Delta - Riddler - Micky Thompson - Daystar - Skid Row - Uniden - Rebel Offroad - Firestik - Warrior Products - Viair - HiLift - ARB - Kicker - Infinity
StubEXrube is offline  
post #13 of 22 Old 05-02-2011, 10:51 AM Thread Starter
Granite Guru
 
Join Date: Mar 2011
Age: 46
Posts: 454
Feedback: 0 reviews

Quote:
Originally Posted by StubEXrube View Post
That should be for 2. If not.....that's pretty high. Quadratec has them for $21.99 ea. Marcus might be able to get them even cheaper. Shoot him a PM.
Sorry, who is Marcus?
SFBayArea is offline  
post #14 of 22 Old 05-02-2011, 10:55 AM
Super Moderator
 
StubEXrube's Avatar
 
Join Date: Jun 2008
Location: Austin Texas
Posts: 15,342
Garage
Feedback: 5 reviews

Quote:
Originally Posted by SFBayArea View Post
Sorry, who is Marcus?
He owns RiverCityOffroad.

www.rivercityoffroad.com

He has a great reputation here on JKO for delivering product quickly, and many times cheaper than what others can do. Not sure if he carries the LubeLockers, but I would guess that he does, or could get them for you regardless.

Poly Performance - Dynatrac - Currie - Goodyear - Poison Spyder - Warn - PSC - AEV - Reid Racing - Off-Road Evolution - Flowmaster - Delta - Riddler - Micky Thompson - Daystar - Skid Row - Uniden - Rebel Offroad - Firestik - Warrior Products - Viair - HiLift - ARB - Kicker - Infinity
StubEXrube is offline  
post #15 of 22 Old 05-02-2011, 11:25 AM
JKO Addict!
 
Join Date: Nov 2009
Location: Tracy, California
Age: 39
Posts: 3,068
Feedback: 4 reviews

Quick info guys. the factory recomeneded weight is fine for stock or slightly moddified rigs. If you are running a deeper gear set with larger tires (5.13 with 37", etc) then go ahead and step up to the heavier oil. The deeper gear set gennerates a lot more heat especially with the larger tires and the rotated pinion angle reduces the amount of oil through the pinion bearings. The heavier oil has more of the critical additives and more heat resistance and will be bennificial. Synthetic vs Regular oil is your choice, if you tow or wheel hard synthetic may be for you, if not and you change oil regularly then standard oil should work fine.

United States Army 1997-Present

When a life or death decision must be made in seconds.....the police are only a minute away.
09rubicon is offline  
post #16 of 22 Old 05-02-2011, 02:03 PM
Granite Guru
 
offinthewoods's Avatar
 
Join Date: Jun 2010
Location: NNJ
Age: 45
Posts: 157
Garage
Feedback: 0 reviews

for those of us that live where its cold during the winter, is there any worry that running the heavier oil will have any detrimental effects during those months?

'08 no limit red rock rubi

MODS: Daystar dash panel - I've got a jeep, I'm invincible already....
offinthewoods is offline  
post #17 of 22 Old 05-02-2011, 05:02 PM
Wheeler
 
Join Date: May 2010
Location: Michigan
Posts: 18
Feedback: 0 reviews

I would recommend synthetic gear oil, especially for cold weather. I live in Michigan and used Amsoil 75w90 in the front and 75w140 in the rear. I also used the Lubelocker gaskets and have had no problems.
wheels082 is offline  
post #18 of 22 Old 05-02-2011, 06:12 PM
JKO Addict!
 
SoK66's Avatar
 
Join Date: May 2009
Location: Four Corners
Posts: 4,128
Feedback: 2 reviews

Use the heavier oil if you don't have to deal with prolonged cold. Factory recommendation of 80/90 front & rear. 75/140 rear recommended for towing. Bump that to 85/140 synthetic with meats & locker. Also, since the Jake has drain plugs on both pigs, change the fluid regularly.

Re: Lube Lockers, I had bad luck with them on my former rig w/Dynatrac 44/60 combination. Would not seal. Since the JK has the aforementioned drain plugs, just use RTV and be done with it.
SoK66 is offline  
post #19 of 22 Old 05-20-2011, 10:55 PM
JKO Addict!
 
desert dog's Avatar
 
Join Date: Dec 2009
Location: Oildale
Posts: 2,585
Garage
Feedback: 0 reviews

Just some food for thought, probably been posted before:

I used Royal Purple in my difs for a couple years. I was having problems with my rear RJ60 getting REALLY hot, to the point that water would sizzle a bit if it hit the dif. I called Currie and they told me to switch to conventional gear lube and that they highly recommend AGAINST using synthetics because it does not transfer heat as well as conventional oil. I switch to Dino oil, and to my surprise, I can hold my hand on the rear dif for several seconds after a long drive. Since then, a tech for Eaton told me that they also recommend conventional gear oil over synthetic for the same reason. Then I was surprised to find that a very respected off-road shop here in Cali will not warranty his gear installs if synthetic is used, claiming that the failure rate with synthetic is many times that of conventional gear lube.

Not the gospel obviously, but just something to consider especially with testing done by Currie and Eaton.

I would be interested in Dynatrac's take on this.
desert dog is offline  
post #20 of 22 Old 05-20-2011, 11:17 PM
Rock God
 
jrider's Avatar
 
Join Date: Aug 2010
Location: Boise, ID
Age: 43
Posts: 1,195
Feedback: 1 reviews

Quote:
Originally Posted by desert dog View Post
Just some food for thought, probably been posted before:

I used Royal Purple in my difs for a couple years. I was having problems with my rear RJ60 getting REALLY hot, to the point that water would sizzle a bit if it hit the dif. I called Currie and they told me to switch to conventional gear lube and that they highly recommend AGAINST using synthetics because it does not transfer heat as well as conventional oil. I switch to Dino oil, and to my surprise, I can hold my hand on the rear dif for several seconds after a long drive. Since then, a tech for Eaton told me that they also recommend conventional gear oil over synthetic for the same reason. Then I was surprised to find that a very respected off-road shop here in Cali will not warranty his gear installs if synthetic is used, claiming that the failure rate with synthetic is many times that of conventional gear lube.

Not the gospel obviously, but just something to consider especially with testing done by Currie and Eaton.

I would be interested in Dynatrac's take on this.

?????????? I've seriously re-read this thing like 8 times. I'm trying to come up with reasoning inline with what my education in synthetics. I'm having a hard time, but I am on my about 8th scotch. I'm not going into this now, wait till sober.
jrider is offline  
post #21 of 22 Old 05-21-2011, 01:56 AM Thread Starter
Granite Guru
 
Join Date: Mar 2011
Age: 46
Posts: 454
Feedback: 0 reviews

Both of my diffs were sweating oil, and to my surprise local dealer changed diff seals and diff oil under warranty. I asked them if they replaced it with synthetic gear oil, to my surprise they told me that synthetic is the only kind they use.
SFBayArea is offline  
post #22 of 22 Old 05-22-2011, 02:11 PM
JKO Addict!
 
desert dog's Avatar
 
Join Date: Dec 2009
Location: Oildale
Posts: 2,585
Garage
Feedback: 0 reviews

Currie says that using Synthetic in their axles voids the warranty. Richmond gear recommends against using synthetic too.

It made no sense to me either, until I experienced the temp difference myself?

Weird.
desert dog is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JKowners.com : Jeep Wrangler JK 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










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