Recent Topics
Lets Get a True Group 4 Sticky going!
by KMJ1992
06/19/18 12:17 PM
Rotella 10W40
by jakewells
06/19/18 10:43 AM
Extend WiFi Range at the Laptop?
by clarkflower
06/19/18 10:40 AM
Silicone containing waxes
by mjoekingz28
06/19/18 09:44 AM
Matrix totaled
by circuitsmith
06/19/18 08:32 AM
Door rust problems
by Dave Sherman
06/19/18 07:51 AM
2016 Honda Civic problems
by dbias
06/19/18 07:39 AM
Royal purple 75-140 in a subaru rear
by 91camarosRS
06/19/18 07:32 AM
OCI. With short trips. Nissan 4 liter
by Gawardawg
06/19/18 06:52 AM
Approach Watching on the Beach @ St Maarten ...
by LoneRanger
06/19/18 06:41 AM
Honda Accord Needs Shocks; Front, Back, or Both?
by tc1446
06/19/18 05:50 AM
How much oil does your oil filter hold?
by Snagglefoot
06/19/18 05:44 AM
better day
by mx5miata
06/19/18 05:26 AM
BRAVO to Officer Wheeles......
by Sayjac
06/19/18 05:17 AM
People Watching ....Airport style.
by ZZman
06/19/18 04:24 AM
Subaru's at play...
by OneEyeJack
06/19/18 03:50 AM
Treating a 2003 Jetta
by llmercll
06/19/18 01:41 AM
Brakes not working - brake pedal sinks
by tookien
06/19/18 12:42 AM
Dave thinks I can make it 12--15k
by Marco620
06/19/18 12:26 AM
'05 Impala front wheel "squeal". Cost !
by Lee4212
06/19/18 12:16 AM
Newest Members
JustaDude, 3horseman, Firedog45, WtsTacoma01, Orion62
65265 Registered Users
Who's Online
85 registered (Andy636, 853okg, 4WD, 2009Edge, 28oz, adamrc, 11 invisible), 1603 Guests and 48 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
65265 Members
67 Forums
285590 Topics
4766072 Posts

Max Online: 3590 @ 01/24/17 08:07 PM
Donate to BITOG
Topic Options
#4778812 - 06/06/18 07:23 AM Rear diff fluid question
bigdawglanecreek Offline


Registered: 06/05/18
Posts: 2
Loc: GA
2012 Jeep Grand Cherokee / 2wd / auto 5.7 hemi. The rear diff fluid needs changing and I am getting conflicting information. Not an ELSD and manual calls for Mopar 75w-85 synthetic, which is hard to find in the stores. They sell is for $45.00 per quart.

Will Mobile 1, 75w-90 full syn with friction modifier be ok to run in rear diff?

Thanks

Top
#4778828 - 06/06/18 07:47 AM Re: Rear diff fluid question [Re: bigdawglanecreek]
Char Baby Online   content


Registered: 05/25/05
Posts: 10018
Loc: ROCHESTER, NY
IMO, yes! The difference is too small between the two. Mobil 1's website may even have an application list for many vehicles and the site may even recommend their 75W90 LS for your JGC.
_________________________
"Retired"
'80 Firebird FORMULA V8/4bbl-purchased "NEW"
'06 Mazda 3i 2.0L
'15 Nissan Altima 2.5 SV

Top
#4778829 - 06/06/18 07:48 AM Re: Rear diff fluid question [Re: bigdawglanecreek]
zeng Offline


Registered: 09/01/15
Posts: 2187
Loc: Malaysia

Top
#4778835 - 06/06/18 08:00 AM Re: Rear diff fluid question [Re: bigdawglanecreek]
barkingspider Offline


Registered: 12/22/13
Posts: 2041
Loc: socal
You can get Delo syn 75w90 from autozone around $6/qt. It does not contain LS. Works perfect in my vehicles and the price is right
_________________________
06 Cadillac Escalade Ext
17 Cadillac ATS (wife)
05 Toyota Camry (daughter)
11 GMC Canyon off-road (daily)

Top
#4778845 - 06/06/18 08:16 AM Re: Rear diff fluid question [Re: bigdawglanecreek]
Char Baby Online   content


Registered: 05/25/05
Posts: 10018
Loc: ROCHESTER, NY
Well, unless your GC's differential actually requires synthetic gear lube, I bought PEAK 80W90 gear oil w/limited slip additive for ~ $15/gallon at PEP BOYS. I thought this was quite a deal at their regular price. It may be a slightly higher price now.

If you can use any regular(non syn) gear oil, I'd look online for the best price.
_________________________
"Retired"
'80 Firebird FORMULA V8/4bbl-purchased "NEW"
'06 Mazda 3i 2.0L
'15 Nissan Altima 2.5 SV

Top
#4778858 - 06/06/18 08:29 AM Re: Rear diff fluid question [Re: bigdawglanecreek]
Panzerman Offline


Registered: 12/16/06
Posts: 4203
Loc: Port Orange, Florida
75w 90 gear oil is the same stuff. Synthetic is important.
75w90 exceeds your manufacturer specifications.
People in warm climates that tow alot could even go to 75w120 synthetic oil.
Over thinking the whole thing like 5w20 v.s 5w30.
Like the difference between soda and lemonade.
_________________________

2006 Dodge Ram 2500 Hemi 4x4
2016 Dodge Challenger Scat Pack

Top
#4778860 - 06/06/18 08:31 AM Re: Rear diff fluid question [Re: bigdawglanecreek]
dlundblad Online   happy


Registered: 09/30/13
Posts: 10011
Loc: Indiana
The LSD additive in a non LSD diff won't hurt a thing. Since the manual calls for 75w90, I'd say it requires synthetic so I'd stick with it regardless.

Mobil 1, Synpower, Supertech, Delo etc. would work great here.
_________________________
03 Jeep WJ 4.0 199k Castrol Edge 10w40 HM Fram XG16
02 Volvo S60 2.4T 177k M1 0w40 Mahle OX149D
97 Chevy Blazer 4.3 145k Rotella T5 10w30 Fram TG3980


Top
#4778875 - 06/06/18 08:46 AM Re: Rear diff fluid question [Re: bigdawglanecreek]
bigdawglanecreek Offline


Registered: 06/05/18
Posts: 2
Loc: GA
Thanks for all the responses. It does call for GL-5 synthetic...probably go with Mobile 1 or Royal Purple.

Top
#4778878 - 06/06/18 08:48 AM Re: Rear diff fluid question [Re: bigdawglanecreek]
kschachn Online   content


Registered: 12/26/05
Posts: 9383
Loc: Upper Midwest
Definitely not Mobile 1. Use a known brand.
_________________________
1994 BMW 530i, 227K
1996 Honda Accord, 262K
1999 Toyota Sienna, 394K
2000 Toyota ECHO, 267K

Top
#4778894 - 06/06/18 09:09 AM Re: Rear diff fluid question [Re: bigdawglanecreek]
Lolvoguy Offline


Registered: 02/06/14
Posts: 2328
Loc: Canada
Agreed, Mobil 1 is far more reputable
_________________________
06 Lexus IS350- Wife
88 BMW 325is- Mistress
03 Suzuki SV650S- One night stand

Top
#4778898 - 06/06/18 09:19 AM Re: Rear diff fluid question [Re: Lolvoguy]
4WD Online   confused


Registered: 09/21/10
Posts: 6365
Loc: Texas
Originally Posted By: Lolvoguy
Agreed, Mobil 1 is far more reputable


Have used it in Eaton lockers for 20 years … I run it for 3 years/30k … but only dump it that often because it’s easy (aftermarket cover) and I cross flowing water periodically …

Top
#4778955 - 06/06/18 10:33 AM Re: Rear diff fluid question [Re: bigdawglanecreek]
dogememe Offline


Registered: 04/15/17
Posts: 597
Loc: SF BAY AREA, CA
Originally Posted By: bigdawglanecreek
Thanks for all the responses. It does call for GL-5 synthetic...probably go with Mobile 1 or Royal Purple.


As much as I like Royal Purple motor oil and filters I used their gear oil in a differential once and I really didn't like it. I'd stick with Valvoline, Mobil, or generic stuff (Supertech, Masterpro, etc)


Edited by dogememe (06/06/18 10:34 AM)
_________________________
2007 Ford Crown Vic P71 4.6 ~124K Miles, Valvoline SynPower 5W-30, Royal Purple Filter *Daily Driver*
2010 Ford Escape 2.5 ~70K Miles, Valvoline SynPower 5W-30, Wix Filter *Turo Rental Car*

Top
#4779151 - 06/06/18 01:55 PM Re: Rear diff fluid question [Re: bigdawglanecreek]
Gimpy1 Offline


Registered: 08/24/17
Posts: 106
Loc: Displaced Texan in Mexico City
Royal Purple made the diff in my GTO sound like a tin can full of rocks, it also caused the dreaded "one wheel peel" after having the diff blueprinted, rebuilt and a TurTrac added, my builder recommend Synthetic GL-5 and said Mobil 1 or any of the big name gear oils are fine, he also said Redline 75W140 NS (no FM) was some of the best out there. After shelling out $2800 bucks for a diff I decided to use Red Line 75W140 NS and 25 ml of "F" FM. I think you'll be fine with Mobil 1 but I can't recommend Royal Purple Gear oil based on my experience and my car, granted the GTO diff is a freak of nature cone type diff designed in the 60's for a freaking 6 cylinder Australian vehicle.


Edited by Gimpy1 (06/06/18 01:56 PM)

Top
#4780946 - 06/08/18 06:59 AM Re: Rear diff fluid question [Re: Lolvoguy]
Char Baby Online   content


Registered: 05/25/05
Posts: 10018
Loc: ROCHESTER, NY
Originally Posted By: kschachn
Definitely not Mobile 1. Use a known brand.
Originally Posted By: Lolvoguy
Agreed, Mobil 1 is far more reputable


Mixed feelings here?
_________________________
"Retired"
'80 Firebird FORMULA V8/4bbl-purchased "NEW"
'06 Mazda 3i 2.0L
'15 Nissan Altima 2.5 SV

Top