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Redline 75w90 NS in rear differential? #4727731
04/15/18 12:08 PM
04/15/18 12:08 PM
Joined: Aug 2004
Posts: 366
San Diego
FlyPenFly Offline OP
FlyPenFly  Offline OP

Joined: Aug 2004
Posts: 366
San Diego
Just bought a Suzuki Grand Vitara 2006 that is RWD with 130k. About to change out the diff oil. I have some left over bottles of 75w90 NS Redline that I could use and it is GL-5. However, these were designed for manual transmissions and not optimized for diffs like their regular 75w90. What do you guys think? Pony up the $20 for the normal diff oil or just use the perfectly good oil I have?


2014 Mercedes GLK350 3.5L DFI
2014 Mercedes E350 Coupe 3.5L DFI
2010 Audi A4 2.0T
Re: Redline 75w90 NS in rear differential? [Re: FlyPenFly] #4727741
04/15/18 12:20 PM
04/15/18 12:20 PM
Joined: May 2012
Posts: 2,445
The land of USA-made Subies!
SubieRubyRoo Offline
SubieRubyRoo  Offline

Joined: May 2012
Posts: 2,445
The land of USA-made Subies!
Motul Gear 300 would be my choice. Keep the NS for a transaxle like it's intended.JMHO

Re: Redline 75w90 NS in rear differential? [Re: FlyPenFly] #4727742
04/15/18 12:21 PM
04/15/18 12:21 PM
Joined: Jun 2012
Posts: 1,822
USA
oldhp Offline
oldhp  Offline

Joined: Jun 2012
Posts: 1,822
USA
Call RedLine and ask for Dave. He is the best tech there.


2018 RAM 1500 3.6/8 speed.
2017 Jeep Sahara Unlimited 3.6
"U kan't fixe it......if'n it ain't broke."
Re: Redline 75w90 NS in rear differential? [Re: FlyPenFly] #4727743
04/15/18 12:22 PM
04/15/18 12:22 PM
Joined: Aug 2003
Posts: 13,418
NE,Ohio
Rand Offline
Rand  Offline

Joined: Aug 2003
Posts: 13,418
NE,Ohio
It would be fine.. its a 75w90 gl-5 gear oil.

You might lose a tiny fraction of a mpg.

so if you have no future use for the 75w90NS.. I would use it.

otherwise a name brand syn 75w90 gl-5 would be good.


2019 Jeep Cherokee Trailhawk 2.0T
Re: Redline 75w90 NS in rear differential? [Re: FlyPenFly] #4727780
04/15/18 12:45 PM
04/15/18 12:45 PM
Joined: Dec 2013
Posts: 2,099
socal
barkingspider Offline
barkingspider  Offline

Joined: Dec 2013
Posts: 2,099
socal
Use it


06 Cadillac Escalade Ext
17 Cadillac ATS (wife)
05 Toyota Camry (daughter)
11 GMC Canyon off-road (daily)
Re: Redline 75w90 NS in rear differential? [Re: FlyPenFly] #4727879
04/15/18 02:48 PM
04/15/18 02:48 PM
Joined: Aug 2017
Posts: 196
Displaced Texan in Mexico City
Gimpy1 Offline
Gimpy1  Offline

Joined: Aug 2017
Posts: 196
Displaced Texan in Mexico City
The only difference is that the NS has no friction modifier so if ur diff doesn't require it or is a true Trac it's fine as long as it's the specd weight

Re: Redline 75w90 NS in rear differential? [Re: SubieRubyRoo] #4728023
04/15/18 05:15 PM
04/15/18 05:15 PM
Joined: Jan 2009
Posts: 6,800
New England
gathermewool Offline
gathermewool  Offline

Joined: Jan 2009
Posts: 6,800
New England
Use it. Perfectly fine.

Originally Posted By: SubieRubyRoo
Motul Gear 300 would be my choice. Keep the NS for a transaxle like it's intended.JMHO


Agreed, BUT:

The OP already has thr RL GL.


'14 Forester XT FA20DIT (Cobb Stage 1)
Edge 0W-40 + FU filter (64,774 miles)
'15 Legacy FB25 (OEM Stage, uh, neg. 7?)
Edge 0W-20 + FU filter (40,803 miles)
Re: Redline 75w90 NS in rear differential? [Re: FlyPenFly] #4728082
04/15/18 05:57 PM
04/15/18 05:57 PM
Joined: May 2012
Posts: 2,445
The land of USA-made Subies!
SubieRubyRoo Offline
SubieRubyRoo  Offline

Joined: May 2012
Posts: 2,445
The land of USA-made Subies!
Gather, I agree, but he also closed his post with a willingness to buy another fluid. So, I recommended the Gear 300 which is one of the highest-rated 75W90s and has the highest VI, along with really good UOAs on the applications its been used in.

OP could certainly use it if he absolutely wanted to, no argument there. But if he's willing to spend another $20, Gear 300 is likely among the best choices he could make.

Re: Redline 75w90 NS in rear differential? [Re: FlyPenFly] #4728175
04/15/18 07:23 PM
04/15/18 07:23 PM
Joined: Jan 2009
Posts: 6,800
New England
gathermewool Offline
gathermewool  Offline

Joined: Jan 2009
Posts: 6,800
New England
Gotcha. Iíve used it in the past and have got a stash of Gear 300 for use in my current Subies.

Definitely seems to be the best gear oil, at least on paper.


'14 Forester XT FA20DIT (Cobb Stage 1)
Edge 0W-40 + FU filter (64,774 miles)
'15 Legacy FB25 (OEM Stage, uh, neg. 7?)
Edge 0W-20 + FU filter (40,803 miles)
Re: Redline 75w90 NS in rear differential? [Re: FlyPenFly] #4731161
04/18/18 03:32 PM
04/18/18 03:32 PM
Joined: Aug 2004
Posts: 366
San Diego
FlyPenFly Offline OP
FlyPenFly  Offline OP

Joined: Aug 2004
Posts: 366
San Diego
Sorry, it's for a 2007 although I think they're almost the same as a 2006.

It seems like the NS is slightly less slippery, I hope that doesn't make a difference in use on a plain old rear differential.


2014 Mercedes GLK350 3.5L DFI
2014 Mercedes E350 Coupe 3.5L DFI
2010 Audi A4 2.0T
Re: Redline 75w90 NS in rear differential? [Re: FlyPenFly] #4733160
04/20/18 01:42 PM
04/20/18 01:42 PM
Joined: Aug 2004
Posts: 366
San Diego
FlyPenFly Offline OP
FlyPenFly  Offline OP

Joined: Aug 2004
Posts: 366
San Diego
In case someone googles this later, I asked Redline directly

Quote:
Thank you for contacting Red Line Oil, in your Grand Vitara rear differential the 75W90NS would be an option and could be used without an additional friction modifier where a clutch type limited slip isnít fitted.


2014 Mercedes GLK350 3.5L DFI
2014 Mercedes E350 Coupe 3.5L DFI
2010 Audi A4 2.0T
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