Motul gear 300 or Redline MT90? - Page 2 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Nardi330 · 11-10-2012, 07:20 AM

Does the change of diff oil to Motul Gear 300 make the LSD rougher than stock?

I changed to Redline 75w90NS recently and it's not as smooth as stock in low speed turns. Since Gear 300 is also without fiction modifier like the Redline 75w90NS, I wonder if its rough like Redline. If not I might replace Redline with Gear 300.

BMWDavid · 11-10-2012, 09:36 AM

Since the limited slip in our cars is a Torsen unit and works with gears not a clutch pack...the presence/or not of a friction modifier should not have any effect on the operation of the limited slip in the BRZ/FR-S's.

Nardi330 · 11-10-2012, 04:12 PM

Quote:

Originally Posted by BMWDavid

Since the limited slip in our cars is a Torsen unit and works with gears not a clutch pack...the presence/or not of a friction modifier should not have any effect on the operation of the limited slip in the BRZ/FR-S's.

That's what I thought too so I bought the Redline 75w90NS (no fiction modifier) but its now rough at low speed. I'm lost....

Guillaume · 11-10-2012, 05:30 PM

MT90 did wonders in my 6-speed Aisin equipped Miata.

gmookher · 11-10-2012, 05:36 PM

Quote:

Originally Posted by Nardi330

That's what I thought too so I bought the Redline 75w90NS (no fiction modifier) but its now rough at low speed. I'm lost....

go to motul 300, tracks great. quiet. ester based 100% synth

tonystewart · 11-10-2012, 06:03 PM

Red Line 75W85 in diff

FreshFRS · 11-10-2012, 07:53 PM

i've got redline lightweight shockproof in my diff and transmission at the moment its working extremely well. though due to it liking metal i had my tranny flushed out and cleaned my diff out as well before adding the shockproof.

Nardi330 · 11-10-2012, 08:24 PM

Quote:

Originally Posted by Guillaume

MT90 did wonders in my 6-speed Aisin equipped Miata.

That's what I have in the gearbox. Seems to be good but I need more miles to confirm.

Quote:

Originally Posted by gmookher

go to motul 300, tracks great. quiet. ester based 100% synth

Seriously consider doing this now but I'll give the redline a few more days and see.

Quote:

Originally Posted by tonystewart

Red Line 75W85 in diff

Smooth?

Quote:

Originally Posted by FreshFRS

i've got redline lightweight shockproof in my diff and transmission at the moment its working extremely well. though due to it liking metal i had my tranny flushed out and cleaned my diff out as well before adding the shockproof.

I heard bad things about shock proof so I guess I'd try Motul first. Thanks for your comment tho.

tonystewart · 11-10-2012, 08:27 PM

Very smooth

Nardi330 · 11-10-2012, 08:33 PM

Quote:

Originally Posted by tonystewart

Very smooth

Thx. I guess maybe our diff needs fiction modifier.

gmookher · 11-10-2012, 08:46 PM

Quote:

Originally Posted by Nardi330

Thx. I guess maybe our diff needs fiction modifier.

Negative. We use a torsen. They are unaffected by FM. Thats for clutch packs.

I stopped using the redline stuff in my car after it was overheating on the track, even the MT-90 in my M3 tranny...good luck to you guys. Overheating is easy to read, increased solubles, and half the content..no thanks, but g'head in your car, not in mine.

Please remember its a racing fluid, group 3 base stock based. You know what that means.

AZP Installs · 11-12-2012, 08:36 PM

As No Limit Motorsports said, the Motul Gear 300 works great in both the regular Subaru Transmissions as well as the BRZ/FRS units. We've installed quite a bit of it and it runs wonderful. We carry Redline products but over the years it has had very variable quality control. I since learned that RL doesn't produce their oils but re-brand other ones.

We also have used the Amsoil and love their gear and motor oils as well. You can't go wrong with either Motul or Amsoil in our book. We've been tracking and road racing subies for 10+ years using these fluids.

-Mike Paisan

11+ Years Maintaining, Modifying and Educating TriState Subaru Enthusiasts.
Call directly as We carry almost every manufacturer now, so before you buy parts call us.
Like us on Facebook! | E-mail: sales@azpinstalls.com | 725 Fairfield Ave | Kenilworth, NJ 07033 | 908.248.AZP1 (2971) | T-1 Certified Amsoil Direct Jobber |AIM: AZP Installs
"Race Tested, Enthusiast Approved!"

Nardi330 · 11-12-2012, 09:07 PM

will be picking up some Motul Gear 300 75w90 in an hour and will replace the Redline 75w90NS which was put in last Friday. the roughness hasn't gone away so the car is now in the garage until Motul goes in just to make sure i don't cause any more damage.....

shu5892001 · 11-12-2012, 11:42 PM

Quote:

Originally Posted by M1K3

Yes I like:

+1

View Poll Results: Motul gear 300 or Redline MT90 for transmission & Differential?
Motul gear 300	192	71.64%
Redline MT90	76	28.36%
Voters: 268. You may not vote on this poll

11-10-2012, 09:36 AM	#16
BMWDavid Senior Member Join Date: Feb 2012 Drives: '89 911, '06 GTI, '13 BRZ Location: USA Posts: 313 Thanks: 40 Thanked 62 Times in 40 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Since the limited slip in our cars is a Torsen unit and works with gears not a clutch pack...the presence/or not of a friction modifier should not have any effect on the operation of the limited slip in the BRZ/FR-S's. __________________ 2005 Honda XR650L 1989 Porsche Carrera 3.2 Coupe 2006 VW GTI/DSG 2013 Subaru BRZ WRB Limited 6MT-gone but not forgotten 2014 Nissan Murano SV

11-10-2012, 06:03 PM	#20
tonystewart Senior Member Join Date: May 2012 Drives: 2013 Scion FR-S Raven Location: Lake Worth Florida Posts: 1,181 Thanks: 76 Thanked 366 Times in 252 Posts Mentioned: 13 Post(s) Tagged: 1 Thread(s)	Red Line 75W85 in diff __________________ May'12 AT Raven, OFT V2, Perrin IntakeTube, Pulley & Overpipe,HKS Snorkel,FA20 EL Header,Nameless Frontpipe w/ Helmholtz, Crawford AOS, Cusco O2W Cooler, Grimmspeed Strut/MC Brace, Winjets w/D2S 3.0 HID by Illuminating Lighworkx, Fogs w/EU Stalk, LED's, JDM UnderPanels, Diffuser, Rigid Collars, Whiteline, HVT Camber Plates, Koni's, Swift Springs, GTSpec LCA, SPC Toearms, DBA 4K T-Slot Rotors, Ferodo DS2500, Vorshlag BrakeLines, MichelinPSS, 5Axis Wing, Raammat, Ensolite, JPM Coachworks, OEM+Ref400, 20mmspacers, TOMS

11-10-2012, 08:27 PM	#23
tonystewart Senior Member Join Date: May 2012 Drives: 2013 Scion FR-S Raven Location: Lake Worth Florida Posts: 1,181 Thanks: 76 Thanked 366 Times in 252 Posts Mentioned: 13 Post(s) Tagged: 1 Thread(s)	Very smooth __________________ May'12 AT Raven, OFT V2, Perrin IntakeTube, Pulley & Overpipe,HKS Snorkel,FA20 EL Header,Nameless Frontpipe w/ Helmholtz, Crawford AOS, Cusco O2W Cooler, Grimmspeed Strut/MC Brace, Winjets w/D2S 3.0 HID by Illuminating Lighworkx, Fogs w/EU Stalk, LED's, JDM UnderPanels, Diffuser, Rigid Collars, Whiteline, HVT Camber Plates, Koni's, Swift Springs, GTSpec LCA, SPC Toearms, DBA 4K T-Slot Rotors, Ferodo DS2500, Vorshlag BrakeLines, MichelinPSS, 5Axis Wing, Raammat, Ensolite, JPM Coachworks, OEM+Ref400, 20mmspacers, TOMS

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11-10-2012, 07:20 AM	#15
Nardi330 Senior Member Join Date: Sep 2011 Drives: 86 Location: Brisbane Australia Posts: 2,168 Thanks: 287 Thanked 374 Times in 264 Posts Mentioned: 9 Post(s) Tagged: 1 Thread(s)	Does the change of diff oil to Motul Gear 300 make the LSD rougher than stock? I changed to Redline 75w90NS recently and it's not as smooth as stock in low speed turns. Since Gear 300 is also without fiction modifier like the Redline 75w90NS, I wonder if its rough like Redline. If not I might replace Redline with Gear 300.

11-10-2012, 05:30 PM	#18
Guillaume Senior Member Join Date: Jul 2012 Drives: Exige S 240 Location: Belgium Posts: 732 Thanks: 319 Thanked 602 Times in 287 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	MT90 did wonders in my 6-speed Aisin equipped Miata.

11-12-2012, 08:36 PM	#26
AZP Installs Join Date: Oct 2011 Drives: '11 STi->'14 BRZ \| '14 Touareg TDi Location: Kenilworth, NJ Posts: 1,269 Thanks: 359 Thanked 557 Times in 371 Posts Mentioned: 49 Post(s) Tagged: 0 Thread(s)	As No Limit Motorsports said, the Motul Gear 300 works great in both the regular Subaru Transmissions as well as the BRZ/FRS units. We've installed quite a bit of it and it runs wonderful. We carry Redline products but over the years it has had very variable quality control. I since learned that RL doesn't produce their oils but re-brand other ones. We also have used the Amsoil and love their gear and motor oils as well. You can't go wrong with either Motul or Amsoil in our book. We've been tracking and road racing subies for 10+ years using these fluids. -Mike Paisan 11+ Years Maintaining, Modifying and Educating TriState Subaru Enthusiasts. Call directly as We carry almost every manufacturer now, so before you buy parts call us. Like us on Facebook! \| E-mail: sales@azpinstalls.com \| 725 Fairfield Ave \| Kenilworth, NJ 07033 \| 908.248.AZP1 (2971) \| T-1 Certified Amsoil Direct Jobber \|AIM: AZP Installs *"Race Tested, Enthusiast Approved!"*

11-12-2012, 09:07 PM	#27
Nardi330 Senior Member Join Date: Sep 2011 Drives: 86 Location: Brisbane Australia Posts: 2,168 Thanks: 287 Thanked 374 Times in 264 Posts Mentioned: 9 Post(s) Tagged: 1 Thread(s)	will be picking up some Motul Gear 300 75w90 in an hour and will replace the Redline 75w90NS which was put in last Friday. the roughness hasn't gone away so the car is now in the garage until Motul goes in just to make sure i don't cause any more damage.....

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