Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB - View Single Post - Motul Gear Competition 75W-140 in Transmission and Diff

JBezugs · 03-14-2018, 04:46 PM

EDIT: Mods I realized I posted this in the wrong forum, I have now posted it in the maintenance sub forum. Feel free to delete if desired.

Hey guys,

About a month and a half ago I went to a local performance shop to swap out the factory fill of trans and diff fluid for something a bit better (at about 18k kms).

I know that many in the community use Motul Gear 300, so when my mechanic recommended Gear Competition I really didn't think twice about it. He said its his go to recommendation for Subaru's (WRX's, STI's BRZ's and FRSes) and has used it many times in the past so I trusted his word.

Now upon doing more research about it, I am getting worried that I may be doing harm to my trans/diff. Should I flush and fill with a 75W-90?

03-14-2018, 04:46 PM	#1
JBezugs Good Job Subaru! Join Date: Mar 2016 Drives: '17 BRZ, '24 CX-50 Location: Toronto, Ontario, Canada Posts: 353 Thanks: 146 Thanked 334 Times in 156 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	Motul Gear Competition 75W-140 in Transmission and Diff EDIT: Mods I realized I posted this in the wrong forum, I have now posted it in the maintenance sub forum. Feel free to delete if desired. Hey guys, About a month and a half ago I went to a local performance shop to swap out the factory fill of trans and diff fluid for something a bit better (at about 18k kms). I know that many in the community use Motul Gear 300, so when my mechanic recommended Gear Competition I really didn't think twice about it. He said its his go to recommendation for Subaru's (WRX's, STI's BRZ's and FRSes) and has used it many times in the past so I trusted his word. Now upon doing more research about it, I am getting worried that I may be doing harm to my trans/diff. Should I flush and fill with a 75W-90? __________________ My (no longer Green) 2017 BRZ Build Thread Last edited by JBezugs; 03-14-2018 at 07:57 PM.