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| Mechanical Maintenance (Oil, Fluids, Break-In, Servicing) Everything related to the mechanical maintenance of the FR-S and BRZ |
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03-14-2018, 07:52 PM
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#1 |
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Good Job Subaru!
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Motul Gear Competition 75W-140 in Transmission and Diff
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?
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03-14-2018, 08:32 PM
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#2 |
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Senior Member
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Oh, I wouldn't bother. As long as your transmission shifts OK, it should be fine. I don't think your differential cares one way or another.
humfrz |
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03-17-2018, 11:59 AM
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#3 |
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I use the 75w-140 in my diff but I have an clutch plate LSD and not the stock diff.
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03-18-2018, 06:07 PM
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#4 |
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Only users lose drugs.
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Wrong API rating (GL5) and twice as thick as needed. But it's up to you, as far as who you believe about transmission lube specs - some local wrench or the factory.
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Last edited by venturaII; 03-19-2018 at 01:06 PM. |
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