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Registered
Join Date: Sep 2009
Location: North of You
Posts: 9,160
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For Lubey: GL-5 in a GL-4 Transmission?
There are so many opinions on the internet, not sure who is correct. Some people claim GL-5 damages 'yellow metal', i.e. synchros. Some people say it makes no difference, GL-5 can go in a GL-4 gearbox with no issues.
so, is it okay to 'upgrade' and old manual transmission and use GL-5 when GL-4 is called out in the service manual? I'm pretty sure I have a GL-5 in my '89 911 and I suspect GL-5 did not exist in 1989, but this question for an older VW Jetta.
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"A machine you build yourself is a vote for a different way of life. There are things you have to earn with your hands." |
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04-25-2017, 10:46 AM
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Control Group
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GL 5 is not an upgrade, it is for differentials. GL4 in the transmission/transaxle
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04-25-2017, 12:40 PM
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Registered
Join Date: Sep 2009
Location: North of You
Posts: 9,160
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I have read that, so why is Swepco 201 often the recommended oil for a 915 and a G50?
Swepco 201 is GL-5.
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"A machine you build yourself is a vote for a different way of life. There are things you have to earn with your hands." Last edited by 1990C4S; 04-25-2017 at 02:35 PM.. |
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04-25-2017, 02:26 PM
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Almost Banned Once
Join Date: Feb 2009
Location: Adelaide South Australia
Posts: 38,278
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Actually Swepco 201 is not recommended for a G50.
For an older VW I'd use the genuine VW gearbox oil from a dealer. I know that may seem redundant but after years of experience It's the one oil I've found to works with no issues.
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04-25-2017, 05:51 PM
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2004 Mazda Miata
