OEM transmission fluid
Senior Member
Joined: Jul 2011
Posts: 1,021
Likes: 1
From: Illinois
Vehicle: 2010 Genesis Coupe 2L track
I read something about the GL5 and brass that's not good. Or maybe the GL-4 and brass. Either way they are not interchangeable. My trans takes GL-4 and the rear end takes GL-5.
Senior Member
Joined: Dec 2008
Posts: 3,837
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From: Floating around the AUDM
Vehicle: X3 Sprint, S-Coupe Turbo
There was a thread on here about it, it involved the word hypoid and some lenghty paragraphs.
The moral of the story is not to use GL-5 in a transmission that needs GL-4. Like it's actually bad for your tranny.
The moral of the story is not to use GL-5 in a transmission that needs GL-4. Like it's actually bad for your tranny.