You're correct. I also read something about the additives in the GL5 that doesn't like yellow metal.
However, I've also read that today's GL5 'MAY' contain different additives for the extreme wear protection that's compatible in the transmissions.
Quote:
Originally Posted by Jhill
The gl5 can eat the yellowing in the syncros but it has to be at an extremely high temp (I forget the exacts) so as long as your not beating on it or towing you should be ok a bit but I would change it ASAP.
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