Oh Hot Damn!! This just blew my mind with facts.
Thank you!
Quote:
Originally Posted by venturaII
Gear 300 is GL5 rated, which while acceptable in the 86's differential, it is not acceptable for the transmission. Other FWD Subaru's do require GL5 in their transaxles due to the incorporation of a differential (hypoid gears) into the unit, but our transmission does not have this.
That's not to say Gear 300 will immediately make your transmission explode. You could probably use olive oil for a while and get away with it. However, the additives which make the oil GL5 rated also have a detrimental long term effect on the yellow metals used in any transmission designed around GL3/4 oils, which includes ours.
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