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#3130837 - 09/20/13 03:40 PM UOA for transaxle oil
VinceF Offline


Registered: 10/25/08
Posts: 95
Loc: Phila, Pa.
Anybody had it done it?

Thinking of having mine tested to see what is going on, to see if the GL5 oil is affecting the trans and syncros. I've read many things like they have deactivators for the EP adds that protect yellow metals, or they only put enough of the adds in to not hurt them too much, so a compromise, or the adds only cause problems when the oil gets over 250 deg.

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#3130918 - 09/20/13 06:08 PM Re: UOA for transaxle oil [Re: VinceF]
MolaKule Offline


Registered: 06/05/02
Posts: 14659
Loc: Midwest
What vehicle and year?

GL-5 specific Diferential fluids should only be used in a differential.

Is this a Subaru driveline system? There are specific GL-5/GL-4 fluids for vehicles such as the Subaru because of a common sump system.

All manual transmission and differential fluids have deactivator chemistry.


Edited by MolaKule (09/20/13 06:13 PM)
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#3131152 - 09/20/13 11:16 PM Re: UOA for transaxle oil [Re: VinceF]
SubLGT Offline


Registered: 01/31/06
Posts: 1815
Loc: Idaho

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#3131382 - 09/21/13 08:15 AM Re: UOA for transaxle oil [Re: MolaKule]
VinceF Offline


Registered: 10/25/08
Posts: 95
Loc: Phila, Pa.
Originally Posted By: MolaKule
What vehicle and year?

GL-5 specific Diferential fluids should only be used in a differential.

Is this a Subaru driveline system? There are specific GL-5/GL-4 fluids for vehicles such as the Subaru because of a common sump system.

All manual transmission and differential fluids have deactivator chemistry.


Yes, I have an 07' 5sp NA Subaru Impreza, that I don't use a lot. Using Subaru's Extra-S gear oil in both the front transaxle and rear. Don't want to be using anything that could cause a problem. Rather get the Right Stuff if there is one. Seems hard to find out, and conflicting info. So far things seem good, and hope they stay that way.

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