GL5 or GL4 in front/center diff on a Tip?
09-21-2006, 12:07 AM
#1
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GL5 or GL4 in front/center diff on a Tip?
Is it safe to dump some Redline 75w-90 GL5 in to the front/center diff in a Tiptronic? Or should I play it safe and use the dual GL4/GL5 rated RoyalPurple insted?
No def answers in the past.
No def answers in the past.
09-21-2006, 03:15 AM
#2
I used the Audi fluid in my diff, no sense in taking chances, but if you really want an alternative
I would stick with the royal purple, i've used it in my quattros in the past and had no ill effects.
-Richard
-Richard
09-21-2006, 03:40 AM
#3
GL4 is required for syncros, but since there are none, GL5 is probably fine. I'd check...
...the owner's manual. It should give you a spec for both the front diff and the center diff, but I believe that all three diffs take GL5.
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09-21-2006, 04:26 PM
#8
GL-5 for diffs. GL-4 for manual trans. Dual-rated gear oil goes in either. ATF for auto trans.
The only reason not to use GL-5 in trans is shift feel and syncro life from poor engagment, it will however help gear whining in a damaged trans. GL-5 will not corrode yellow metals, brass and bronze syncros. That is an old issue and since then only de-activated sulphur additives are in use in gear lubes.
04-29-2015, 04:39 AM
#9
AudiWorld Senior Member
Tiptronic differential fluids - GL-4 or GL-5
The only reason not to use GL-5 in trans is shift feel and syncro life from poor engagment, it will however help gear whining in a damaged trans. GL-5 will not corrode yellow metals, brass and bronze syncros. That is an old issue and since then only de-activated sulphur additives are in use in gear lubes.
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