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Old 02-23-2004, 05:45 PM   #1
Sufficiently Sharky
Member#: 55173
Join Date: Feb 2004
Chapter/Region: MAIC
Location: I beat up big rocks
with paddles.

Question front diff/tranny and rear diff using different oils

Would I have any problems changing the manunal tranny/front diff oil to synthetic (along with engine to Mobile 1) and NOT changing other oils/lubes like rear diff? (2004 WRX)
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Old 02-23-2004, 06:30 PM   #2
Sports Wagon
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Join Date: Sep 2003
Location: Think with your Dipstick

Wrong forum. Why would you change the front and not the rear?
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Old 02-23-2004, 07:01 PM   #3
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Join Date: Mar 2002
Chapter/Region: SCIC
Location: Oceanside, CA
2008 God's Gift to
Turbo Wagons (MS3)


I changed my rear diff (Redline 75w90) and engine (Mobil1 5w30) to synthetic, but balked at changing the tranny oil because so many people seem to have troubles with the synchros with synthetic oils.

My plan WAS to do Redline 75w90NS. Now I have 5 quarts of it mocking me.
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Old 02-23-2004, 09:43 PM   #4
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2007 G35S 6MT
2008 ML550


As long as they are in the right viscosity range for the application, you should be fine with different oils.
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