Is gear oil the same as differential fluid?
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Joined: Feb 2002
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From: Southern California-Glendale
Is gear oil the same as differential fluid?
If it's not...does differential fluid have a specific weight that i need? Or is all differential fluid the same? And how much of it do i need? I tried to search but there wasn't much on 'differential fluid'
in slow, out fast!
Joined: Apr 2002
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From: Florida
if you look at the manual it says 75w90 for both. i know cause i just changed both last night at 1am. the guys at the store made my friend harrison pull out his manual to show them we werent stupid. we used royal purple.
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Joined: Feb 2002
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From: Las Vegas, NM
I am using Redline MTL in Tranny and ... and different diff fluid for the rear-end -- 75W90NS
"Red Line 75W90 and 80W140 Gear Oils already contain this additive. " this additive meaning " DIFFERENTIAL FRICTION MODIFIER & BREAK-IN ADDITIVE is a friction modifier --
Check for a real answer:
http://www.redlineoil.com/products.htm
:~) Steve
"Red Line 75W90 and 80W140 Gear Oils already contain this additive. " this additive meaning " DIFFERENTIAL FRICTION MODIFIER & BREAK-IN ADDITIVE is a friction modifier --
Check for a real answer:
http://www.redlineoil.com/products.htm
:~) Steve
Transmission gears roll across each other and thus do not need a high shear value lubricant.
Differential gears slide across each other and thus need a high shear value lubricant.
Shear value is not directly related to viscosity.
Transmissions also have synchro gears which require some friction to work properly.
That is why you should use different oils.
Differential gears slide across each other and thus need a high shear value lubricant.
Shear value is not directly related to viscosity.
Transmissions also have synchro gears which require some friction to work properly.
That is why you should use different oils.
Thread Starter
Senior Member
Joined: Feb 2002
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From: Southern California-Glendale
Oh I see, what I originally wanted to know was whether or not you fill them up separately. I thought gear oil/differential fluid were filled up from the same place. Thanks for all the in put
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WWFSMD
Joined: Jun 2001
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From: SoCal
Don't put Redline MTL or MT90 in your diff. The "MT" is for Manual Transmission, and it has a friction modifier that isn't intended for diffs. The FD has a Torsen diff that doesn't need any special LSD additives. Straight gear oil in the right weight and load rating is best.
The diff and tranny have separate oil reservoirs, so you can run different oils in them.
-Max
The diff and tranny have separate oil reservoirs, so you can run different oils in them.
-Max
Full Member
Joined: Jul 2001
Posts: 205
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From: Monterey Park, CA
Neo 75/90HD is good for both tranny and Diff.
It's amazing stuff.
http://www.neosyntheticoil.com/75w90hd.htm
Redline MTL in the tranny is bad news.
It's amazing stuff.
http://www.neosyntheticoil.com/75w90hd.htm
Redline MTL in the tranny is bad news.
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