<VV> GL-5 gear oil is for automatics?

[Charlie]

Is it possible that GL-5 gear oil is for automatics, and since 99% of
"average" cars are auto, it's "safe" to recommend it, since so few are NOT
auto, there are not enough of us to be a problem for them?

Just sayin' ...

Charlie


-----Original Message-----
From: VirtualVairs [mailto:virtualvairs-bounces at corvair.org] On Behalf Of
Sethracer--- via VirtualVairs
Sent: Tuesday, April 07, 2015 12:38 PM
To: virtualvairs at corvair.org
Subject: <VV> My final gear oil note - can't speak for others!

Randy writes:
"Ok, guys........after all the hubbub and crap going on about the CORRECT
tranny/gear lube for our Corvairs,  as an Amsoil dealer, I finally called
them and talked at length to a tech rep.  It seems about everyone on here
and their info is pretty much full of crap.  . . .  As far as  Amsoil is
concerned, GL - 5 is the only gear lube to use!!!!!!!  It  won't hurt a
thing!" 
 
So Seth writes:
That is the great thing about a religion, in can justify almost anything.  
<grin>
 
But, seriously, Randy - Amsoil lists their own GL4 lube. Here are their
listed "benefits": (Note #3)
 
Promotes Longevity in Front-Wheel-Drive  Transaxles Synthetic Manual
Transmission Gear Lube meets 75W/80W-90  viscosity requirements and exceeds
API GL-4 performance requirements for many front-wheel-drive vehicles. Its
excellent gear protection, extreme-temperature performance and durability
promote maximum longevity and reduced maintenance  costs.
 
    *   Protects against increased heat and pressure 
    *   Outstanding cold-flow properties 
    *   Protects brass synchronizers 
    *   Friction-modified 
    *   Excellent seal compatibility 
    *   Inhibits rust and corrosion 
    *   Long service life


But if you read their recommendations for their GL5 spec gear oil, Their
product name: 75W-90 Long Life Synthetic Gear Lube,  it only recommends it
for axles if GL4 was the  original spec.
 
"Use AMSOIL Long Life Synthetic Gear Lube in differentials, manual
transmissions or other gear applications where one or more of the following
standards are specified: API GL-5 & MT-1, MIL-PRF-2105E, Dana SHAES 234
(Formerly Eaton PS-037) for 250,000 miles, Dana SHAES 256 (Formerly Eaton
PS-163) for 500,000 miles, Dana SHAES 429A, Mack GO-J & GO-J+, Meritor 0-76N
(75W-90) & 0-80 (80W-140) plus hypoid gear oil specifications from ZF TE-ML
07A and
08 foreign and domestic manufacturers such as GM, Ford and Daimler Chrysler.
It can also be used in rear axles where API Service GL-4  lubricant is
recommended."
 
I added the bold above. So, if you wish to run Amsoil, why  not run their
GL4 product? It is what AMSOIL recommends. -  Seth
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