<VV> Tranny and rear axle oil

[Paul Fox]

I really wish it were that simple it's not. I just wrote I used a GL-4 only oil in my rebuilt transaxle. It shifted very balky. Because it does not have the correct friction modifier in it.  Trying to find the right oil is not easy as walking in your flaps any more. I've tried. You must order the correct oil any more. This makes it a real pain for me as a Corvair mechanic. That means I have to keep on hand something that will work. Paul Fox 


     On Monday, April 6, 2015 3:51 PM, Vairtec Corp via VirtualVairs <virtualvairs at corvair.org> wrote:
   

 This thread is starting to wear me out.

It's easy, really.

What is needed for stick-shift Corvair transmissions is Service GL-4, 
with no mention of GL-5 on the label.  Even if the label includes GL-4, 
if it also includes GL-5 don't use it.

This is true for all manual-transmission Corvairs. Powerglide-equipped 
vehicles can use the newer GL-4/GL-5 products because the differential 
lube is not shared with the transmission.

Here in my New Jersey climate, SAE 80W-90 is the best readily-available 
viscosity.  But there are synthetic products available with a SAE 75W-90 
rating, and these synthetics are generally acceptable.  But 
non-synthetic products with a 75W-90 rating are too light for our Corvairs.

Also available is 85W-90, but this is considerably thicker when cold and 
is not recommended.

I am not a oil expert.  But Richard Widman is and I took this 
information from his writings on the topic.  See it here: 
http://www.widman.biz/uploads/Transaxle_oil.pdf

The key point is, use 80W-90, Service GL-4 that has no reference to GL-5 
on the label.

--Bob

 _______________________________________________
This message was sent by the VirtualVairs mailing list, all copyrights are the property
of the writer, please attribute properly. For help, mailto:vv-help at corvair.org
This list sponsored by the Corvair Society of America, http://www.corvair.org/
Post messages to: VirtualVairs at corvair.org
Change your options: http://www.vv.corvair.org/mailman/options/virtualvairs
 _______________________________________________