<VV> What Dale Said

[Henry Kaczmarek]

Ditto---It's what I used, and it is worth what you spend. 

HANK 

Hello Bill,

I know it is kind of pricey, but Amsoil's GL-4 Manual Transmission &
Transaxle Gear Lube 75W-90, product code MTG, is excellent for the shared
transmission/differential of manual transmission Corvairs.  If your car has
a Powerglide, then any GL-5 lube will work fine in the differential only.