<VV> Transmission Fluid (Manual)

[Eric S. Eberhard]

Query for the group -- not only Corvair, but ...

I have noticed a trend recently to put ATF in manual transmissions.  On my 
80 Toyota 4x4 I noticed it had ATF (after a transmission replacement after 
200k miles).  The owner's book calls for 90-140 gear oil.  The Hanes book 
calls for ATF.

My 62 Spyder has 90-140 gear oil because that is what I used to always use 
... no other reason, so I put it in.

Both work fine.  Where I live winters are 15 at night and 65 in the day, 
summers are 100 day and 55 at night ... so we have extreme swings during a 
day and during the year.  I don't plan on changing fluids each season :-)

What would the group suggest for the Spyder?  For the 80 Toyota?

Last -- a friend has an 83 Toyota with 250k miles.  The synchros are shot 
(no surprise, original tranny).
I don't know what is in it, but does anyone have any idea what would be 
best to put in just to eek another 10k out of it (yes, I know that synchros 
are unneeded if you know how to drive, but, alas, it is beyond her).

Should I try gear oil if it has ATF and STP if it has gear oil?  I am open 
to anything!

Eric S. Eberhard
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