<VV> What ATF?

[Jim Davis]

Depends on the temps you find in the PowerGlide.   Best is Dexron-3 if 
your trans temperatures never exceed 220F.   The newer Dexron-6 
(currently used by GM) is too slick for the old Powerglide and can cause 
the clutches or band to slip under full throttle, but it is much more 
temperature and viscosity stable.  Dexron-6 also has a greater amount of 
detergents so it will keep the valve body much cleaner than Dexron-3.   
How much more temperature, about 60 degrees since it is semi-synthetic.

For me, I use Dexron-6 and add part of a  bottle (10 oz) of K&W Trans-X  
(Thanks Mike Dawson).  It has the friction modifiers to keep the band 
and clutches from slipping.   My PowerGlide is a 140 behind a 190 cuin 
Corvair engine in an UltraVan.
Jim Davis


   On 4/7/2015 6:07 PM, jwcorvair--- via VirtualVairs wrote:
> Okay, we had so much fun with the discussion about transsexual lube, what ATF do you use? I am wondering if we might be running into the same issue with ATF that is compatible with our PGs.
>
>
> Joe White (62 four door, 64 Spyder [project], 66 Porvair)