<VV> Powerglide interchange

[James Davis]

There is a notch on the transfer plate by the throttle valve lever in 
the later PowerGlides.  1964 and later PowerGlides a very different 
transfer plate and valve body from the early ones and also have a 
downshift control valve.   The different valve body lets the 1964 and 
later transmissions develop 105 psi in drive and 200 psi in reverse 
while the 61-3 PG develops 82 psi in drive and 150  psi in reverse.  
This extra pressure locks the clutch plates tighter allowing the 
transmission to transmit more torque without slipping.  The clutches and 
steels are the same in both transmissions except for the extra friction 
face on some early reverse pistons.  Bob Ballew has researched the four 
different Corvair PowerGlides extensively.  I highly recommend his 
booklet for all you are interested in PowerGlides (Corvanatics has them 
for sale).

My personal experience shows an early PowerGlide will not last very long 
in an UltraVan.
Jim Davis


Ron wrote:
> How would we know?  How do we identify the early from the late PG's?
> RonH
>
> ----- Original Message ----- 
> From: "Harry Yarnell" <hyarnell1 at earthlink.net>
> To: <BobHelt at aol.com>; <virtualvairs at corvair.org>
> Sent: Saturday, April 24, 2010 8:05 AM
> Subject: Re: <VV> Powerglide interchange
>
>
>   
>> Should be ok. Havn't done what you're asking about, but my understanding,
>> all corvair PG's are the same. Maybe some spring differences...
>>
>> Harry Yarnell
>