<VV> Towing Powerglide

[frankcb at aol.com]

Joel,
    Since LM Corvair PG models can be push started they will definitely turn over the engine.  I even used to park my 66 "Joe Cool" Corvair (he had A/C) at the highest corner of the company parking lot and, when work was over, I'd try to start it by simply rolling it in neutral to get up speed, then put it into Drive and it usually got started before I left the parking lot.  As I remember it took about 20 - 25 mph speed to get the engine to turn over enough to start.
    Frank Burkhard
    Boonton, NJ
     
-----Original Message-----
From: Joel McGregor via VirtualVairs <virtualvairs at corvair.org>
To: virtualvairs <virtualvairs at corvair.org>
Sent: Sat, Jul 25, 2015 4:00 pm
Subject: Re: <VV> Towing Powerglide


If the PG was left in gear you could easily fry it if a Corvair PG works like a
big car.  The rear pump in a big car PG will apply the clutches and turn the
engine.  If a Corvair will do the same it could easily overheat the transmission
by attempting to drive the engine through the converter.
Jet hydraulics are
doing work which makes heat.  If all the Corvair pump is doing is circulating
fluid it won't make much heat.
Joel McGregor

-----Original
Message-----
From: VirtualVairs [mailto:virtualvairs-bounces at corvair.org] On
Behalf Of Smitty via VirtualVairs
Subject: <VV> Towing Powerglide
Smitty Says;
Joel I promise you that a PG will get hotter than a pistol while towing with the
wheels on the ground.  How hot depends on duration and speed.  In my ignorance
or willingness to gamble I have fried a couple of PGs.  I don't care if the heat
comes from the converter or the pumps.  It is still there and can turn the fluid
brown in a hundred miles.  While I am saying this I might add that leaving the
car idle is not a foolproof way to protect the fluid.  The converter, which
turns with the engine may be able to cool the fluid a little as it cycles the
fluid from the tranny and back again, but to be truly effective it has to be
spinning fast enough to create a centrifugal air pump, drawing in air and
expelling it through the holes provided in the bellhousing.
Jet aircraft
hydraulic fluid (which is very closely related to Dexron 3) have no converters,
and do have large oil coolers and miles of tubing which gives off heat, to keep
the temperature down.  Still the fluid gets very hot.  There are little pop up
telltails throughout the aircraft which warn the mechanic that the fluid has
reached 275 degrees and the fluid must be changed.


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