<VV> Towing Powerglide

[Joel McGregor]

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.

 _______________________________________________
This message was sent by the VirtualVairs mailing list, all copyrights are the property of the writer, please attribute properly. For help, mailto:vv-help at corvair.org This list sponsored by the Corvair Society of America, http://www.corvair.org/ Post messages to: VirtualVairs at corvair.org Change your options: http://www.vv.corvair.org/mailman/options/virtualvairs
 _______________________________________________