[Healeys] OD Design Flaw? (was Munched Overdrive?)

[Dave Porter]

The mechanic was wrong. If the engine is shut down there is no pressure to
keep the O/D "engaged" for long, it bleeds off pretty rapidly. It's also
necessary to have the solenoid powered to keep the operating valve open. The
reverse switch is another animal altogether, as it keeps power from going to
the solenoid when reverse is purposely selected.
dave

frogeye at porterscustom.com

Porter Customs   2909 Arno NE
Albuquerque, NM USA 87107
505-352-1378
1954 BN2  1959 AN5
Porter Custom Bicycles

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 www.britishcarforum.com/portercustoms.html
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-----Original Message-----
From: healeys-bounces at autox.team.net [mailto:healeys-bounces at autox.team.net]
On Behalf Of wilkmanracing at aol.com
Sent: Sunday, September 19, 2010 2:15 PM
To: healeys at autox.team.net
Subject: [Healeys] OD Design Flaw? (was Munched Overdrive?)

 Thanks to everyone who has offered wisdom, advice, help, etc. regarding my
"Munched Overdrive" post.  I am going to try the hammer tap suggestion and I
do plan to drain the O/D to see what comes out.  If it's munched, I need to
decide whether to have it fixed or to go the Toyota 5-speed route.

I do have one other question for the group.  When I had my trans and OD
rebuilt about 10 years ago, the rebuilder told me to make sure the OD is
disengaged before the car is parked.  I believe he also mentioned that I
should not back the car up if I forget to do this, as it could destroy the
OD.
My question is this:  Why would something as simple as leaving an OD engaged
cause such havoc.  I'm pretty mechanically wise, but I'm sure a lot of
Healey
owners in the past have been just plain drivers with no real mechanical
knowledge.  Someone like my wife would never even think about disengaging
the
overdrive after every freeway run.  Isn't this a serious design flaw that
such
a simple lapse would lead to such a mechanical disaster?



 Bill Wilkman
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