Rick I would agree with what Tammie said below, also the centrifugal switch
can short against the transmission tunnel, causing overdrive to engage when
the switch is off. Enjoy your car, mine is just coming apart after 5 years
of driving fun, I am envious.
Greg Lemon
54 BN1
----- Original Message -----
From: "tammie wall" <whammie@iopener.net>
To: <Rick@genomictechnologies.com>; <healeys@autox.team.net>
Sent: Saturday, November 06, 2004 5:58 AM
Subject: Re: Overdrive wierdness - I'm not really sure
> rick,
> adjust throttle switch as per shop manual -- it should go from OD to
NORMAL at around 30-35 mph.
> jerry wall
> BN6
> Rick Neves wrote:
> >
> > I just got the tranny and overdrive back into my '56 BN-2 and it is
running
> > smoooth!
> >
> > But I still have this weird thing going on with the overdrive.
Basically the
> > way it is operating is that when you have the dash switch in the off
> > position, it runs without jumping into overdrive. Well that is normal,
but
> > once you flip the switch it will go into overdrive at the appropriate
times
> > only in third and fourth and it comes out of overdrive in any other
gear.
> > And that is normal as well.
> >
> > The problem is that if you put the switch in the normal position after
it
> > has been in the overdrive position, the system will not revert back to
the
> > "never go into overdrive situation". What I mean is that it will
continue to
> > shift into overdrive at the appropriate times in third and fourth even
> > though the switch is in the normal position. The only way to get it to
> > revert back to the "never go into overdrive (or normal)" operation is
to
> > turn off the key. I've even tried this while driving down the street.
> > Turning off the power and then turning it on and starting the engine
and the
> > overdrive then stays out.
> >
> > Now this may all be the way its supposed to be! I'm not sure. I can see
> > where it would be kind of a safety thing where hitting the switch
> > accidentally might cause a high revving situation if this didn't do
what its
> > doing.
> >
> > I've checked my wiring against the diagram several times. This is a
BN-2 so
> > it has the later design and all is correct. I'm scrutinizing the
schematic
> > and I guess myself I would have designed it a little differently having
the
> > dash switch the gas pedal position and the gear switch all in series to
have
> > the effect I'm expecting and its kinda like that but not exactly and
that
> > could be why its doing this weird thing.
> >
> > But then may be its supposed to be like that.
> >
> > Anyway I had a great ride the other morning just going around my block
about
> > a hundred times checking it out. Finally the power train is running
smooth
> > and I was relaxed enough to enjoy all the sensations of driving my
fully
> > rebuilt Healey.
> >
> > Check out my progress www.RickNeves.com
> >
> >
> > Sincerely
> >
> > Rick Neves
> > '56 BN-2
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