I'm trying this again in view of the past few days' silence.....
You will recall my email concerning my BT7's new habit of jumping out of
overdrive...
""One for the gurus....
Background first:-
I have all new overdrive mechanicals which worked fine until just recently.
I have a 28% ratio o/d unit.
Plenty of good clean oil in gearbox, first thing I checked.
Overdrive on/off switch is new and works fine.
Switch on gearlever is not new but works fine.
I have not messed around with carbs or related linkage.
Solenoid sounds healthy and engages overdive firmly.
(I have a 3:54 diff, so the revs may seem a little low to you, especially
coupled to a 28% o/d)
So, the symptoms
If I am driving along at about 1,900revs with my car in overdrive/4th,
she'll jump out of overdrive if I raise the revs/speed with the accelerator.
If I then decelerate back to 1,900 (+/-) she'll pop back into overdrive."
The car has been off the road while some work was done on the instruments,
so i could not provide feedback re. the many and excellent mails I received.
So it was circumstance, not idleness....
Well, I've done the obvious first thing and bridged the throttle switch on
the bulkhead. The symptoms vanish. Where would I go now...? ....must the fault
be in the throttle switch? First logic says yes, but how can the throttle
switch disengage the unit while the relay is working?
But, if the relay isn't working, how does it ever switch on in the first
place?????????
Simon.
Return-path: <Simonlachlan@aol.com>
From: Simonlachlan@aol.com
Full-name: Simonlachlan
Message-ID: <28.481d2bff.2deb058c@aol.com>
Date: Sun, 30 May 2004 05:38:20 EDT
Subject: Jumping out of overdrive is back!
To: healeys@autox.team.net
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You will recall my email concerning my BT7's new habit of jumping out of
overdrive...
""One for the gurus....
Background first:-
I have all new overdrive mechanicals which worked fine until just recently.
I have a 28% ratio o/d unit.
Plenty of good clean oil in gearbox, first thing I checked.
Overdrive on/off switch is new and works fine.
Switch on gearlever is not new but works fine.
I have not messed around with carbs or related linkage.
Solenoid sounds healthy and engages overdive firmly.
(I have a 3:54 diff, so the revs may seem a little low to you, especially
coupled to a 28% o/d)
So, the symptoms
If I am driving along at about 1,900revs with my car in overdrive/4th,
she'll jump out of overdrive if I raise the revs/speed with the accelerator.
If I then decelerate back to 1,900 (+/-) she'll pop back into overdrive."
The car has been off the road while some work was done on the instruments,
so i could not provide feedback re. the many and excellent mails I received. So
it was circumstance, not idleness....
Well, I've done the obvious first thing and bridged the throttle switch on
the bulkhead. The symptoms vanish. Where would I go now...? ....must the fault
be in the throttle switch? First logic says yes, but how can the throttle
switch disengage the unit while the relay is working?
But, if the relay isn't working, how does it ever switch on in the first
place?????????
Simon.
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