healeys
[Top] [All Lists]

Fwd: Jumping out of overdrive is back!

To: healeys@autox.team.net
Subject: Fwd: Jumping out of overdrive is back!
From: Simonlachlan@aol.com
Date: Wed, 2 Jun 2004 01:57:19 EDT
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
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
X-Mailer: 9.0 for Windows sub 631
X-Converted-To-Plain-Text: from multipart/alternative by demime 0.99d.1
X-Converted-To-Plain-Text: Alternative section used was text/plain

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.





<Prev in Thread] Current Thread [Next in Thread>