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Jumping out of overdrive.

To: healeys@autox.team.net
Subject: Jumping out of overdrive.
From: Simonlachlan@aol.com
Date: Sat, 8 May 2004 04:53:23 EDT
Hi,
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 question:-
Am I right in assuming that the overdrive switch (on the bulkhead/linked to 
accelerator linkage) is the first place to look?
And, am I right in believing that it is really the only logical place to 
look?
(And does logic ever apply in these arera??!)

Should anyone reply - and I know you're out there - forgive me if I don't get 
back to you right away. I'm off (home) to N.Ireland for 8 days from this 
afternoon.

Simon.





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