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[Healeys] O/D Problems

To: <healeys@autox.team.net>
Subject: [Healeys] O/D Problems
From: "Greg Lemon" <glemon@neb.rr.com>
Date: Sat, 27 Oct 2007 10:20:50 -0500
As I mentioned earlier my BN1 overdrive is going wonky on me.  After years 
of yeoman's service.  I dropped out once on a long highway trip, and that 
now has quickly become the norm.

I checked the relays (BN1 has two of them, Bless Donald and his little elves 
hearts)  the other night they are fine so it is time to take the tunnel off 
I guess, have also checked the oil level and it is fine.

The O/d shifts in fine, and at first dropped out occasionally, now over the 
course of a few weeks ( I take the car out for maybe 3-4 drives a week) that 
has gone from occassionally to pretty much anytime throttle is applied or I 
go up a hill, if I really work at it I can get it to stay engaged a while. 
When it goes out sometimes it drops out completely sometimes it sort of half 
in/half out vaccillating.

Anyway I read a good article about the hydraulic part of the O/D that talks 
about weak non return valve springs being a likely  fix for low pressure. 
However neither the article http://www.ntahc.org/techtips/OVERDRIVE1.html 
nor my factory workshop manual identifies this part.  Can anybody help point 
this part out and can it be removed, service, withought completely 
dismanteling the O/D?  That and any other thoughts on the problem are 
welcome, still hoping it is electrical, but that hope is dwindling as I test 
and diagnose.

Greg Lemon
54 BN1
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