[Healeys] Another O/D issue

[m.g.sharp at sympatico.ca]

Thanks Earl/Bob – I was hoping the switch would be adjustable.  I will find time to get the g’box cover off (ugh!) and adjust it.  I have another g’box, so if that does not work I can “switch” some parts 😊.

 

Cheers, Mirek

 

From: kags at shaw.ca <kags at shaw.ca> 
Sent: June 16, 2022 1:02 AM
To: 'Bob Spidell' <bspidell at comcast.net>
Cc: m.g.sharp at sympatico.ca; Healey List <healeys at autox.team.net>
Subject: RE: [Healeys] Another O/D issue

 

Hi Marek.  Had the same thing happen to me years ago on my BJ8. Same design different arrangement on the centre shifts as on the side shifts – same switch part# for all.  Bob is right – the switch setting (not a tapered thread) is done with the fibre washer as a shim.  The ball end activator on the switch wears with mileage – the switch has to be moved a bit inward to make up for the wear.  A thinner washer (or maybe even no washer) will do the trick. As Bob says, just don’t jam it.

 

Earl Kagna

Victoria BC

BJ8, BT7 tri-carb

 

 

 

From: Healeys <healeys-bounces at autox.team.net> On Behalf Of Bob Spidell
Sent: Wednesday, June 15, 2022 8:22 PM
To: healeys at autox.team.net
Subject: Re: [Healeys] Another O/D issue

 

The switch may be pipe thread, but you set its depth with shims (which are just fiber washers), part# 134 in this diagram:

https://mossmotors.com/external-gearbox-4-speed-side-shift

The lever on the shift rod (#94) bumps the switch; it only presses against the switch, closing its contacts, in 3rd & 4th. Pushing the lever to the right pushes the shift rod to the left into the switch. If you have a 'shim' under the switch, removing it, or putting a thinner one in, should solve the problem (the tip of the switch has limited travel, you don't want to jam it into the switch). If not, you'll need a new switch (contacts worn, maybe). Least likely, but not impossible, is a worn shift rod (they're brass).



On 6/15/2022 7:33 PM, m.g.sharp at sympatico.ca <mailto:m.g.sharp at sympatico.ca>  wrote:

Hi listers, I am finding that my BT7 (i.e. sideshifter) is dropping out of overdrive if I wiggle the shift lever to the left.  This is without doubt opening the contact in the gearbox switch that only permits the O/D to operate in 3rd and 4th thus causing the O/D to disengage.  Pushing the lever to the right re-engages it. I do not recall any adjustment on the switch to screw it in further, in fact I think it is a pipe thread and will only go in so far.  I am not sure what part of the shift lever actually bears on the end of the switch to engage it.  The workshop manual is not much help in figuring it out.  Is it the switch or is it what ever it bears on when in 3rd or 4th?   I have not had the g’box cover off to look at it yet but thought I’d ask the list if anyone had encountered this.  

 

Thoughts and ideas?

 

 

 

 

 


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