[Healeys] reverse light switch

Bob Haskell rchaskell at earthlink.net
Sun Dec 31 08:22:01 MST 2017


The length of the Austin-Healey OD switch is 14.5 mm.  The threads are 
close to 16-2 mm; probably 5/8"-13.

I haven't checked, but I would think that the flats on the lever socket 
would be hardened.  Current thinking is to leave it alone.


Bob Haskell
AHCA 3000 MkI registrar

On 12/30/2017 07:06 AM, Oudesluys wrote:
> The top cover is thick enough for cutting the thread for the switch. Use 
> a fibre washer to even out the surface, not critical. There is barely 
> any load on the switch so one or two threads will be fine. You can fit a 
> spacer plate on the gear lever socket using Araldite or fix it with two 
> small screws with a sunken head. Secure the screws with Locktite. The 
> cover plate should be a bit taller than the surface on the socket as the 
> arc over which it will move is bigger.
> A similar switch with a longer nose (I think) can be found on the 
> gearbox of a Sunbeam/Hillman/Humber/Jensen-Healey 4sp box. I can check 
> if you let me know the dimensions of your switch (preferably in mm) as I 
> have a few lying about if I am not mistaken.
> Kees Oudesluijs
> Op 29-12-2017 om 19:01 schreef Bob Haskell:
>> Listers,
>> Anyone run across a center shift gearbox top cover fitted with a 
>> reverse light switch, opposite the overdrive 3-4 switch?
>> See the attached image.  The gear lever socket has the second flat to 
>> engage a reverse lamp switch, but there are a couple of issues.  The 
>> top cover flange doesn't have the boss for the switch (you can see the 
>> boss on the OD switch between the fiber washer and the flange, and on 
>> the inside), so it's thinner.   The flange is also farther away from 
>> the gear lever socket. Compare the two flanges to the two screws that 
>> hold the gear shift lever in place.
>> So I'd have to build up the inside of the flange and machine the 
>> outside of the flange to move the switch far enough inboard.
>> Just thinking out loud.
>> Cheers,
>> Bob Haskell
>> AHCA 3000 MkI registrar
>> http://www.ciahc.org/registry_3000mk1.php
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