[Healeys] OD switch wrench

[Bob Haskell]

Alan,

It's not listed on many Whitworth charts.  11/16 W is 1.200" AF. 1-5/32" 
is 1.156".  0.044" difference.  Seems a bit sloppy, but not a lot of 
torque required.

Thanks!

Cheers,

Bob Haskell
Austin-Healey 3000 roadster registrar


On 9/3/26 16:27, Alan Seigrist wrote:
> That's because lucas never used UNF  - it will be a BA (for small 
> stuff) or Whitworth spanner size.  This size corresponds to an 11/16" 
> Whitworth Spanner.
>
> On Tue, Sep 1, 2026 at 5:28 PM Bob Haskell <rchaskell at earthlink.net> 
> wrote:
>
>     I bought a thin open ended wrench off of ebay and did some
>     filing.  Took
>     the switch off easily.
>
>     So the next question - what's the thread size?  Looks to be
>     5/8"-13 - 55
>     degrees.  Anyone know for sure?
>
>     Cheers,
>
>     Bob Haskell
>     Austin-Healey 3000 roadster registrar
>
>
>     On 8/27/26 18:44, JSARCH wrote:
>     > I I have uses this 1-3/16 wrench but I can't recall for certain
>     because it has been many years since I have had to remove the
>     switch. It is about 1/4" thick.
>     >
>     > Cheers,
>     > John
>     > '62 BT7
>     >
>     > -----Original Message-----
>     > From: Healeys <healeys-bounces at autox.team.net> On Behalf Of Bob
>     Haskell
>     > Sent: Thursday, August 27, 2026 5:26 AM
>     > To: Healey List <healeys at autox.team.net>
>     > Subject: [Healeys] OD switch wrench
>     >
>     > Listers,
>     >
>     > Anyone know the wrench used to remove the 3rd/4th gear OD switch
>     from the center shift gearbox.  Appears to be 1-5/32" which is not
>     a common size.  Thinking of getting a thin 1-1/8" open end wrench
>     and opening it up a bit.
>     >
>     > Cheers,
>     >
>     > Bob Haskell
>     > Austin-Healey 3000 roadster registrar
>     >
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