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Richard Hardy

United Kingdom
2142 Posts
Posted - 15/11/2019 :  21:10:14  Show Profile
Synchromesh is similar to a modern manual gearbox, with cones helping to align the gears between changes, ie an advancement from the more primitive crash box

Rich

Vintage MG Parts
Edited by - Richard Hardy on 15/11/2019 21:11:23
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coracle

United Kingdom
1886 Posts
Posted - 15/11/2019 :  21:30:52  Show Profile
Synchro.....syncronise (the gears) Mesh...... meshing (of the gears) hence no Crash.....(ing of the gears)
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sam christie

United Kingdom
3059 Posts
Posted - 15/11/2019 :  23:53:41  Show Profile
In Barry Foster's excellent article on gearboxes he writes regarding the synchromesh version - "The ratios are different and it makes a good trials gearbox!"

Wolseley synchro examples seem only to come with a 9 spline input shaft and longer bell housing but the Minor example is almost a straight replacement for the M.G. J gearbox (though longer) and can be built up with an M.G. rear casting with a vertical speedometer drive outlet.

J2913 has a Minor rear casting with provision for mounting a handbrake lever which is useful for an M-type.





If an original gearbox is not available is there perhaps a good case to be made for a synchromesh box ?

Sam
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tholden

United Kingdom
1627 Posts
Posted - 16/11/2019 :  00:06:34  Show Profile
Sam I have what I am told is a Wolseley 4 speed box available if you know anyone who might be interested.
Terry

TH
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Robin Macmillan

United Kingdom
415 Posts
Posted - 16/11/2019 :  11:40:25  Show Profile
Perhaps secretly I always knew what synchromesh was and was just pulling your leg(s).

PB 0527
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coracle

United Kingdom
1886 Posts
Posted - 16/11/2019 :  18:01:28  Show Profile
But did you know that we knew that you knew and knowing that, we secretly pretended that we didn't know that you knew so thus you don't have have a leg to stand on that we can pull.

Does that have a baulk ring of truth?
Edited by - coracle on 16/11/2019 18:05:08
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Robin Macmillan

United Kingdom
415 Posts
Posted - 16/11/2019 :  19:00:21  Show Profile
Touché......enough torque of gearboxes for now.

PB 0527
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TCTom

USA
274 Posts
Posted - 17/11/2019 :  16:17:48  Show Profile
Hi Brian - and others.
Yes, all 11 MMMs are known to the register (4 J2s, L1, 4 PAs, 2 PBs).
Project has started; I'll write some notes on it to update everyone later in the year.

Tom Wilson
Zionsville, IN USA
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sam christie

United Kingdom
3059 Posts
Posted - 18/11/2019 :  12:01:02  Show Profile
Here is a synchromesh gearbox in a J1 in the USA. This one seems to have an MG rear casting with a vertical speedometer drive outlet.










Sam
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