MM gearbox

for those with Series MM sidevalve cars produced between September 1948 and February 1953
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Berniewade
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MM gearbox

Post by Berniewade »

Hi gearbox on a 1949 MM is the same gearbox fitted to a series e Morris 8
Mine is jammed in 4th gear after attending a classic car show today
smithskids
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Re: MM gearbox

Post by smithskids »

Same internals but the casing is different. I have recently o/h my spare and the guts of the 1939 series E box went straight in to my MM casing. :D
Ams07
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Re: MM gearbox

Post by Ams07 »

The club has two second hand units if you need a spare, contact Bryan G
firedrake1942
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Re: MM gearbox

Post by firedrake1942 »

There are several on e bay but i cannot tell if 3 speed or 4.
RobThomas
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Re: MM gearbox

Post by RobThomas »

3-speed is shorter so that it doesn't have an extended casing that goes much beyond and inch aft of the back edge of the top cover plate, if you see what I mean.
Cardiff, UK
BLOWNMM
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Re: MM gearbox

Post by BLOWNMM »

The g'box of a Series E and MM are identical except for the rear housing refered to as 'Casing - speedometer drive' in the manual. The mounting lugs are different and possibly the speedometer drive gear.
Bob
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Vetteman
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Re: MM gearbox

Post by Vetteman »

smithskids wrote: Mon Jun 05, 2017 4:53 pm Same internals but the casing is different. I have recently o/h my spare and the guts of the 1939 series E box went straight in to my MM casing. :D
By any chance do you or anyone else have a series e speedo housing casting so I can finish my dads Morris 8 🙏

Thanks mark
RobThomas
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Re: MM gearbox

Post by RobThomas »

https://www.ebay.co.uk/itm/Morris-8-Eig ... rk:55:pf:0

...or is it the iron casting you need. I'm not sure from your description.
Last edited by RobThomas on Thu Jan 03, 2019 8:42 pm, edited 1 time in total.
Cardiff, UK
Vetteman
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Re: MM gearbox

Post by Vetteman »

Hi thanks for reply.

I’m after the gearbox tail casing that the speedo drive listed fits into.👍

I have an mm one to swop/ deal on.

Thanks mark
RobThomas
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Re: MM gearbox

Post by RobThomas »

Ah, right. The bit that the engine mount rubbers bolt onto. Series E ones further forwards?
I've probably only got Series 1 or 2 castings here but will have a look.
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Vetteman
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Re: MM gearbox

Post by Vetteman »

Yes that’s the one. Cast iron with rear mounting hole lugs.

🙏🙏🙏
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