MM gearbox

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

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MM gearbox

Postby Berniewade » Sun Jun 04, 2017 6:36 pm

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

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Re: MM gearbox

Postby smithskids » 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

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Re: MM gearbox

Postby Ams07 » Mon Jun 05, 2017 6:10 pm

The club has two second hand units if you need a spare, contact Bryan G

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Re: MM gearbox

Postby firedrake1942 » Mon Jun 05, 2017 6:40 pm

There are several on e bay but i cannot tell if 3 speed or 4.

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Re: MM gearbox

Postby RobThomas » Tue Jun 06, 2017 8:27 am

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.

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Re: MM gearbox

Postby BLOWNMM » Tue Jun 06, 2017 9:14 am

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.

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