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12g1288 Gearbox

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Astroblue

Post subject: 12g1288 Gearbox

Posted: Wed Jun 14, 2023 7:40 am

848cc

Joined: Mon May 22, 2023 1:27 pm
Posts: 11

Morning,
Did the Australian Morris Mini Cooper S Mark 1, ever leave the factory with a 12g1288 gearbox installed?
Thanks

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timmy201

Post subject: Re: 12g1288 Gearbox

Posted: Wed Jun 14, 2023 8:33 am

1275cc

Joined: Sun Apr 29, 2012 1:19 pm
Posts: 4352
Location: Wollongong, NSW

12G1288 is the part number for a 1275 non-S crankshaft

22A1288 gearbox was used on the Cooper S (and other engines). To confirm it’s an S box it would have a “12FA” number stamped on the front in the range in the link below

viewtopic.php?f=2&t=99897

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Astroblue

Post subject: Re: 12g1288 Gearbox

Posted: Wed Jun 14, 2023 9:17 am

848cc

Joined: Mon May 22, 2023 1:27 pm
Posts: 11

Thankyou for the valuable info and correction on the typo of the gearbox numbers.

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gtogreen1969

Post subject: Re: 12g1288 Gearbox

Posted: Wed Jun 14, 2023 9:44 am

1275cc

Joined: Fri May 02, 2008 3:07 pm
Posts: 5071
Location: The Internet

22A1288 started to appear in the 9FSAY 48000s. Serial numbers were in the 12FA 17000s. It wasn't an exact changeover so there will be engines in the 9FSAY 49000s with the earlier 22G333 box.

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