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[Datsun 1200 encyclopedia]

K Gearbox

From Datsun 1200 Club

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Categories: Transmission | Transmission Modifications

<-- back to Toyota 5-speed

Can't find a good Datsun gearbox? Toyota K gearbox is the K40 4-speed and K50 5-speed light/medium-duty transmissions found in Toyota Corollas and Starlets. It is readily available. It is good for up to 103 ft. lb. torque, so appropriate for a naturally aspirated A engine. Not strong enough for a turbo or supercharged engine.


     Starlet K engine
     Corolla K engine
1986 Corolla 3A-U, 4A-U (up to 101 ft. lb.)
KM20 Liteace with 4K, 5K, 7K engine (up to 103 ft. lb.)

Stripped 3rd on a K40 (don't use with a supercharged A15)
12299.jpgAlbum click to view


      K40    K50
1st: 3.769  3.789
2nd: 2.250  2.220/2.124
3rd: 1.405  1.435/1.323
4th: 1.000  1.000
5th:        0.865
REV: 4.316  4.136


3rotor shows how he swapped the K40 into his ute.

See main article: Cut-n-shut

11870.jpgAlbum click to view 11872.jpgAlbum click to view 11873.jpgAlbum click to view 11874.jpgAlbum click to view 11875.jpgAlbum click to view 11876.jpgAlbum click to view 11877.jpgAlbum click to view 11878.jpgAlbum click to view 11880.jpgAlbum click to view

Release Lever
11881.jpgAlbum click to view

Release Bearing. Make a sleeve adapter for the Nissan unit
11882.jpgAlbum click to view

Yoke must be adapted to Datsun driveshaft
11871.jpgAlbum click to view 

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This page has been accessed 4,155 times. This page was last modified 08:59, 24 November 2021. Content is available under Datsun 1200 Club.