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Transmission Laygear Close Ratio - Mini & Mini Cooper

Transmission Laygear Close Ratio - Mini & Mini Cooper

Transmission Laygear Close Ratio - Mini & Mini Cooper
One of the Mini gearboxes most sought after is the late 4 synchro remote box that has close ratio gears. The most certain identification is done be inspecting the laygear. If it is a 22G1040 laygear you have a close ratio box. While you are inspecting the laygear be sure to check the inner surface of the laygear which serves as the outer race of the layshaft bearings. This surface can breakdown resulting in premature failure of both the bearing and the shaft.

These laygear are getting harder and harder to find. It is best to call to check availability.
Related Technical Articles:
ENGINE TRANSPLANTS - gearbox information
Created: November 01, 2000
Selecting the right final drive ration is a subject worthy of an entire book to explain the whys and wherefores, and also causes much consternation on the part of the transplanter. Much confusion’s spread over which gearbox has the best ratios, is best to use, and with which FD. For a detailed account on this and covering all gearboxes fitted as standard to the Mini, see the relevant separate articles 'Gearbox - Standard production gearbox types'.
GEARBOX - Close-Ratio Conversion Pre-A+ gearbox
Created: October 26, 2000
It is entirely possible to change the common 4-syncro gearboxes to the helical close-ratio set-up as used in the Cooper S, 1275GT, 1300GT, and some early MG Metros providing the right parts can be sourced.
Created: October 26, 2000
As outlined in the 'Gearbox - standard production gearbox types' article, it is entirely possible to change the common 4-syncro gearboxes to the helical close-ratio set-up as used in the Cooper S, 1275GT, 1300GT, and some early MG Metros providing the right parts can be sourced. And you don't already un-knowingly have the close-ratio kit fitted! Part numbers are detailed at the end.
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