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Mini & Mini Cooper Layshaft 3-sync

Mini & Mini Cooper Layshaft 3-sync

Mini & Mini Cooper Layshaft 3-sync
All early Minis and even the original Cooper "S" had a 4-speed gearbox that only has synchros in the top three gears. The 3-synchro gearboxes have smaller shafts and bearings, so a good idea to replace this layshaft, specially for bigger engines.

This shaft is not stepped like the 4-synchro versions. The outside diameter is the same for it's full length. Also a VERY god idea to relace the laygear bearings. Takes two of the 88G396 roller bearings, one at each end of the laygear.

Related Technical Articles:
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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