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Exclusively available from Gearboxman
Gearboxman-designed uprated gearkits
Heavy duty semi-helical design
Constructed from EN36 (9310) heat-treated steel
Wide or close ratio
Supplied with new steel front cover (casing has to be enlarged to fit "great big gears" through!)
Supplied with new heavy duty one-piece operating block
5th gear runs on needle rollers
In stock NOW!
vast range available
fast-road to race, rally, off-road, hill-climb, sprint, etc.
manufactured from high-grade alloy steels
optimised ratios for improved driveability
straight-cut or helical-cut option on some kits
heavy duty selector forks supplied where original has a known weakness
we can supply or fit this kit for you - just ask!
ZF S5-18/3 Direct Top gear kit
homologated ratios of 2.3, 1.8, 1.36, 1.14, 1.00
various input shafts available
direct fit into standard gear cases
we can supply or fit these kits - just ask!
Please note that discontinued items will not appear on the website, however, servicing and repairs are still available.
Please use the "contact us" link above for further information.