HTA

5 or 6-Speed Dog-Change Gearbox

Description

Dog-change gearbox designed for use in front-engine, rear-wheel-drive race cars.

Features

Available in both H-Pattern and Sequential shift versions.
The lay-shaft and main-shaft are arranged in a plane parallel to the ground to allow for especially low-mounted engine configurations.
Torque rating for endurance events is 880Nm (650ft.lb).
The gearbox is fitted with 5 or 6 forward gears and a reverse gear. 5 speed versions also contain a pair of drop gears that can be changed to alter the overall transmission ratio. All forward gears are profile ground for increased efficiency and durability.
Shifting is via an integral gear-lever (sequential only) or a remotely actuated shift-rod.
The internal lubrication system consists of a magnetic / paper element filter, an oil pump with provision for an external oil cooler and an integral spray bar to feed cooled oil directly onto the gears.
All gears are removable from shafts with an extensive range of ratios available.
Input is via a removable quill-shaft which can be customised to suit individual requirements.
Output is via a slip yoke which can be customised to suit individual requirements.
On sequential versions a gear position sensor is supplied for interfacing with an electronic dash display.
Alternatively a stand-alone gear indicator display is available for cars not fitted with an electronic dash.
Case hardened nickel chrome steel is used for all gears and shafts.
The selector forks are manufactured from high tensile, nitrided steel.
Casings are sandcast Aluminium alloy, heat treated to T6 specifications.
O-ring seals are used on all joint faces.
Gearbox weight is 39kg (86lbs)