Gearbox Repairs (Automatic and Manual) Services in South Africa

Automatic and Manual Gearbox Repairs Services in South Africa: RMI Approved Workshops services, repairs & overhauls manual & automatic gearboxes including transfer cases, propshafts & differential overhauls. Transmission types falls into four categories: Manual, Automatic, Semi-Automatic and Continuously Variable.

Manual Gearbox Transmission

Two types of the Manual transmissions exist:

A simple yet rugged sliding-mesh system, where straight-cut spur gear sets spin freely and must be synchronized by the operator matching engine revs to road speed in order to avoid noisy and damaging clashing of the gears. This type was standard in many vintage cars.
The universal constant-mesh gearboxes are now the modern standard for on- and off-road, manual and semi-automatic transmissions. In these, typically diagonal cut helical (or sometimes straight-cut or double-helical) gear sets are constantly “meshed” together. The changing of gears happens by way of a dog clutch (two rotating components that couples by interference and not by friction).

Automatic Gearbox Transmission

An automatic transmission primarily uses hydraulics to select gears, depending on the pressure exerted by a fluid within the transmission assembly. Rather than using a clutch to engage the transmission, a torque converter or fluid flywheel, placed in-between the engine and the transmission, makes it possible for the driver to control the number of gears in use or select reverse, though precise control of which gear is in use, may or may not be possible.