How well do you know your truck’s transmission?  Trucks, semis, tractor trailers, 18 wheelers, big rigs, reefers, low boys and freightliners usually have manual transmissions.  Truckers prefer manual transmissions because they allow the driver to have more control of the trucks.  Nowadays, truck manufacturers also offer semi-automatic transmissions and fully automatic transmissions as well.

In the past, trucks often had twin gearshifts, generally with 4 or 5 ratios on main shift and 3 or 4 ratios on the auxiliary shift.  For the most part, semi-truck transmissions provide approximately nine or ten gear ratios.  Semi-trucks can provide up to eighteen gears.  The more gears a truck has – the finer the control of braking – especially in downhill situations and dramatic curves.

On semi-trucks with constant mesh transmission a clutch brake is required to stop the rotation of the gears.  This feature allows trucks to be put into gear without worry about gears grinding when trucks are stationary.

If your truck needs roadside assistance due to transmission problems, be sure to visit our comprehensive Truck Repair / Road Assistance Service Providers

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