Double synchroniser

Double synchroniser for 1st/2nd gear

Before a gear on the input shaft is engaged with a gear on the output shaft through the synchromesh body and the sliding sleeve, it is first of all necessary to synchronise the gears. The gears are synchronised during the gearshift via a taper on the gear and on the sliding sleeve of the synchromesh body.

This near-doubling of the area of the tapered friction face increases synchroniser performance by approx. 50 % and almost halves the shifting effort required.

The result is an improvement in operating comfort during down-changes from 3rd gear into 2nd gear and from 2nd into 1st gear.

The double synchronisers for each gear consist of

• a synchroniser ring (inner)
• a tapered ring
• a synchroniser ring (exterior).