Synchronized reverse gear

SYNCHRONIZED REVERSE GEAR

The version for the 6-cylinder engine has a synchronizer for reverse gear, which enables accurate and noiseless engagement.

The motion is reversed by the lay shaft (1) on which the following are to be found:

• a gear (2), with housing for the synchronizer, which constantly meshes with the gear (3) machined on the sleeve for engaging 1st and 2nd speed on the transmission shaft;
• a sliding gear (4) with synchronizer, which constantly meshes with the reverse gear (5) on the main shaft.

Reverse gear is engaged by the movement of the reverse gear selection rod with the corresponding fork (6) and consequently of the ssliding gear (4) which becomes integral with the gear (2) through the synchronizer.

A safety device prevents the inadvertent engagement of reverse gear. This device comprises a pin (7) which blocks the axial movement of the reverse gear selection rod; the pin is controlled by a flexible cable (8) operated by a sleeve (9) under the gearshift lever knob. Raising the sleeve (9), the cable (8) releases the pin (7), allowing the rod to move freely thereby enabling the engagement of reverse gear.

1. Reverse gear layshaft
2. Reverse idler gear
3. 1st and 2nd gear engagement sleeve
4. Reverse gear with synchronizer
5. Reverse driving gear
6. Reverse gear selection rod fork
7. Reverse gear selection rod release pin
8. Selection rod release pin control cable
9. Reverse gear selection rod release pin control sliding sleeve