Originally Posted by Chris2806126
Owners manual say that even reverse has a synco.
From the service manual......
The manual transmission is a fully synchronized two-shaft transmission with six forward gears and one reverse gear. The 6th gear is used to save fuel and reduce engine speed. The manual transmission is equipped with a
conventional dry clutch with automatic wear adjuster which is operated by a central clutch operator. The transmission is maintenance-free and has a permanent oil fill. A precise and light shift with short shifting travels is achieved by the following measures:
²
Transmission of the shift lever movement to the transmission by the shift rod and control cable
²
Central shift shaft supported on needle bearings
²
Multiple-cone synchronization in 1st, 2nd, 3rd and 4th gear
² Fully-synchronized reverse gear 
Regardless of what the manual says, think of whats happening mechanically. When rolling backwards your output side of the transmission is rotating in the opposite direction to the input side (engine input shaft).
Therefore have some mechanical sympathy and engadge reverse with the vehicle at rest.