Motor Boat Forward Reverse Gear Box using Fork Lever Shifting Mechanism - 3D Animation 

Yes absolutely.

Thank you.

Grey colour horizontal shaft is the main output shaft which has splines, brass yellow colour component is dog clutch that engages and disengages the forward and reverse bevel gears. Red, blue and green colour components are bevel gears. Green colour bevel gear is the driving gear which is connected to the engine. Shifting lever slides on the groove of the dog clutch. I don't know what is your application is. But if you want to build one to verify the working mechanism of this gear box then start with small parts. Buy two sets of electric angle grinder bevel gear sets, which you can buy online. These spare bevel gear set costs around 380 rupees. Find a suitable shaft for the gears. Use plywood for supporting structure. Use ball bearings for supporting the gears. You can weld the projections for the dog clutch and file it smooth. Make only two splines on the main shaft and in the dog clutch to simplify the process. Two splines should be opposite to each other on the shaft. Cut matching slot in the dog clutch internally. This will be fun to build.