Any knowledge appreciated - I have two Joe's Gear Transmissions - running behind two Vivian (Canadian manufactured 4 stroke diesels) 6 cylinder each (6 3/4 bore by 10" stroke and cruising RPM 400 average to 500 max). Boat is a 1940 66' displacement hull - weight about 85 to 90 Tons) The Joe's gears ratios are one to one. I'm having issues with keeping one of the transmissions in reverse. I't seems to slip out of reverse even after adjustment. Adjustment is by adjusting toggles (one click at a time) inside the transmissions. Any thoughts or information on where to go for advice appreciated. Thanks