^ Types of Gears
^ Marine Gear Manufacturers
^ 1912 Directory of Marine Reverse Gear Manufacturers
^ Draft Resource – Comparing Marine Gears
NOTE: Page under Development. Almost Done!
Types of Gears
Vertical Offset Inboard
Coaxial (Inline) Inboard
Gear Types Flyer – Vertical Offset, Down-Angle & Coax (1pg PDF) from Seaboard Marine
Marine Gear Manufacturers
Arneson Drive (Twin-Disc)
Borg Warner (Velvet-Drive)
Detroit Diesel Gear
General Motors gear
Parsons Mathway Marine
Walters Gear (V-Drives)
ZF Friedrichshafen AG
ZF Hurth (ZF)
1912 Directory of Marine Reverse Gear Manufacturers
More from www.OldMarineEngine.com
- Little Joe’s
- Johnson Marine
- The Navy Gear
- The Automatic
- Michigan Wheel Co.
- National Gears
- Gies Gears
- Marine Iron Works Gears
- The Capitol
Draft Resource – Comparing Marine Gears
This Twin Disc MG506 transmission is very popular model. It was the standard transmission that cummins supplied with the early 5.9L engines before the ZF/Hurth 63 series. It is on par with the ZF63 which tends to be a little noisier. They are both multi-shaft trannys in aluminum cases which usually need oil coolers with the 5.9L to keep them cool. The Borg-Warner Velvet-Drive which was the most popular behind the Ford Lehman/American Marine 120/109 is an inline shaft tranny with planetaries in a cast iron case which makes it much stronger , but heavier. The Velvet-Drive CR2 version had the gear nut problem. Then some early Lehman/American engines had Paragon trannys which were ok, but seemed to require more repair.
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