Twindisc 5055a

Palmer Johnson is North America’s leading distributor for all of your Twin Disc MG-5055A (MG5055A) marine gear transmission needs. Whether you are needing a replacement marine gear transmission, parts to do the repair yourself, or if you are wanting the factory trained technicians of PJ’s service department to rebuild your Twin Disc MG-5055A transmission, we’ve got you covered. Contact us today and you’ll be back up and running in no time!

MG-5055 A

Standard Equipment

  • Vertical offset, aluminum housing
  • 10° down angle on output shaft
  • Mechanical control valve
  • Oil strainer


  • SAE J617 housing no. 3
  • SAE J617 housing no. 4
  • Borg Warner housing
  • Flexible coupling for 11 ½” flywheel (SAE J620 size 290)
  • Electric control valve (12 VDC or 24 VDC)
  • Control cable bracket
  • Mechanical trolling valve
  • Oil cooler
  • Companion flange

Contact Us

Maximum 298 kW (400 hp) @ 3600 RPM [Pleasure Craft]

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Authorized Distributor

Palmer Johnson is an authorized distributor and service provider for Twin Disc products.

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Service and Support

Seven master rebuild centers, ten full-service centers, and an extensive dealer network to serve you.