MG 5506

Palmer Johnson is North America’s leading distributor for all of your Twin Disc MG-5506 (MG5506) 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-5506 transmission, we’ve got you covered. Contact us today and you’ll be back up and running in no time!


Standard Equipment

  • Vertical offset, cast iron housing
  • Mechanical control valve
  • Oil strainer and oil filter
  • Oil cooler for raw water cooling
  • Companion flange/ bolts set


  • SAE J617 housing no. 0
  • SAE J617 housing no. 00
  • Flexible coupling for 18” flywheel (SAE J620 size 460)
  • Flexible coupling for 21” flywheel (SAE J620 size 530)
  • Input flange for freestanding installation
  • Electric GP-valve with manual override
  • EC050 Profile module – interface for engagement signals
  • EC050 E-Troll module – interface for engagement & trolling signals
  • Harness with single point interface to Twin Disc EC300 control system
  • Oil cooler for fresh water cooling
  • Output shaft driven trailing pump
  • Monitoring devices to customer’s specification
  • Mounting brackets
  • Live PTO:
    • SAE J744 size 127-4, 32-4 (SAE “C”, 4-bolt, max. 592 Nm)
  • Hydraulic clutchable PTO:
    • SAE J744 size 127-4, 32-4 (SAE “C”, 4-bolt, max. 592 Nm)

Contact Us

Maximum 1489 kW (1997 hp) @ 1800 RPM [intermediate duty]

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Authorized Distributor

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

Genuine Parts

Thousands of parts ready to ship in as little as two hours from our store at

Service and Support

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