How to replace the transmission fluid in a paragon transmission

Written by gus stephens
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How to replace the transmission fluid in a paragon transmission
Paragon marine transmissions are installed in many pleasure craft. (Jupiterimages/ Images)

Paragon transmissions are hydraulic marine transmissions manufactured by Paragon Power Inc. They are primarily installed in yachts and pleasure craft, particularly many Chris Craft models. Paragon's P-series transmissions are self-contained units with an oil pressurising system and oil supply completely separate from engine systems. Transmission oil is cooled by an independent oil cooler. The Paragon OEM manual specifies automotive Type A automatic transmission fluid for the series P200-P400. Type A is now generally obsolete at most retailers. Dexron III automatic transmission fluid is backwards-compatible with Type A and is its approved 2011 replacement.

Skill level:
Moderately Challenging

Things you need

  • Socket set and drive
  • Oil drain pan
  • Clean Rags
  • Funnel
  • Dexron III Automatic Transmission Fluid

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  1. 1

    Check the transmission fluid level every time the engine oil is checked, before running the engine. Paragon recommends changing the fluid after every 100 hours of operation, or once each boating season.

  2. 2

    Locate the Paragon P-series transmission's two drain plugs: One at the bottom of the reverse gear housing and the other at the bottom of the reduction gear housing. Place the drain pan beneath each plug, remove the drain plug with a socket wrench, and allow the fluid to drain. Replace both drain plugs and tighten.

  3. 3

    Remove the oil filler cap next to the dipstick, to the left of the shift lever. Place a funnel in the oil filler. Exact fluid capacity of P-series transmissions is not specified by Paragon because of installation variables such as inclined angle of boat, hose lengths to cooler, and cooler size. Paragon advises pouring in fluid until dipstick reads "Full." Replace oil filler cap.

  4. 4

    Start the engine and idle for a few minutes to fill the oil passages and the oil cooler, then check fluid level on the dipstick again. Top off with additional fluid as necessary.

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