How to change trans fluid in trail boss 330?

To change the Transmission Fluid in a Trail Boss 330, first ensure the vehicle is on a level surface and the engine is off. Remove the transmission drain plug and let the old fluid drain completely into a suitable container. Replace the drain plug and then refill the transmission with the appropriate type and amount of new fluid through the fill port, using a funnel for accuracy. Finally, check the fluid level to ensure it’s within the recommended range, and dispose of the old fluid properly.