How to Change your Hydrostatic Transmission Fluid in a John Deere 325 335 345 355D in 4 Simple Steps

This is a hands-on DIY walkthrough of a hydrostatic transmission fluid change on a John Deere 325 (also covering 335, 345, 355D, and GX successors), showing all four steps: draining, swapping the in-transmission and inline filters, and refilling with 4.7 quarts. It includes real filter part numbers, actual dealer prices (~$100 for both filters), fluid choice reasoning, and tool sizes used. Best for owners planning to do this service themselves.

Posted by the Florida Deere channel, an owner walking through his own DIY maintenance rather than a dealer sales pitch.