I am finding the shifting a bit difficult, a grind here occasionlly, a hard push her, nothing consistent, other than reverse usually is the most frequent issue.
Thought I should check the fluid.
Is there a drain and fill plug separate? I haven’t looked yet.
Fluid suggestions, everything I see says be sure it is GL-4, not GL-5.
Fill plug is on the passenger side of the toploader. Fill to the bottom of the bolt hole.
It’s possible that your blocking rings are beginning to wear.
Replaced my fluid a few weeks ago. Used 2 qts of this fluid per recommendation from the site Royce provided. Purchased via Amazon as local stores didnt carry GL-4 for some reason.