Rolls forward in neutral, locks up rolling backwards??
I didn’t see your reply before doing what I did. I ended up removing the C clip, separating the park rod from the VB. I took some pictures of the mechanism holding it in. I’m sure it’s a really basic solution, but I didn’t want to pull so hard that I ended up breaking something.
Now that the valve body is out, I think my next plan of action is going to be to reinstall the driveshaft and get one rear wheel off the ground. Then have someone spin it while I can see what’s happening inside the trans.
The good news is I think the valve body looks to be pretty clean. No varnish, just some sludge here and there. I did notice some grit, the pieces I can see look like tiny sand particles.