Hey fellas, I picked up a 555D with the 4x4 torque converter transmission last week and have been feeling my way around it. Replacing filters and fluids, greasing all the zerks, etc. Replaced a stabilizer line that blew, pulled a couple stumps in the yard. Everything working great, except that after running a while, my forward gear stops working. Reverse still works fine at this point. I shut the machine off for 5-10 seconds and restart it, and forward works fine again for a short while, a minute or less, then stops working again. If I let the machine cool back down, it works just fine for a half hour or so until it gets warmed up again. I saw a short note in one of the repair manuals about there being some sort of "overload" on the shifting solenoids and if they tripped, that shutting the machine off for 5-10 seconds would reset the overload. So that's how I discovered that shutting the machine off would get it going again right away. Anyway, just figured I'd ask if anyone has run into the problem and diagnosed and repaired it before I go digging in to the troubleshooting rabbit hole.