Batteries are worn out. I mean, they ARE seven years old, and I, in my foolishness, ran them until the truck barely moved before charging them.
Still, I was hoping it was the ESC or something so I had an excuse to water-proof the truck. Also, you see those Super-Swampers? Yeah, I haven’t even gotten to run them since the batteries crapped out last Easter, when I got the tires. I was so disgusted I abandoned the truck and hadn’t touched it until last night, when I tested the batteries.
EDIT: Forgot to mention. No, I don’t run Lipo in it. Standard NiMH batteries for me.