Serial number H2X324N0171315, 20 yrs old, almost 20,000 hours. It doesn't owe us anything, but... We are having an intermittent problem similar to others posted. Truck sometimes stops forward or reverse movement when you let off the accelerator or switch from forward to reverse with foot off accelerator. This problem is much more frequent when battery is less than fully charged. The truck is usable if the accelerator pedal is fully depressed and movement is controlled by the brake. Has anyone else experienced this? Please share your thoughts on the cause and potential fix. Thank you.