I know I had worked on a couple of chuggers but I can't remember what I did besides disassembling the box motor, checked or replaced cracked gears and lubed it up and can't remember if it fixed the situation or not. I do remember that I either fixed a chugging Cargo Liner or replaced the box motor entirely but it doesn't chug anymore.
Please let us know if a replacement fixes the problem.
Please let us know if a replacement fixes the problem.