N80
Super Member
I've had that happen! I've got some deeply rutted roads and was going up one of them with the mower the other day and the back right tire was on a high spot and the left front was on a high spot with the right front and left rear dangling over a deep rut. I was kind of teetering there for a moment (the mower sort of stabilized things and there was no danger since each of the free tires where only an inch or two above the bottom of the rut). But for a moment forward motion stopped and the free wheels just spun. A quick touch of the diff lock got things going again.