Needed a little tractor with forks on it to move a bunch of seed around in a shed. The shifter linkage must have water in it because it locks up below freezing. The usual way to unthaw it is to use a space heater in the shop but it was parked out a ways. I'll be taking that apart later but for now I piped he exhaust to the frozen shifter with a bit of suction line. Unthawed in 15 minutes.