sounds reasonable I was remembering my fleetside, where it may have been misplaced when the wood was changed .... thinkin about it I believe it is over the axle on my panel truck same principle, the heat affects the finish
"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir "When we tug a single thing on an old truck, we find it falls off" ~ me Some TF series details & TF heater pics
I was remembering my fleetside, where it may have been misplaced when the wood was changed .... thinkin about it I believe it 
same principle, the heat affects the finish