Hi Pancho.

That could be the source of your overheating.

Spray the daylights out of that shaft with PB Blaster or a 50/50 mix of acetone and ATF. Try to loosen it up gradually. See if tapping it with a hammer frees it up. You can take the spring off to get it out of the way so it doesn't get damaged.

I'll have to go out and look at my truck to see which position is which.

1950 Chevrolet 3100 (Ol' Roy)

1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1964 Ford Galaxie 500 coupe |1966 Ford Mustang (Little Red) | 1969 Pontiac GTO (The Dishpit) I 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)