Originally Posted by OG patina
you prob have road grime or other such items jammed in the threads.
so id get an old toothbrush and some wd40, spray the threads good and then use the tooth brush to clean out the threads some.
if it is still stuck then get out a big hammer and a flat head screw driver and hammer it loose that way.
I like that... Be extra gentle with it unless that doesn't work... then you can just beat the crap out of it.
I would recommend getting a large set of channel locks and just crank on i with those before you start to use a hammer and screwdriver, it just gives a much smaller chance of damage.