shift linkage?

Hey guys, need some help. Today my shofter started acting up… normally when you move to the left or right of the gates it comes back to the middle. But when i move mine it is forced and it stays at whatever side i leave it at… im thinking i need to lube the shifter linkage? but i dont know if thats the problem or how to go about it… Help would be appreciated,

when’s the last time you changed your tranny fluid?

not too sure, im guessing 75000? could that possibly do that though? i dont think it looks bad.