It seems Spesh have been making Expedition for over a decade with undoubtedly a number of incarnations, so it is impossible to know what forks you have. Nevertheless you could try dripping oil between the stanchion and the lower.
Given they were never expensive bikes and the forks are likely rusty inside, there is a chance that you might like it less when they are free - bouncing like a pogo stick and squealing at the same time can get annoying.