Sorry if this has been asked before, I tried to look through the billion 4x4 threads and didn't see anything.

I'm in the process of doing a posi-lock setup for the front axle, but right now I have it set up to where I pull the cable out and hold it with vise-grips to lock in the axle. Lately, though, the cable doesn't come out as far, amd when I check the driveshaft (with the truck in neautral, and t-case in 2wd) it just spins.

Could the actuator cable be sized in the outer cable, preventing it from coming out? Or maybe a problem in the front diff itself?

Thanks in advance.