After hitting the differential pedal by mistake, I felt something come back through the pedal. Upon inspection, we found it was not in lock position, but if you push the pedal down it will not come back up and will not lock into differential lock. The return spring is still on the pedal. I can manually push rod backwards to engage and frontwards to disengage. If I unhook the rod from the pedal, I still have to engage manually. The pedal is weak and will not return up on its own.