Need some help with my rear axle, it leaks, but not at seal. I cleaned everthing to take apart and put new seal in when I discovered the leak is in the splines. What is most troubling is the washer behind the nut will spin. I am not sure whether to tighten the nut downso it will stop spinning. I am afraid I will change the prelaod on the pinion bearings. Does anybody have any thoughts?