I have a 4" lift in my ride. When I went to bolt the rear drive shaft back up after changing joints, I noticed the splines were sticking out of the slip yoke a bit. I still have about 2" of spline inside the yoke. I did notice there is a little play when I push the shaft up and down. When I twist it, it is tight. Is the anything to be worried about or do I look at getting a longer shaft?