I'm replacing the half shaft on a 06 Grand Prix non super charged 6 cylinder, I got everything out good but I can't seem to be able too get the new on to seat its on the passenger side , I can get the spline part i. About a quarter of the way but it won't go anymore so I'm woundering is the like some type of grease I can use to help it slide in or is there something I'm missing thanx ..