How long will axles last? 2" lifted XT6

I installed a 2" lift on my XT6 and the axles have some nice vibrations coming out of a turn. These are store bought aftermarkets (not my choice, on there when I bought it). Think MWE axles will do better? I have a set so I'll give them a try. I do have the spacers for the front to reduce the angle of the axles if I need to. How long before these things self-destruct? Can I at least drive it for a week or two to work before I get to fixing it?

Gary....hope you don't mind that we've totally hijacked your thread disclaimer: I wrote this over the course of about 2 hours.....as I kept trying things and searching for part numbers and dimensions......so it's kind of a Train-of-thought post. Bear with me.....it's worth it!! so, I just went downstairs and looked. the inner seal is definitely different. I don't have an XT6 seal on hand, but I did have a Beck/Arnley 0523586 (front inner, bought for a '92 legacy L, but good for