Tight axles?

So I pulled it all apart and got rid of lock washers and studs are all loctited up. I did notice on pass side axle that my retaining plate was a bit coned , so I swapped sides with axles and did pass side first and evenly,very evenly as soon as backing plate gets tight things start to tighten up, pulled it out and assembled driver side ,no prob rolls over smooth!?!? Bearings are fully seated. Wheel studs(bolt) do not touch or rub . The only thing I have noticed is between diff tube flange and behind backing plates there were three gaskets?!? Extra space? Tomorrow I will fully undress backing plate and hopefully find something?!