Those plastic seals will only keep larger debris out of the tubes. Since they don't actually "seal" anything, mud will be allowed into the tube.I just swapped out my axles for tj ones and it was a biotch and I dont wanna do it again anytime soon. There wasnt much dirt in the tubes before and I would like to keep out rocks, gravel, and some mud if I could. And that pic is of my not destroyed one.