I wouldnt touch them. I would replace them if i suspected problems. How many miles on them? they should be good for over 150k miles. the dog bones (X) is what i think your talking about. Isin there a bubble on one side and an insert on the other? then you have a retainer that holds those dog bones down. I beleive there is only one way to put them on and i think you will be able to see that at final assembly. Im almost positive the bubble side goes up. I cant fully remember, the last time i dealt with this was back in october