ok so after these 2 inch readylift spacers, this is what i had to replace after a trip on the dunes on a TX beach followed by mudfest in Louisiana.... both locking hubs, both half shafts..and the transfer case.... long story short...on road there is no problem but when you have spacers installed and head offroad for the day the issue is different...the front shocks get a chance to finally extend all the way and this is what happens.....vacuum lines are pulled from their clip housings.. coil springs hit upper A-arms, upper ball joints wear out allot faster ..half shafts work past max angles..which cause ends to try to pull through hubs, breaking the weak spring/locking plates.. bind CV joints on hard acceleration and destroy them. leading to a chain reaction of other issues,,,,point is dont use SPACERS....only perch adjustment ..