yes the previous owner installed the shock on the diff. and the red cover is what i installed when i first bought the truck But the previous owner BROUGHT me the original tonneau and SCT all the way from Florida to here in Corpus Christi TX. He may have been a member here but i dont know his user name, There was a rear sway bar an Addco but i didnt like the way it was attached so i removed it, if i could see how its suppose to attach properly then id put it back on.