I HAVE ONE IN MY DUSTER, IT IS GOOD NOW. WHEN I BOUGHT IT THE STEEL PARTS ON THE VALVE BODY HAD RUSTED AND I HAD TO REPLACE IT. NO HELP FROM TCI OR SUMMIT. BUY ONE FROM JOHN COPE AND PAY THE SHIPPING. IT MIGHT COST A LITTLE MORE BUT WILL HAVE THE BEST PARTS AND YOU WILL NOT HAVE TROUBLES. INITIAL COST IS SOON FORGOTTEN WHEN THERE ARE NO PROBLEMS.