48RE Transmission Overdrive 4wd Extension Housing 03-On Mopar These housings are subject to breakage for several reasons. When replacing always check U-Joints carefully a common cause of failure. Also shifting into park when not fully stopped can cause breakage. These are brand new Mopar updated housings. These OEM Mopar housings are high quality they are what we sell everyday to Transmission Shops, it fits the A618 48RE 2003-ON Diesel Don't get caught with a lesser quality housing!