6.7 LITER. Trans c'member nut. A solid metal or plastic block with a threaded hole in the center which is used to tighten or adjust the Transmission Support. Engine Cradle Nut. Part cannot be reused/reinstalled. Suspension Crossmember Nut. Suspension Track Bar Nut. Suspension Trailing Arm Nut. Engine Cradle retainer. Suspension Track Bar. Transmission c'member. Transmission Crossmember.