问：回想后桥小齿轮螺母

Hello there, the recall for your 2005 Dodge Ram 1500 only covers adding a retention device to the rear differential pinion nut. This does not require draining the fluid from the differential or opening the rear cover. The differential fluid can become low for many reasons the most common being a leak from the differential cover, or axle seals leaking. If the fluid is extremely low in a differential it can damage the bearings and cause a noise. The best bet would be to have your differential inspected by a qualified Technician such as one from YourMechanic which will inspect therear differential健康）状况。