Abstract: A method for installing a noise reduction structure within a vehicle driveshaft tube includes the initial step of disposing a reducing sleeve adjacent to a first end of the driveshaft tube. The reducing sleeve may define an inner surface that is tapered from a first diameter, which is slightly larger than the uncompressed outer diameter of the noise reduction structure, to a second diameter, which is approximately equal to the diameter of the first end of the driveshaft tube. Alternatively, the reducing sleeve may define an inner surface that is tapered from a first diameter and then rounded to a second diameter. A source of vacuum is disposed adjacent to a second end of the driveshaft tube, opposite the first end. The source of vacuum may be an accumulator tank and compressor assembly or a venturi arrangement. In any event, the noise reduction structure is disposed within the reducing sleeve and a vacuum is generated such that the vacuum draws the noise reduction structure into the driveshaft tube.