TSB 04-24-5 and 04-24-20 Question

Does anybody know what those 2 recent TSB stand for (see below)?

On my car I have an annoying clunking noise when I drive over bumpy roads. I thought it's because of lowering the car, but it doesn't seam like.


04-24-5 DEC 04 A/C/Audio - Defroster/Antenna Grid Diagnosis/Repair

04-24-20 DEC 04 Drivetrain - L/S rear Axle Shudder/Chatter

Thanks

I got the Eibach Pro System plus (springs, struts, sway bars) and no else supsension mods. Since the installation I noticed this clunk. The drop was about 1". I had the kit installed through a Mustang shop (what I heard it's a good shop) and had them check the installation again. Unfortunately I couldn't reproduce the noise with the shop owner in my car because the roads were too smooth around the shop. While I installed the mid-pipe and mufflers I could convince myself that everything was tight and nothing interferes with the movement of the axle. Rocking the car through the rear bumper doesn't make noise .