Hello - I am having my 08 Tacoma looked at for the rear leaf spring TSB. I gave them the TSB number as well as told them my part number matches the number on the TSB for the old part. Also told them I was having a harsh ride and it bottomed out a couple times with a heavy load. They said to bring it in, they know what to look for to determine if it needs to be done. Any extra advice is much appreciated just in case I need more ammo to convince them in case they give me a hard time.