I will be installing a double deep Mag-Hytec trans pan, Isspro trans temp gauge, Mag-Hytec rear diff cover and Bilsteins all around on my 03 2500 Supercab CTD 4x4. Aside from the front shocks it looks pretty easy but I wanted to know if there are any problems others have had doing these upgrades. Also, since I am not purging the entire system, would it be safest to stay with the stock fluids? Thanks.