Cadillac CTS-4 Diff Fluid Change Made Easy & RPO Codes | Netfix Original Series: CTS-4 Build | Ep 2

Simple and Cheap Cadillac performance/maintenance upgrades. I went with Amsoil 75w90 gear oil and Amsoil Limited-Slip Additive. I searched and searched for the best product I could find and trust. I chose Amsoil over Motul only because I could get it from my local Napa dealer (Cres). Both products I believe to be very effective. Changed the fluid in both front and rear differentials and added 4oz Limited-Slip Additive in the rear diff. If you missed the RPO code in the video for LSD, all General Motors vehicles code is G80. Can be found typically in glove box or spare tire trunk area. I had difficulty finding what type of fluid (with or without LSD additive) went in the front diff but the GMC dealer verified it was also 75w90. Next fluid change will be interesting as I will be tackling the transfer case which takes a special Transfer Case Fluid from the GMC dealer (AcDelco). Fill plug on the transfer case is in a very tight spot. I look forward to figuring out any potential tips and tricks to help everyone else out. Product Info GM RPO Codes: http://www.angelfire.com/ny2/96transa... Amsoil 75w90 Severe Gear Oil: I purchased from Napa Canada for $25.73 per quart https://www.amsoil.com/shop/by-produc... Amsoil Limited-Slip Additive 4oz: I purchased from Napa Canada for $19.12 https://www.amsoil.com/shop/by-produc... MV7201 Fluid Evacuator Plus I purchased from Napa Canada for $175.00 https://www.skf.com/mityvac/products/...