Hello all, I've been following the board for ar least 10 years and appareciate all the information. I keep all my vehicles at least 15 years so oil is very important to me. I generally use Amsoil or Mobil 1. My pickup is an 05 Silverado, 150,000 miles, 5.3, 4L60E, 8.625" 10 bolt rear end. It's been an excellent vehicle for me and I plan to keep it 500,000 miles as I believe the iron block LS engines are some of the best ever made. I live in Texas so I currently run Amsoil Signature 10w30 with either a Wix XP or Amsoil EA15K32 filter.
I know it's well overdue but I finally pulled off the cover and drained the rear differential fluid. The fluid itself was mostly black with a hint of amber. There were no large shavings but what appeared to be shiny sand on the magnet and cover. I cleaned the gasket off and cleaned everything else as good as I could. I put it back together with a Fel Pro gasket and Amsoil Severe Duty 75w90. There were no noises or anything like that from the axle, I just don't really know what's normal. The job was pretty easy so I've considered running it 10,000 miles and changing it again to ensure the cleanest oil possible. The whole job only ran a little over $40 plus my time. I can be a bit OCD about these things
I know it's well overdue but I finally pulled off the cover and drained the rear differential fluid. The fluid itself was mostly black with a hint of amber. There were no large shavings but what appeared to be shiny sand on the magnet and cover. I cleaned the gasket off and cleaned everything else as good as I could. I put it back together with a Fel Pro gasket and Amsoil Severe Duty 75w90. There were no noises or anything like that from the axle, I just don't really know what's normal. The job was pretty easy so I've considered running it 10,000 miles and changing it again to ensure the cleanest oil possible. The whole job only ran a little over $40 plus my time. I can be a bit OCD about these things