I drained and refilled the front & rear differentials, transfer case, and 6-speed NV transmission today. I bought the truck in Oct. with 91,500 miles on the clock, and didn't know when, or if, the fluids had ever been changed. Since I'll be towing my fifth wheel camper with the truck, I wanted fresh juice in all of the drivetrain.All of the old fluids looked really good, quite clean with no shiny metal specks, so I'm a happy camper. All of the new fluids are Amsoil.

The engine oil isn't quite ready to be changed, and it, too, looks surprisingly clean.

Many thanks to the DIY threads in this forum, they helped immeasurably to give me the knowledge and confidence to do the job.