The VOP (Video Original Poster) performs this oft overlooked task on his 1995 (But VERY Low Mileage) GMC Suburban Rear Differential… But his clever tactics and procedures will be 'universally' appreciated if employed on practically ANY SUV or Truck when the need to Change the Differential Fluid arises. Follow the GM Recommended Types of Fluid ...whether for Organic 75/90W Gear Oil... or for the use of Synthetic Gear Oil...and that means "Adding in The Additive" as well if any is called for:
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