Rear Differential Fluid Replacement
Remove the differential cover, clean all gears, and fill with appropriate fluid. Replace fluid every 30K miles. Labor charge $95.
Fluid cost to be determined by specific make and model.
Rear wheel drive cars and trucks have a rear differential. Some rear differentials have clutches in them. It is important to replace the fluid in the rear differential to protect the clutches and the gears. Most rear differentials require a specific fluid. Some manufacturers require replacing the fluid every 15K miles.