The fluid fill capacities will take close to 4 quarts (8.8pints) in the 11.50 AA rear differential and approximately 3 quarts in the front differential. The front and rear diff gaskets are reusable. I've recently replaced my
diffs with Royal Purple 75W/90 synthetic in both the front and rear.The fluid of your choice must meet or exceed GL-5 specification. Valvoline Synpower and Mobil 1 are ...