quitbichyn

im installing my4.10s tomorrow with a buddy of mine...but i need gear oil! ive been recommended to go witht royal purple or redline (i think its called)... but i dont know what kinda of gear oil to get. can anybody help me out on this one?

cliffyk

No sense waiting 'til the last minute huh?[/align][/align]Well, you'll need 2.0L (2-1/8 qts) of Motorcraft 75W/140 Synthetic Gear Oil, plus 3.8 oz. of friction modifier (Ford C8AZ-19B546-A or equivalent) to meet the factory specs. [/align][/align]Based upon the recommendation of a well respected shop in Daytona I used Valvoline's 75W-90 synthetic gear oil and 2 oz. of the Ford friction modifier. Most of the synthetic gear oils (including Valvoline, Royal Purple, Redline, etc.) have friction modifiers included in their formulae, however the folks in Daytona like to give it a taste of the Ford FM as well...[/align]