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67ChevyRedneck · 11-21-2018, 09:36 AM

You won't see much of anything at all compared to the #'s you posted. The best my truck has ever gotten with the 700R is 17 mpg - 100% highway at 60-65 mph (it's happy zone). It drops to 15 at 70-75 and I only get 11-12mpg most of the time "around town."

I did my 700R swap to get my RPM's down, but I already had a 3.73 rear.

11-21-2018, 09:36 AM	#9
67ChevyRedneck Hittin E-Z Street on Mud Tires Join Date: Nov 2004 Location: Greenville, SC Posts: 23,090	Re: Increase in gas milage You won't see much of anything at all compared to the #'s you posted. The best my truck has ever gotten with the 700R is 17 mpg - 100% highway at 60-65 mph (it's happy zone). It drops to 15 at 70-75 and I only get 11-12mpg most of the time "around town." I did my 700R swap to get my RPM's down, but I already had a 3.73 rear. __________________ Jesse James 1967 C10 SWB Stepside: 350/700R4/3.73 1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc 1968 Pontiac Firebird: Project Fire Chicken! 2015 Silverado Double Cab 5.3L Z71 2001 Jeep Wrangler Sport 4.0L 5spd 2020 Chevrolet Equinox Premium 2.0L Turbo 2011 Mustang V6 ~ Wife's ride American Born, Country by the Grace of God 1967 CST Shop Truck Rebuild! My 1967 C-10 Build Thread My Vintage Air A/C Install Project "On a Dime" Trying my hand at Home Renovation! 1965 Mustang Modifications!