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1979 Ford F 150 On The Street

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After upgrading to a 4-inch BDS suspension and 35-inch General Grabber tires we noticed our old Ford lagging on-road. The large tires were hard to get moving with the stock 3.50:1 axle gear ratio, and acceleration was dismal at best. However, in sweeping turns the open differentials did their job just fine, allowing the inner and outer tires to turn at different speeds.