If you have a automatic 4 runner the rear end has 373 gears...If it,s a 5 speed then it,s got 411 gears in the ring and pinon.Automatic first generation 6 cylinder engine never got great gas mileage in the first place...With the automatic and the sluggish 6 banger you are always on the gas..This is one reason you get bad fuel mileage...Larger tires on your truck doesn,t help either..
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