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Why do four wheel drives come with slightly different gear ratios front to rear?
Wiki User
∙ 13y ago
They used to both be the same in the 4.10 to 4.56 range because when you go into 4 wheel low you effectively double the gear ratio to deliver maximum power at low speed. However, the draw back was that gear ratio's in the 4.00 range offered terrible gas mileage. To compensate manufacturers now offer a more fuel efficient gear package that gives you a better return on the highway and doesn't negitively affect off road performance. It took some doing in the engineering department to figure the exact ratio's to use because if they didn't marry up pretty well one axle would more or less be pushing or dragging the other axle.
Wiki User
∙ 13y ago
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