Is a 4:10 Gear Ratio the Best in a '90 GMC Jimmy?
All vehicles, including the 1990 GMC Jimmy, have specific axle gear ratio ranges as stipulated by their manufacturers. A good gear ratio, such as 4:10, allows the most power transfer from the engine and transmission to the rear wheels.
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Identification
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A 1990 GMC Jimmy is a sport utility vehicle with 4X4 capabilities. An axle gear ratio is a comparison of the ring and pinion gears to the rear axle gears. A 4:10 gear ratio is a lower axle gear combination, providing high engine RPMs and fast acceleration, states Car Craft Magazine.
Features
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A 4:10 gear ratio is best for a 1990 GMC Jimmy if the driver requires a fast initial acceleration from a complete stop. A higher gear ratio, such as 3:08, would suffice if the driver would like fast acceleration while at freeway speeds.
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Considerations
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The 4:10 gear ratio benefits the 1990 GMC Jimmy in an extreme situation, such as climbing a steep hill. The Jimmy will climb off hills faster, and with more torque, in the lower gear ratio.
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