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What gear ratio is a Ford L6?

The gear ratio of a Ford L6 engine refers to the relationship between the number of teeth on the engine's crankshaft gear and the number of teeth on the camshaft gear. This ratio determines the speed at which the camshaft rotates relative to the crankshaft, which is crucial for the proper timing and operation of the engine's valves.


What is a Gear Ratio?


A gear ratio is a numerical value that represents the relationship between the number of teeth on two gears. In the case of an engine, the gear ratio is typically expressed as a single number, such as 2.0:1 or 1.5:1. This ratio indicates that for every one revolution of the crankshaft, the camshaft will rotate a specific number of times.


The Ford L6 Gear Ratio


The Ford L6 engine, which is a six-cylinder inline engine, typically has a gear ratio of 1.7:1. This means that for every one revolution of the crankshaft, the camshaft will rotate 1.7 times. This gear ratio is designed to ensure that the engine's valves open and close at the correct times, allowing for efficient combustion and power delivery.


Importance of the Gear Ratio


The gear ratio of an engine is crucial for its performance and efficiency. A properly tuned gear ratio can help optimize the engine's power output, fuel efficiency, and overall drivability. Incorrect gear ratios can lead to issues such as poor acceleration, reduced fuel economy, and even engine damage.


Adjusting the Gear Ratio



  • Changing the number of teeth on the crankshaft or camshaft gear can alter the gear ratio.

  • This is often done as part of engine modifications or rebuilds to optimize the engine's performance for specific applications.

  • It's important to consult with a qualified mechanic or engine specialist when making gear ratio adjustments to ensure the engine's proper operation and longevity.


In summary, the Ford L6 engine typically has a gear ratio of 1.7:1, which is an important factor in the engine's overall performance and efficiency. Understanding the gear ratio and its impact on engine operation is crucial for maintaining and modifying these engines.

How do I know if I have 8.8 or 9.75 rear end?


On the passenger's side upper and lower corners, there's two semi-circular divots that can easily be seen when looking at the cover from straight on. While the Super 8.8's cover has a bulge for the ring gear, it's not anywhere near as pronounced as the 9.75's.



Which is better 3.73 or 4.10 axle ratio?


That 3.73 vs. a 4.10 has a huge impact on engine rpm because you are selecting second gear with a 3.73 to pull the grade, but you can hit third gear with a 4.10. Your engine speed is about 1,000 rpm lower, so temperatures under hood are going to be significantly lower.



What vehicles have a Ford 9.75 rear end?


Popular Applications:

Ford F-1501997 to CurrentRear
Ford F-150 Raptor2010 to CurrentRear
Ford Transit2015 to CurrentRear
Ford E Series Vans1999 - 2014Rear
Ford Expedition1997 - 2014Rear



What is a 3.73 gear ratio good for?


For a truck, it is great for heavier loads where factory gear ratios that are 3.55 or 3.31. In a sports car, 3.73 gears will offer better acceleration while retaining top speed when compared to 3.55 gears that come factory on many sports cars.



What is a 3.55 axle ratio good for?


As truck manufacturers produce transmissions using more gears, the axle ratios will also change. For example, a transmission with more gears might allow a truckmaker to offer a taller rear axle ratio (a 3.55 instead of 3.73) and still provide improved towing and hauling capabilities.



Is a 3.42 rear axle ratio good?


For instance, the 3.42:1 ratio included on many Canyon V-6 and Sierra 1500 models offers a good all-around blend. That said, if you regularly tow heavy trailers or prefer a peppier feel in acceleration, consider a truck equipped with a higher numeric axle ratio.



What Ford has a 8.8 rear end?


Ford first used the 8.8 axle in 1983 model year trucks and is still in production for the Ford Ranger and Ford F-Series. It was also used in the Ford SUVs until Independent suspension replaced the solid axle.



What is the axle ratio for the Ford L6?


L6: 3.73 ratio, electronic locking differential.



What gear ratio is best for gas mileage?


Best MPG ratio
If getting the best fuel economy is priority, then choose the lowest numerical number offered, such as 3.08, 3.23 or 3.31. This applies to highway driving; city driving mpg isn't really affected by the axle ratio. If you do a mix of both, go with the “standard” axle ratio offered by the manufacturer.



How do I find out what gear ratio my Ford has?


To determine the axle ratio of your vehicle, locate the two-digit axle code first, then use your vehicle's towing guide to find the axle ratio that corresponds to that code. If your vehicle has a limited-slip differential, it will be noted as Limited Slip.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.