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GEN 1 (2010-2014) Ford SVT Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
Need Help : 456 gear ratio for 37" tires
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<blockquote data-quote="PorterW1111" data-source="post: 1621941" data-attributes="member: 40826"><p>Sdhq sells the nitro kits. But to be clear they come with all the “parts” you need to change the gears. </p><p></p><p>I add that clarification as this is not a job the average person will be able to do. Special tools are required and precision is key. To be honest this is a job I have an issue trusting most shops to do. 100% find a shop that has done raptor gear changes for the front and rear multiple times.</p><p></p><p>5.13 is not a good idea, the front diff is small and going with a 5.13 the pinon gets too small and can break if your tires were to hook up wrong.</p><p></p><p>gas mileage will go down to around 9-10mpg. </p><p>I have yet to see a truck with gear change that is actually accurate on the gauges even after a tune. But yes you will need a tune. Just saying you may notice your speedo is progressively off.</p><p></p><p>if you are going to do gears it’s also a good idea to change to a larger diff cover. There have been some discussion about the higher capacity square covers vs the ford performance covers, I’ll let you dig on that and see which side you agree with. In short it’s likely your new gears will be hotter so you’ll need more fluid and a cover that is fined to help keep it cool. </p><p></p><p>To help with pricing what I have seen is your looking at $1,200 for the kits and anywhere from 1000-2500 for install.</p><p></p><p>My opinion marginal gains for the cost/risk of exploding a pumpkin.</p></blockquote><p></p>
[QUOTE="PorterW1111, post: 1621941, member: 40826"] Sdhq sells the nitro kits. But to be clear they come with all the “parts” you need to change the gears. I add that clarification as this is not a job the average person will be able to do. Special tools are required and precision is key. To be honest this is a job I have an issue trusting most shops to do. 100% find a shop that has done raptor gear changes for the front and rear multiple times. 5.13 is not a good idea, the front diff is small and going with a 5.13 the pinon gets too small and can break if your tires were to hook up wrong. gas mileage will go down to around 9-10mpg. I have yet to see a truck with gear change that is actually accurate on the gauges even after a tune. But yes you will need a tune. Just saying you may notice your speedo is progressively off. if you are going to do gears it’s also a good idea to change to a larger diff cover. There have been some discussion about the higher capacity square covers vs the ford performance covers, I’ll let you dig on that and see which side you agree with. In short it’s likely your new gears will be hotter so you’ll need more fluid and a cover that is fined to help keep it cool. To help with pricing what I have seen is your looking at $1,200 for the kits and anywhere from 1000-2500 for install. My opinion marginal gains for the cost/risk of exploding a pumpkin. [/QUOTE]
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GEN 1 (2010-2014) Ford SVT Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
Need Help : 456 gear ratio for 37" tires
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