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Differential is screamimg

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Old Jul 11, 2018 | 05:35 PM
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Default Differential is screamimg

only when coasting so it seems there is a backlash issue. I have an aftermarket warranty on this so I am going to have it changed. Question is should I put in a direct replacement (2:73) or go with a shorter gear like a 3:42? It is an 11 GS A6 that I want to autocross on occasion but will also be a daily driver.
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Old Jul 12, 2018 | 02:04 PM
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3.42 is a good all around street gear. Youll never go back to 2.73 thats for luxury cars. Money well spent!
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Old Jul 12, 2018 | 04:57 PM
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More gear will make the car feel more responsive and make the higher gears more usable. The tradeoff is highway cruising rpms will be 300 - 400 rpm higher. For local highway trips, it is a benefit as the car is more responsive in 6th gear. If you take long trips, you may prefer the taller gears.
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Old Jul 12, 2018 | 05:14 PM
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Shorter gears are fun, I am running 4:10's in my manual C6.

Ya more fuel consumption but if I keep it under 75 I can still see near 26 mpg. Got 25.5 mpg on a 1200 mile trip with some extended 100 mph plus hours.

Hot rodding around town though will have a greater reduction in fuel savings.
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