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    New to Mustangs

    I have an '06 v6 and I agree with the folks suggesting you look at the v8s - for the simple reason that the differential sucks. I got tired of only one wheel spinning so I had a new differential installed with 3.73 gears. I also put on front and rear GT anti-sway bars and lowered it; so it's...
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    New 3.73 gears, new tune, speedometer is incorrect

    I took it back to the shop that did the original work. They knew a car computer guy. I'm not completely sure what he did but the car seemed to be set on 3.90 gears. He flashed it with his tuner and it seemed to take. One of the mechanics knew the local police and had an officer come out with...
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    New 3.73 gears, new tune, speedometer is incorrect

    Correct. My tires are the 215/65R16s. I have not put on the 235/50R18s yet. The Ford dealer gave me the print out showing the correct tire size and gear ratio. What are the chances that American Muscle sent me 4.10 gears by mistake and the garage didn't catch it. And I didn't bother to look...
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    New 3.73 gears, new tune, speedometer is incorrect

    I bought the bama x4-xf4. The tune had the correct 3.73 on the tune. Thanks for the suggestions. We re due for snow this Sunday so I probably won't get it up on stands until next week. Have to do my daughter's car brakes this weekend too.
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    New 3.73 gears, new tune, speedometer is incorrect

    I have a 2006 4.0L V6; I'm the original owner. Had a garage install new Auburn limited slip differential and new 3.73 gears. They said they could not flash the PCM. Speedo registered 50 mph and a radar sign indicated I was only going 42-43 mph. Took it to a Ford dealer and they set the PCM to...

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