# New gears = Messed up Speedometer

**URL:** <https://forums.speedlife.net/t/new-gears-messed-up-speedometer/188290>\
**Category:** PittSpeed Automotive\
**Created:** [February 27, 2007, 11:58am UTC](https://forums.speedlife.net/t/new-gears-messed-up-speedometer/188290 "2007-02-27T11:58:28Z")\
**Posts on this page:** 1\
**Showing post:** 7

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**Author:** ![imported\_Sleeper](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/imported_sleeper/32/5939_2.png) [@imported\_Sleeper](https://forums.speedlife.net/u/imported_Sleeper)\
**Post date:** [February 27, 2007, 12:30pm UTC](https://forums.speedlife.net/t/new-gears-messed-up-speedometer/188290/7 "2007-02-27T12:30:46Z")

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> [@Whos ever gotten poison oak????](https://forums.speedlife.net/t/whos-ever-gotten-poison-oak/28363/13):
>
> I dont think they have an open license for tuning Mustangs, since they dont really have a garage or diagnostic equipment. Rodeheaver could probably do it though.
> 
> and I checked, speedo tooth gear wont work on 99-04 stangs, have to go through the ecu to retune it.
> 
> what kind’ve power are you looking to put down with the v6? I know a lot of guys who have supercharged and turbocharged the V6, and made about 350hp or so, and snapped that stock 7.5" rear like a twig. I would’ve prob bought an 8.8 out of a GT and swapped it on, for the cost of opening up the diff, and installing everything, probably would’ve been a bit more, but cheaper in the long run.

Y would u need a license? same thing as power tuner or HP isn’t it?

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