What Gears Do I Need?

Discussion in '2005 - 2009 Specific Tech' started by jessedavis82, Jun 17, 2013.

  1. jessedavis82

    jessedavis82 New Member

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    I just purchased a 2005 mustang gt, with a cold air intake, comp cams and longtube headers, also it's tuned if that matters. The car likes to bounce a lot coming out of 1st and the previous owner said the car would be better with different gears. What size gears should I run?

    Thanks
    Jesse D.
     
    #1
  2. SteedaGus

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    Sounds like you are describing wheel hop. I would look at the rear suspension first and see if it still have the factory lower and upper control arms.
     
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    Diode Dynamics likes this.
  3. 08GTCSTurbo

    08GTCSTurbo New Member

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    depending on the cam you have you will need atleast 3.73 gears. the bigger cams will sacrifice driveability with the stock gear but going bigger will improve that
     
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  4. Diode Dynamics

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    It sounds more like a suspension issue than a gearing issue, wheel-hop is pretty common in the S197 if you're running mostly factory suspension components

    +1 on SteedaGus' answer

    Chassis stiffening is a good place to start IMO

    -Nick C.
     
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  5. F. Jason Garriott

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    It could be worn shocks and non-sticky tires.
     
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  6. Dugl

    Dugl Member

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    Just word to the wise about my gear experience. I also have an 05 GT and opted for 4.10 gears, however afterwards I wanted fatter tires and lost a full inch on the diameter, which effectively gave me a 4.30 ratio....still love the acceleration, but plan your mods well.
     
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  7. timjimmy

    timjimmy Active Member

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    Is the car bucking under light throttle or just when you drop the hammer down? Manual or automatic?
     
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  8. Bullitt347

    Bullitt347 man bewbs please...

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    This could have easily been resolved by using one of the online tire size calculators. http://www.discounttire.com/dtcs/infoTireMath.dos This is an example of one such site. You could have found out that a 275/40/18 is within .59" in dia. of the stock 235/50/18 while gaining you 1.58" in section width. That usually works out to just over .8" of tread width per tire. This is another site that compares sizes http://www.tacomaworld.com/forum/tirecalc.php?tires=235-50r18-275-40r18
     
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  9. Husky44

    Husky44 Active Member

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    Gear swap isn't going to fix your problem, and may make it worse. You need to work on tightening up your rear suspension.
     
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  10. Dugl

    Dugl Member

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  11. Dugl

    Dugl Member

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    The problem was that my crystal ball saw lowering the car and not 18" wheels in my future. I will definitely think thrice about naturally aspirated vs fi when Cam shopping. Appreciate the sources u posted.
     
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