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Ford Performance 4.56 Gears (05-09 GT)

1 Reviews
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  • Item #50385G05
  • MPN# M-4209-88456

  • Market Price $189.99
  • You Save 11% ($20.00)
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  • Ford Racing Quality
  • Strong Forged Construction
  • 4.56 Gear Ratio
  • 8.8" Ring Gear Diameter
  • For Street or Track Use
  • Fits 2005-2009 GT, Bullitt and GT500 Mustangs
Improve ET's and low end torque. Are you looking to get more low end grunt off the line and lower ET's at the same time? Then look no further than installing a set of steeper gears in your Pony. Ford Racing Ring and Pinion Gears are perfect for street, road, or race use.

Superior Quality. These Ford Racing 4.56 Mustang ring and pinion gears feature a super strong forged construction, CNC cut & lapped gear teeth, and a black oxide finish to resist corrosion.

Recommended Upgrade. Changing the rear axle gear ratio will throw off the calibration of your Mustangs speedometer, but a Ford Racing Speedometer Recalibration Tool is an inexpensive way to fix this issue.

Application. This Ford Racing Ring and Pinion Gear set will fit all 2005 to 2010 V8 Mustangs including the GT, Bullitt and GT500 models. A master bearing kit is recommended by most installers, especially on high mileage vehicles, see drop down option above.

Please Note. Due to the high numeric gear ratio, it will require a notched gear cross pin for proper installation.

Attention 2010 and newer Mustang Owners. Starting in 2010 Ford changed the inner rear gear pinion bearing in all 8.8" equipped Mustangs. Because of this you will require a new 8.8" rear gear pinion bearing (Ford part# 9L3Z-4630-A) for proper installation, please see drop down option above.

Technical Note. Installation costs will vary, but a good rule of thumb is between $250 and $300. Be sure to work with a reliable shop that you trust for installations. You can also save money on your installation labor by having your Trac-Lok rebuilt at the same time as your gears are installed, see drop down option above.

Fitment: 2005 2006 2007 2008 2009 Details

What's in the Box
  • (1) Ring gear
  • (1) Pinion gear
Installation Info
Tech Specs

Approximate RPM for 2005-2010 GT

Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
1 4753 6654        
2 2812 3937 5062 6187    
3 1856 2599 3341 4084 4826 5569
4 1406 1969 2531 3094 3656 4219
5 956 1339 1721 2104 2486 2869

Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
1 4528 6339        
2 3220 4508 5796      
3 2166 3032 3898 4764 5630 6497
4 1406 1969 2531 3094 3656 4219
5 998 1398 1797 2197 2596 2995
Will it fit my Mustang?
  • Bullitt - 08, 09
  • GT - 05, 06, 07, 08, 09
  • GT500 - 07, 08, 09

Customer Photos

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Q & A

Ask a Question

My 2007 Mustang GT is currently at the Ford Dealership to replace my gears. I'm bumping from stock to the 4.56's. The Master Tech is informing me that these Ford Parts don't fit my Mustang, even though on their own website it states that this product is compatible (specifically they claim that the Pinion Gear shaft is too large to fit in the bearing). Has anybody else had this issue? Something doesn't sound right to me and I just want to know if anybody has had this issue and how they fixed it. Thanks.


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Customer Reviews (1) Write a Review

Overall Rating 5.0

out of 5 stars

Installation Time:Shop Install

Installation Cost:$250-$500

  • Performance Gain 5 5
  • Fit 5 5

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $250-$500

    November 11, 2014

    Contemplating 4.56 or 4.10 gears?

    As they say, don't fear the gear! Yes, they're better suited for the track but driving around town is easy. Cruising on the highway isn't bad. I hover around 3K RPMs if cruising just under 80mph. It's like having a 6-speed but staying in 5th gear. I think the key ingredient for 4.56 gears are taller rear tires. I'm running 295/45/18s (28.4" tall) and it works well. If you have plans for taller tires, go for taller gears. Hope this helps!


    Year: 2005 Submodel: GT Southeastern, MA

    Helpful (1) (0)

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