Guaranteed Free Delivery by 12/24! available on most items - Details

Talk to a Mustang Expert
1-877-887-1105
Every day 8:30AM EST - 11:00PM EST
Win $3,000 In Mods!! Enter Daily!

Richmond Ring Gear and Pinion Kit - 3.73 Gears (05-09 GT)

Market Price $258.51 You Save 9% ($23.50)
Our Price

$235.01

FREE Shipping

  • Item 66501G05
  • MPN# 66501G05

Will this fit your Vehicle?

In Stock Ships same business day.
Ship to: Ashburn - 20149
Sorry, please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.
    Create a list
    Add to New List

    Saved - View your saved items

    We're sorry. We couldn't save this product at this time.

    Features & Details

    • Exceptional Quality
    • Handle Extreme Torque Applications
    • First-Run, Never Recycled Materials
    • 3.73 Gear Ratio
    • 8.8" Ring Gear Diameter
    • 2-Year / 100,000 Mile Warranty
    • Fits 2005-2009 GT Mustangs
    Get Going. If you want to improve your acceleration from a stop in your 2005-2009 GT Mustang, you'll want to invest in a steeper gear. This 3.73 Richmond Ring and Pinion would be a great option and allow your V8 Pony to get to the power band faster. One of the highest quality gears on the market, you can't go wrong with Richmond in your high performance Mustang.

    Superior Quality. Manufactured right in the United States, Richmond Gear uses only the highest standards to produce the highest quality gears in the industry. Inspected and scrutinized to deliver gears with acceptable tolerances, durability and fit, Richmond ensures only the best in machining, finishing and heat treating of their drivetrain components.

    Recommended Upgrade. When changing the gear ratio of your Mustang's rear differential, the calibration of your speedometer will no longer be accurate and will display the wrong speed. However, you can easily fix this annoying issue with a Tuner or Recalibration Tool (sold separately).

    Installation Notes. An Installation and Bearing Kit is highly recommended by most installers, especially on high mileage Mustangs. Please see ordering options above.

    Warranty. Richmond Gears is so confident in the high quality of their ring and pinions that they are backed by a 2-Year / 100,000 Mile No-Nonsense Warranty.

    Application. These Richmond 3.73 Ring and Pinion Gears will fit all 2005 to 2009 GT Mustangs equipped with an 8.8" rear end.

    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 your gears are installed. See ordering options above.

    Fitment: 2005 2006 2007 2008 2009 Details

    CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

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

    Approximate RPM for 2005-2009 GT


    Manual
    Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
    1 3888 5443 6998      
    2 2301 3221 4141 5061 5981 6902
    3 1518 2126 2733 3340 3948 4555
    4 1150 1610 2070 2531 2991 3451
    5 782 1095 1408 1721 2034 2347


    Automatic
    Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
    1 3704 5185 6667      
    2 2634 3688 4741 5795 6849  
    3 1771 2480 3189 3897 4606 5314
    4 1150 1610 2070 2531 2991 3451
    5 817 1143 1470 1797 2123 2450
    Will it fit my Mustang?

    You Might Also Like

    Customer Photos

    More Products You Might Like

    Q & A

    No questions about this product yet.

    Ask the First Question

    Customer Reviews (1) Write a Review

    Overall Rating 5

    out of 5 stars

    Installation Time:Shop Install

    • Performance Gain 5 5
    • Fit 5 5



    • 5/5

      Installation Time: Shop Install

      January 24, 2017

      A must have for your mustang

      Just what I want! My car takes off with no hesitation now! Absolutely love, I can't stop just driving around in my car!

      Mustanggirl

      Year: 2007 Submodel: GT

      Helpful (7)

    Related Mustang Categories