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Ford Speedo Gear - 21 Tooth (83-98 Manual)

11 Reviews
Our Price

$14.99

  • Item #53682
  • MPN#53648

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  • Market Price $17.99
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Customer Photos
Features
  • Corrects speedometer for gear changes
  • Red - 21 tooth speedo gear
  • Genuine Ford Part
  • Ford part# C4OZ-17271-A
  • Speedo gear retaining clip included
  • Fits 1983-1998 Mustangs with a T5 transmission
Description
Corrects Speedometer. Changing the rear gears in your Mustang is great for performance, but it will also throw off your speedometer. Now you can correct your speedometer readings with a Genuine Ford Speedo Gear from AmericanMuscle.

Ford Motorcraft Quality. When adding performance parts to your Pony, trust the folks that know it best to provide top quality components that are made to out perform and out last the competition.

Application. This Genuine Ford 21 Tooth (Red) Speedometer Gear is for use with 1983 to 1998 Mustangs equipped with a T5 manual transmission that have changed gear ratios to accurately correct MPH reading of your speedometer. A speedo gear retaining clip is included.

Manual Transmissions with 7 Tooth Drive Gear
  • 1983-1989 T-5 OEM
  • Pre 1993 T-5 Aftermarket
  • 1996-1998 Cobra T-45 OEM
  • All Tremec Transmissions


Manual Transmissions with 8 Tooth Drive Gear
  • 1990-1998 T-5 OEM
  • 1996-1998 T-45 OEM Except Cobra


Automatic Transmissions with 7 Tooth Drive Gear
  • 1983-1989 Automatic Transmissions


Automatic Transmissions with 8 Tooth Drive Gear
  • 1990-1998 Automatic Transmissions

Mustang Fitment: 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 Details

What's in the Box
Hardware included:
  • (1) Speedo Gear
  • (1) Retaining Clip
Installation Info
Tech Specs
Speedometer Chart
Axle Ratio 6 Tooth Drive Gear 7 Tooth Drive Gear 8 Tooth Drive Gear
2.73 - 16 18
3.08 - 18 20
3.27 16 19 21
3.55 17 20 23
3.73 18 21 -
4.10 20 23 -
4.30 21 - -
4.56 23 - -


Transmission 16T 17T 18T 19T 20T 21T
Manual Wine White Yellow Pink Black Red
Automatic Blue Green Gray Tan Orange Purple


Manual Transmissions with 7 Tooth Drive Gear

  • 1983-1989 T-5 OEM
  • Pre 1993 T-5 Aftermarket
  • 1996-1998 Cobra T-45 OEM
  • All Tremec Transmissions

Manual Transmissions with 8 Tooth Drive Gear

  • 1990-1998 T-5 OEM
  • 1996-1998 T-45 OEM Except Cobra

Automatic Transmissions with 7 Tooth Drive Gear

  • 1983-1989 Automatic Transmissions

Automatic Transmissions with 8 Tooth Drive Gear

  • 1990-1998 Automatic Transmissions

Fitment
  • Cobra - 94, 95, 96, 97, 98
  • Foxbody - 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93
  • V6 - 94, 95, 96, 97, 98
  • GT - 94, 95, 96, 97, 98

For use with Mustangs equipped with a T5 manual transmission

Most Helpful Reviews View All

Overall Rating 4.8/5
5/5
outstanding

The solution for my speedo after being off about 20 mph. after swapping from 2.73 to 3.73 The down side, American Muscle was out of stock when i needed it, and is a little frustrating when my favorite

Read More
Helpful (4) (0)

5/5
Speedo gear

Simple change out. This 21 tooth gear corrects for a 3:73 gear change. American Muscle rocks!

Helpful (1) (0)

Customer Photos (1) View All

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Q & A (3 Questions, 1 Answers) Ask a Question

what gear for 4.10 i have a 96 gt it says 8 tooth drive gear but what speedo gear. or do you change it to the 7 tooth drive gear with the 23 tooth speedo gear?

danny0771 Year: 1996 Model: GT

Question Resolved
Good Question (0) (0)
  • Correct, you would need to swap out both for your application. You would need the 7 tooth Drive Gear and the 23 tooth speedo gear to correct your speedometer reading.

    Helpful (0) (0)

    LisaS Year: 1992 Model: GT

Will this correct speedometer for larger tire sizes?

CobraMan1 Year: 1997 Model: Cobra

Be the First to Answer This Question
Good Question (0) (0)

Have a stock 1991 T5 Tranny with 3.73 gears. What speedo gear would I need to purchase?

Ziggy1977 Year: 1991 Model: Other

Be the First to Answer This Question
Good Question (0) (0)

Reviews (11) Write a Review

  • 5 Stars .82 82%
  • 4 Stars .18 18%
  • 3 Stars 0 0%
  • 2 Stars 0 0%
  • 1 Stars 0 0%
4.8

out of 5 stars

10 Customers Recommend this Product

Installation Time:Less than 1 Hour

  • Performance Gain: 3.571429 3.6/5
  • Fit: 5 5/5
  • Bang For Your Buck: 4.888889 4.9/5
Filter By Sort By
  • 5/5 Yes, I recommend this product

    July 11, 2011

    outstanding

    The solution for my speedo after being off about 20 mph. after swapping from 2.73 to 3.73 The down side, American Muscle was out of stock when i needed it, and is a little frustrating when my favorite store don't have the parts

    Adolfo

    Year: 1992 Model: Other Driving Style: Daily Driver

    Helpful (4) (0)

  • 5/5 Yes, I recommend this product

    January 01, 2013

    Corrects Speedometer after gear change

    Use the chart on AM's website and you will find the correct gear for your application.

    Top 250 Contributor

    Jmil918

    Year: 1995 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 2 Wichita, Ks

    Helpful (1) (0)

  • 5/5 Yes, I recommend this product

    June 29, 2012

    Speedo gear

    Quick And easy way to correct your speedo when changing rear end gears. Easy to install great product. Thanks American muscle.

    Darrell

    Year: 1996 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 1 Forsyth,ga

    Helpful (1) (0)

  • 5/5 Yes, I recommend this product

    March 30, 2012

    Speedo gear

    Simple change out. This 21 tooth gear corrects for a 3:73 gear change. American Muscle rocks!

    JimsJams

    Year: 1997 Model: Cobra Driving Style: Show 'Stangs I have owned: 3

    Helpful (1) (0)

  • 5/5 Yes, I recommend this product

    November 10, 2013

    Accurate Speedo

    I changed rear gears from 327 to 373 and this speedo gear made my speedo accurate with the new gears. Checked the accuracy with my GPS and found that speedo was optimistic by 1MPH under 60MPH and 2MPH over 60. That's good enough for me. I don't know how accurate the speedo was before the geae change.

    JohnS01

    Year: 1996 Model: Cobra Driving Style: Street / Strip 'Stangs I have owned: 1 Cape Neddick, Maine

    Helpful (0) (1)

  • 4/5 Yes, I recommend this product

    July 30, 2012

    quick an easy fix

    Iv got a 98 gt that i have been building over the past year an from the fully built rear to the mildly built motor iv bought all of my performance gear from the one an only "American Muscle", an recently installed the 21 tooth speedo gear to try an help my drastic speedometer gain due to my ford racing 4.30s, the 21 tooth speedo gear helped a little but my speedometer is still off a little. Is there a speedo gear with more than 21 teeth? Over all good product.

    built98

    Year: 1998 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 2 Greenwood, DE 19950, USA

    Helpful (0) (1)

  • 5/5 Yes, I recommend this product

    June 29, 2012

    98 cobra

    This speedo gear is the closest ur going to get to stock gears i put in 390 gears on my cobra and work perfect

    conegato

    Year: 1998 Model: Cobra Driving Style: Daily Driver 'Stangs I have owned: 3 Phoenix, AZ, USA

    Helpful (0) (1)

  • 5/5 Yes, I recommend this product

    February 04, 2012

    fast shipping/easy install

    very fast shipping, and the install was simple. remove the bolt holding the speed sensor and replace speedo gear. thanks A.M!!!!!!!!!!!

    mrfoxbody302

    Year: 1993 Model: GT Driving Style: Street / Strip 'Stangs I have owned: 2 San diego Ca

    Helpful (0) (1)

  • 4/5 Yes, I recommend this product

    May 27, 2014

    Speedometer reading

    Replaced the ring & pinion on my 1998 GT from 2.73 to 3.31 . Installed 21 tooth gear to correct speedometer . Now @ approx. 41 / 42 MPH on the speedo , I'm doing 40 MPH per my GPS . Would have to say the product works very well .

    Krissy

    Year: 1998 Model: GT 'Stangs I have owned: 2 Winnipeg, MB, Canada

    Helpful (0) (0)

  • 5/5

    July 02, 2012

    speedo gear

    I was lost trying to figure out the right one for my car, but AM support helped me with all my question and got the right one for my car.

    LM96GT

    Year: 1996 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 1 Lawrenceburg, KY 40342, USA

    Helpful (0) (0)

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