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EXCEL from Richmond 3.90 Gears (94-98 GT)

Market Price $179.99 You Save 11% ($20.00)
Our Price

$159.99

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  • Item 21527G94
  • MPN# F88389

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Features & Details

  • Superior Quality
  • 3.90:1 Gear Ratio
  • 8.8" Ring Gear Diameter
  • For Street or Track Use
  • Made in the USA
  • Fits 1994-1998 GT and SVT Cobra Mustangs
Improve Off The Line Acceleration. Does our V8 powered SN95 Mustang feel a little slow or sluggish from a standing start? If the answer is yes, it is probably because of the lower ratio gear and pinion installed by Ford at the factory. Most 1994-1998 Mustangs came equipped with either 3.08 or 3.27 gears, which work perfectly fine for daily drivers who are looking for good fuel economy, but not for the hardcore performance enthusiast. By upgrading to a set of higher ratio 3.90 Richmond Excel Gears your Mustang will enter its power band sooner which will help improve low end torque for quicker off the line acceleration.

Superior Quality. Richmond proudly manufactures their Ring and Pinion Gear Sets right here in the USA. Using state-of-the-art manufacturing processes and extensive quality control testing, Richmond produces a superior quality Ring and Pinion Gear Set at an excellent price. Richmond is so confident in the quality of their products that they back them with a 6 month, 50,000 mile no-nonsense warranty.

Recommended Upgrade. Please note that when changing the gear ratio of your Mustangs rear differential that the calibration of your speedometer will no longer be correct and will display the wrong speed. However, you can easily fix this annoying issue with a new Speedometer Gear or Ford Racing Speedometer Recalibration Tool (sold separately).

Application. This 3.90 ratio Richmond Excel Ring and Pinion Gear set will fit all 1994 to 1998 V8 Mustangs equipped with an 8.8" solid axle rear end, including the GT and SVT Cobra models. A master bearing kit is recommended by most installers, especially on high mileage vehicles, 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: 1994 1995 1996 1997 1998 Details

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

Approximate RPM for 1994-1995 GT


Manual
Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
1 4053 5674        
2 2393 3351 4308 5265 6223  
3 1600 2239 2879 3519 4159 4799
4 1203 1684 2165 2646 3127 3608
5 806 1128 1450 1773 2095 2417


Automatic
Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
1 2886 4041 5196 6350    
2 1764 2470 3175 3881 4586 5292
3 1203 1684 2165 2646 3127 3608
4 802 1123 1443 1764 2085 2405


Approximate RPM for 1996-1998 GT


Manual
Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
1 4065 5691        
2 2405 3368 4330 5292 6254  
3 1588 2223 2858 3493 4128 4763
4 1203 1684 2165 2646 3127 3608
5 818 1145 1472 1799 2126 2453


Automatic
Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
1 3416 4782 6148      
2 1864 2610 3355 4101 4847 5592
3 1203 1684 2165 2646 3127 3608
4 842 1179 1515 1852 2189 2526
Will it fit my Mustang?
  • Cobra - 94, 95, 96, 97, 98
  • GT - 94, 95, 96, 97, 98

Most Helpful Reviews

3/5
Richmond Gears 3.90

The 3.90 gears really improve your acceleration and are the cheapest way to go faster without sacrificing too much fuel mileage/drivability. I was impressed by the quickness in which my order was received ...

Read More
Helpful (2)

1/5
noisy

Good ratio...VERY NOISY at cruise...and yes it is set up right ..pattern was perfect......replacing with FORD Gears....also Motive Kit for 8.8 did not include any small shims....only 14's and 30's.

Helpful (2)

Overall Rating 3 out of 5 stars
Read All 3 Reviews

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Customer Reviews (3) Write a Review

Overall Rating 3.0

out of 5 stars




  • 3/5

    October 14, 2010

    Richmond Gears 3.90

    The 3.90 gears really improve your acceleration and are the cheapest way to go faster without sacrificing too much fuel mileage/drivability. I was impressed by the quickness in which my order was received to my front door. However, after installing my 3.90 gears (making sure that both the pinion depth and backlash were correct) I noticed a whine. The whine did not subside after the break in period. I contacted AM who was very helpful and was instructed to speak with Richmond. Richmond did not really do anything to help me and hopefully the gears hold up. So far noise is the only problem. If I could do it again I would purchase Ford Racing gears.

    Bill Henry

    Helpful (2)

  • 1/5

    January 09, 2010

    noisy

    Good ratio...VERY NOISY at cruise...and yes it is set up right ..pattern was perfect......replacing with FORD Gears....also Motive Kit for 8.8 did not include any small shims....only 14's and 30's.

    chris s

    Helpful (2)

  • 5/5

    December 11, 2010

    HUGE improvement!

    Bought this as part of a complete rear-end rebuild on a 1995 GT. These gears make a HUGE difference over the stock 2.73 gears. You it makes the car take off so much faster. Good compromise between 3.73 and 4.10's. With an Auto trans the car cruises at between 2800-3000 RPMs going 60-70mph. Only lost about 2-3mpg as well. Only complaint about this is I can't find a speedometer gear for 3.90 gears anywhere. I see other people are mentioning a gear noise but I don't hear it...course my 'stang is rather loud...

    Steel_Venom

    Year: 1995 Submodel: GT

    Helpful (1)

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