Ford Performance Ring And Pinion Gear 3.73 Set 8.8" IRS 2015-2020

Ford Performance:
M-4209-88373A
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Highlights

  • For 8.8" Irs Center Section
  • 3.73:1 Gear Ratio
  • Includes OEM Cursh Sleeve
  • OEM Quality
MSRP $249.00
$174.99
You save 30%

Ford Performance 3.73 Ring and Pinion Gear Set for all 2015, 2016, 2017, 2018, 2019 and 2020 Mustangs with the 8.8" IRS Rear End.

Ring and pinion sets have proven to be one the most popular modifications for just about any Mustang owner. So much about how your Mustang feels can be controlled by replacing the factory Ring & Pinion Gears in your 2015-2020 Mustang. Whether you’re looking for faster acceleration or a higher top speed, with this set from Ford Performance , you’ll have the correct top quality parts to take full control over your S550.

All Ford Performance (formerly Ford Racing) Ring and Pinion Gear Sets are made in the United States at Ford's Sterling Axle Plant. The lower the ratio (higher the number), the quicker your car will accelerate and you will feel the difference in the "seat of your pants." Ford Performance’s 8.8" gears are the choice of championship road racing and drag racing teams around the world. Featuring OEM quality, a superior surface finish, hardening and strict manufacturing consistency, this gear set will provide you the strongest and quietest performance on the market today!

Features and Benefits:
- Strong Unmatched Forged Construction and Quality
- Quiet Worry-Free Performance
- Corrosion Resistant Black Oxide Finish
- Perfect for Street or Track Use
- Made in the U.S.A.
- Professional Installation is Highly Recommended

Please Note: Requires M4210B3, the 2015-2020 Ford Performance 8.8” IRS Ring & Pinion Installation Kit

*Will NOT fit earlier 8.8-inch straight axles found in previous generations.
*Will NOT fit 2015-2020 Mustangs originally equipped with a rear-end housing with factory installed 3.15 gears. 

Tech Tip: After installation of your new FRPP 3.73 Ring and Pinion Gear Set, you will need to adjust the rear axle ratio in the body control module in order to re-calibrate your speedometer. This can be adjusted for if you have previously purchased one of the new Ford Performance Power Packs for the 2015-2017 Mustang.

If you're looking for parts for your 2015-2020 Mustang, you should start by looking at the several Mustang parts that CJ Pony Parts offers from Ford Performance (formerly Ford Racing). By buying your Ford Performance parts from CJ Pony Parts, you know you're getting your Mustang parts from a reliable, reputable dealer, since CJ Pony Parts is a Top 10 Ford Performance Dealer and has been for the last 10 years. When you buy your Ford Performance Mustang parts from CJ Pony Parts, you know you have a winning combination.

Installation Videos

Vehicle Fitment

This product will fit the following Mustang years:

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I have 2019 PP1 automatic and want to up grade from 3.55 to 3.73. What would I need to do.

Asked by: ReyM
You will need M-4210-B3 and M-19546-A12.
Answered by: rk cjpp
Date published: 2019-11-04

Installed 8'' rear end in a 65 Mustang with a 331 engine putting out 408 HP on the dyno. The gears are 2:80. It has a T5 tranny. Would 3:73 gears be better? Installed 15'' tires. What do I need for the speedo gear?

Asked by: mmustang
The 3.37 would be a better choice. Not sure about the gear you would have to see how far off the speedo is off after the installation. More teeth will slow down the speedo, less teeth will speed up the speedo. One tooth is good for about 5mph.
Answered by: rk cjpp
Date published: 2019-05-01

Will this fit a 2015 F150 8.8 34 spline?

Asked by: Jsvacina
No it will not.
Answered by: rk cjpp
Date published: 2019-02-27

Hello. i have an mustang ecoboost 2015 with housing factory installed 3.15 gears, and i want to upgrade with the kit Ring And Pinion Gear 3.73 Set .is that possible to done?

Asked by: GIORGOS
I have to change all the differential so I can use this extractor;
Answered by: GIORGOS
Date published: 2018-12-20

I have a 2015 gt with auto trans, It has 315 gears I want to go to 373's. What would I have to buy to make this work.

Asked by: Franke
Requires P/N: M4210B3, the 2015-2018 Ford Performance 8.8” IRS Ring & Pinion Installation Kit
Answered by: CJPP Dave
Date published: 2019-05-22

Hi, I have a 1969 mustang with a differential 3.00, what kind of ring pinion do you recommend for more acceleration?

Asked by: Rfg89
That depends on what kind of driving you will be doing. 3.55 or 3.73 will work. We would need to know what size rear end you have 8 or 9 inch.
Answered by: rk cjpp
Date published: 2019-05-22

i have a 2018 automatic 5.0. i want to switch to 3.73 gears but i do not know which factory gears i have now. i would like to know which gears are in there now

Asked by: lildyl
It should say on your window sticker. If not, you can have your local Ford dealership look up your VIN and they can provide you with that information.
Answered by: CJPP Dave
Date published: 2019-05-22

I have a 2015 ecoboost and considering a gear change to achieve better acceleration. I have a ford performance tune but the acceleration, in my opinion, is still slow and sluggish. What gear ratio would you suggest? I have 235/50 R18 tires.

Asked by: davey2
I always recommend 3.73 gears.
Answered by: CJPP Dave
Date published: 2019-05-22
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