AmericanMuscle is proud to offer FREE SHIPPING on any order over $119!
Free 2-3 Day Delivery on most items, see Product Page for details.
Free Shipping Offers are for Standard Ground Delivery Service and are only valid for shipping addresses within the 48 contiguous United States. Truck freight and oversize charges still apply unless otherwise noted, and can only be shipped to the lower 48 States.
Shipping to Alaska and Hawaii will require an additional charge.
If you're looking to improve the acceleration and off-the-line performance of your Mustang, stepping up to a numerically higher gear ratio is a great way to do so. Now the Ford Performance 3.73 gear set and install kit will be from one of the most trusted names in parts for your '86 to '09 V8 Mustang, with the 8.8 solid rear axle. Now this kit will include a brand-new ring and pinion as you guys can see, along with everything you need to get them in place.Price point for the 5-star rated kit will be in the mid to high $200 range, and the install will not be for the timid or inexperienced mechanics out there so let's call this one a full-blown 3 out of 3 wrenches on the difficulty meter with a little bit more detail on that later in the video. So it's no secret that most of the factory gear ratios for the earlier cars like the Fox Bodies, and the SN95s, and even some of the early S197s weren't exactly ideal for off-the-line performance and acceleration. In fact, it was quite the opposite.Now most of these earlier cars were working with either a 2.73, a 3.08, or in some cases a 3.27 gear until some of the early S197s ushered in an optional 3.55 ratio. And with all that said, again, a great way to increase your off-the-line performance and acceleration without even adding horsepower is to install a numerically higher gear ratio or a shorter gear as they're sometimes referred to as.Now doing so will help you get through those gears a little bit faster and get you up to speed quicker. But the only drawback being a slight hit to your fuel economy, depending on how aggressive you go. But, with the days of overdrive manual and automatic transmissions, it's not nearly as bad as it used to be back on the old four-speed cars.But getting into the kit that we have here and with that fuel economy thing in mind, I would argue a lot of people would probably prefer the 3.73 to a more aggressive 4.10 or higher gear ratio, because, depending on your factory ratio, you are still getting a much shorter gear with the 3.73, especially if you had a 2.73 car or even a 3.07 car. So, the car basically is going to feel totally different but without turning more RPM while cruising on a highway like you would with a 4.10 or something higher. Basically, it's gonna be a great compromise. Now as far as your physical construction of the gears are concerned, well, really nice stuff here from Ford Performance, and that is what we've come to expect from anything with the blue oval on it. We're gonna be looking at the strong forge construction throughout, CNC cut, of course, along with the lapped teeth all finished in that black oxide coating.Now the gears had been made in the USA, and Ford Performance likes to tout that these are gonna be some of the quietest gears you'll find available in the after-market. But on the subject of noise, it is important to point out, for me, that a lot of times the noise might not be coming from the gears themselves but rather the install or the setup of the gear or rather the ring and pinion, which does lead us into the next part of our product here. And that is the installation kit. And while I don't have every single part on the table with me for this video, you will be receiving everything you need to get the new ring and pinion installed and set up in your V8, and that does include brand new bearings, new seals, new shims, crush sleeves, pinion nut, gear marking compound and brush to check the pattern in-depth, your diff cover gasket, and even a couple of quarts of the 75-90 Royal Purple gear oil in addition to the 4 ounces or 3.8 ounces of the required friction modifier.So a very complete kit is what I'm trying to say here, guys, at the end of the day, and one that will be beneficial to either you or your mechanic when it comes time to get everything installed. And speaking of the installation, listen, getting gear set up properly can be a bit of an art form and does involve a bare amount of work under the car in addition to using some specialty tools like the press, the dial indicator, and things like that.So because of this, we're gonna call it a full three out of three wrenches on the difficulty meter. Those of you who have done this in the past knows what's involved, so, yeah, no problem locking this out and you're definitely gonna save yourself some money when it comes to labor. On the other hand, for the novice mechanics out there who really aren't too familiar with this sort of thing, you might wanna get this one installed by your local shop. It's not a fun day in the garage. And again if you don't have access to all the specialty tools, it can lead to a noisy operation. Typically labor for a job like this will vary depending on your area, of course, but I'd say a ballpark of 500 bucks, give or take, is what you can expect for the labor here. But again if you've done this before and you know what to expect. On the other hand, I would strongly recommend getting this one knocked out by your local shop.Another big thing to keep in mind when making the change to a different gear ratio is the change or effect that this will have on your speedometer, and it will need to be corrected. Now you have a couple of different options, '79 to '98 cars or V8 owners out there, you can simply replace your speedometer gear. It's gonna be the most cost-effective way to go about doing so. '99 and newer cars, on the other hand, with that VSS sensor, you can either fix this through a handheld device or tuner, or you can look into a speedo recalibration box from a company like Ford Racing, for instance, on the site here for a couple of hundred bucks. But in closing, guys, if you're looking to really kick up that off-the-line grunt of your V8-power Mustang, improve your acceleration and your ETs, a set of 3.73s from Ford Performance would be a great choice, and you can grab yours right here at americanmuscle.com.
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. This Ford Racing Ring and Pinion Gears are perfect for street, road, or race use.
Complete Kit. This Ford Racing Gear and Installation Kit comes complete with all the components needed to swap out your ring and pinion gear. It includes Ring gear, Pinion gear, 1 bottle of Friction Modifier, 2 bottles of 75w90 Gear Oil, gaskets, seals, shims, bearings and all the required hardware.
Legendary Ford Racing Quality. When you're adding performance parts to your Pony, you can't go wrong by installing parts from the folks that know it best. Ford Racing's legendary quality ensures years of hassle-free use.
Application. This Ford Racing 3.73 Rear Gear and Installation Kit is designed for use with 8.8in solid rear axle equipped Mustangs, including the 1986-2009 GT, Bullitt, Mach 1, Shelby GT500 and 1994-1998 SVT Cobra. It will not fit the 1999-2004 IRS equipped Cobra Mustangs.
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.
Extended Warranty. AmericanMuscle/Turn5 Inc. is proud to offer an optional 12 month extended limited warranty to our customers that purchase an eligible product. The program administrator will replace the cost of the covered part of a period of 12 months after the manufacturers warranty elapses, or from the date of purchase if the manufacturer does not offer a warranty.
Coverage. A Covered Part has failed when it can no longer perform the function for which it was originally designed solely because of its condition and not because of the action or inaction of any non-covered parts. The benefits available under this Limited Warranty are strictly provided to you for the replacement of the Covered Part(s) which fails due to a defect.
Notification Sent Via Email. You will receive notification of your enrollment in the extended product warranty program via email within 24 hours of placing your order. Please save this email for possible future reference.
No Deductibles Required. There are no deductibles required for use of this extended product warranty. If your covered part fails within the extended warranty time frame, simply call the program administrator at 1-844-870-4881 for instructions before any repairs or replacements have begun. Additional contact details and instructions will be included in your confirmation email.
WARNING: Cancer and Reproductive Harm - 
