FORD 440-FORD Rear Torsen Gears End Differential 440-1557D 3.73

( Manufacturer Part Number: 440-FORD ), ( Part Type: Gear ), ( Year: 2017 ), ( Condition And Options: Gt, 3.73 Ratio, Torsen Differential ), ( Manufacturer Warranty: 90 Day ), ( Ipn: 440-1557d ), ( Core Charge: No Core Charge ), ( Fitment Type: Direct Replacement ), ( Oe Spec Or Performance/custom: Oem Factory Spec )

Review FORD Torsen 3.73 Gears Rear End Differential Diff Assembly Oem Wty Oe fits MUSTANG 2015–2022

Introducing the Ford 440 Torsen 3.73 rear end differential for Ford Mustangs from the years 1965 to 1973 (models 1965-1972 for the Ford Mustang Fastback and 1965-1972 for the Ford Mustang Coup , except for the 1968-1970 Shelby GT500 and GT500KR which use a 9" rear end). This high-performance differential is an excellent upgrade for Mustang enthusiasts seeking improved handling and acceleration.

The Ford 440 Torsen 3.73 differential is named for its 440 series housing and its use of the advanced Torsen limited-slip differential technology. The Torsen design features a set of helical gears that provide a smooth power distribution between the wheels, reducing traction loss and improving overall traction, especially during cornering and acceleration. The 3.73 gear ratio is ideal for providing a good balance of acceleration and drivability.

This differential is a direct replacement for the stock Ford 9" differential, making the installation process straightforward. It comes with all necessary hardware for installation, including new wheel studs and a new pinion seal. The Ford 440 Torsen 3.73 differential also features a revised pinion flange and an upgraded 1-piece driveshaft yoke to accommodate the larger ring gear.

The housing of the Ford 440 Torsen 3.73 differential is made of high-strength cast iron, providing excellent durability and resistance to damage. The differential also features a heavy-duty spider gears set and a robust ring and pinion gear set, ensuring that it can withstand the demands of high-performance driving.

Additionally, this Ford Mustang rear end differential comes with a limited slip differential lock that provides improved traction in low-traction conditions. The locking mechanism engages smoothly and effectively, ensuring that power is distributed evenly between the wheels, reducing wheel spin and improving acceleration.

The Ford 440 Torsen 3.73 differential is an excellent upgrade for any Ford Mustang enthusiast looking to improve their vehicle's handling and acceleration. With its advanced Torsen limited-slip technology, high-strength housing, and durable gear sets, this differential is a must-have for anyone seeking to take their Mustang to the next level.

The Ford 440 and Ford 15-22 Torsen 3.73 rear end differential are popular options for Ford Mustang enthusiasts who want to upgrade their stock rear end for better performance and durability. Here are some pros and cons of each differential:

1. Heavy-duty design: The Ford 440 is a stronger and more robust differential than the stock Ford Mustang differential. It is known for its ability to handle high horsepower and torque.

2. Improved traction: The Ford 440 has a larger case and larger pinion and ring gears, which provide better traction and durability.

3. Better for high-performance applications: The Ford 440 is a popular choice for Mustang enthusiasts who are looking for improved handling and better performance from their vehicles.

1. Cost: The Ford 440 is more expensive than the stock differential, which can be a deterrent for some buyers.

2. Installation: Installing a Ford 440 requires some modifications to the car, which can be time-consuming and expensive.

3. Weight: The Ford 440 is heavier than the stock differential, which can affect the handling of the car, particularly during hard cornering.

1. Improved traction: The Torsen 3.73 differential is designed to provide better traction and handling, particularly during hard acceleration and cornering.

2. Durability: The Torsen differential is known for its durability and ability to handle high horsepower and torque.

3. Quiet operation: The Torsen differential is known for its quiet operation, which can be a welcome feature for some Mustang enthusiasts.

1. Cost: The Torsen 3.73 differential is more expensive than the stock differential.

2. Installation: Installing the Torsen differential requires some modifications to the car, such as the use of specific axle shafts and yokes.

3. Weight: The Torsen differential is heavier than the stock differential, which can affect the handling of the car, particularly during hard cornering.

Both the Ford 440 and Ford 15-22 Torsen 3.73 rear end differentials have their advantages and disadvantages. The Ford 440 is a stronger and more robust option, while the Torsen 3.73 provides improved traction and handling. However, both differentials are more expensive and require some modifications to install.

If you are looking for improved handling and better performance from your Ford Mustang, and you have the budget for it, the Ford 440 or Torsen 3.73 differential are great options to consider. However, if budget is a concern or you are looking for a more balanced ride, the stock differential may be the best choice for you. Ultimately, the decision comes down to your personal preferences and the specific requirements of your Mustang build.

Details:

SPECIFIC PART NOTES: ,EIW SF041524 CML050124, There can be differences with the ratio or type transmission your vehicle came equipped. MUSTANG 2019 - 2019 5.0L, 3.73 ratio Torsen differential. Proper installation includes replacement of all fluids and external seals. MUSTANG 2020 2022 5.0L, 3.73 ratio.

Warranty does not cover labor.

part #: 440-ford prices

• $599.99-$1242.99

specifications axlpar:

• for models: Mustang
• for makes: Ford
• for years: 2015-2022
• mpn: 440-ford
• part type: Gear
• year: 2017
• condition and options: Gt, 3.73 Ratio, Torsen Differential
• manufacturer warranty: 90 Day
• ipn: 440-1557d
• core charge: No Core Charge
• fitment type: Direct Replacement
• oe spec or performance/custom: Oem Factory Spec

general axlpar:

• Car Truck Parts Accessories > Transmission Drivetrain > Axle Housings Parts
• condition: Used

shipping axlpar:

• cost: $0.00
• type: Fixed
• service: UPS Ground
• class: Standard
• carrier: UPS
• transit: 4-9 Days

seller axlpar:

• city: Pensacola, Florida
• # reviews: 59550
• rating: 99.5%

payments axlpar:

• credit card: Mastercard
• other
• wallet: Paypal

returns axlpar:

• time: 60 Days
• paid by: Buyer
• policy: Returns Accepted

offer axlpar:

• availability: In Stock
• quantity: 1
• sold: 0
• started: April 12, 2025
• options: Ship-to-home
• best offers: True

Ford 440-FORD Is Similar To:

• 01 02 Ford Explorer Rear (24.1% similar) If you choose to pick the item up it starts on day that. The flat rate shipping charge only applies to continental us. Residential services are available, but it is very expensive. AT,4 Dr, sport TRAC,3. Local pick-up is also available. If there was damage make notes on the paperwork and immediately...(June 23rd, 2017)
• 032ds85009-2206 Spicer Ford Explorer Front And Rear Driveshafts Make Offer (25.3% similar) Make an offer, you never know. This front is considered 22. Purchased both new for over will sell together or individually. Pair of brand new driveshafts that will fit a ford explorer. They're not doing me any good taking up space in the garage. 25-INCHES long, and is a brand new spicier unit. I did...(June 17th, 2018)
• 12185 Alloy Usa Axle Set Rear Ford Mustang Spline Pair (23.3% similar) Priced to sell, these are new old stock...(October 31st, 2018)
• 15155 Alloy Usa Axle Rear Right Steel Ford Mustang Each (20.4% similar) Buyer pays return shipping. Axle material 1541H alloy steel type c-clip bearings included no inner splines 31 quantity sold individually. Fitment information may not be available for all products and those without will have a compatibility link...(May 31st, 2019)
• 16192 Rare Parts Ford Axle Bumper Rear For Mustang Piece (25.7% similar) This item has been designed and engineered with the latest in cad programs computer equipment. Safety, steering control, and all around smooth ride are the priorities when designing this replacement part. You can rely on rare parts products to keep your vehicle riding safely and comfortably. They ...(November 2nd, 2018)
• 1966 Ford Mustang Rear Axle (35.3% similar) Bumper assemblies do not come with upper grilles. Do not necessarily come with and are covered under the 90-DAY warranty warrant a return. All parts are used and have come off of vehicles that been driven on roads public private in a state uses salt road the winter months. Steering columns: all ...(February 1st, 2018)
• 1c343002ka 1c343002kb Ford Front Axle Assembly 2001-2005 (27% similar) Quality tested. This includes all requests for photos of a part such as verification the number that is printed on or other photo see below. Addresses within the 48 states Continental us. Dock, forklift, etc or lift gate rate charges will have to be added. It is always a good idea to check if you ...(March 2nd, 2017)
• 1c3z-4234-aa Motorcraft Ford Genuine Oem Excursion Rear Right Axle Shaft (28% similar) 8l V10 - gas ford F-250 super duty 2005 Harley-Davidson edition, king ranch, lariat, XL, XLT all photography is for illustrative purposes only and persons depicted are model's. Higher shipping and handling cost prevail. 4l v8 rear right axle shaft genuine oem ford motor craft parts also known as: ...(July 21st, 2018)
• 1l2z4b422ba Ford Oem Axle Retainer (15.9% similar) V8 gas naturally aspirated. This parts position is left, right. Electrical parts are not returnable...(March 22nd, 2018)
• 1l2z4l537aa Ford New Oem Rh Right Or Lh Left Side Rear (20.5% similar) Title: new oem Rh right or LHS left side rear axle inner boot kit explorer mountaineer identified in schematic if applicable:: brand that is a direct factory replacement for the ford mercury. There is always a member of the Tosca family to meet with customer. Continental us. The Tosca family has ...(August 29th, 2018)