What gear ratio is a Subaru rear differential?
The gear ratio of a Subaru rear differential is an important factor that affects the vehicle's performance and handling. In this article, we'll dive into the details of Subaru rear differential gear ratios and what they mean for Subaru owners.
What is a Rear Differential?
The rear differential is a crucial component in a Subaru's drivetrain. It's responsible for transferring power from the transmission to the rear wheels, and it also allows the wheels to rotate at different speeds when the vehicle is turning. The gear ratio of the rear differential determines the relationship between the speed of the input shaft (from the transmission) and the speed of the output shafts (to the rear wheels).
Subaru Rear Differential Gear Ratios
Subaru rear differentials typically have a gear ratio between 4.11:1 and 4.44:1. The most common gear ratio for Subaru rear differentials is 4.11:1. This means that for every one revolution of the input shaft, the output shafts will rotate 4.11 times.
A higher gear ratio, such as 4.44:1, results in more torque being delivered to the rear wheels, which can be beneficial for off-road driving or towing heavy loads. However, a higher gear ratio also means the engine will be running at a higher RPM for a given vehicle speed, which can decrease fuel efficiency.
Factors Affecting Rear Differential Gear Ratio
The specific gear ratio used in a Subaru's rear differential can vary depending on several factors, including:
- Vehicle model and year
- Engine size and power output
- Intended use of the vehicle (e.g., performance, off-road, towing)
- Tire size
Subaru engineers carefully select the rear differential gear ratio to optimize the vehicle's performance and efficiency for its intended use.
Changing Rear Differential Gear Ratios
It is possible to change the gear ratio of a Subaru's rear differential, but this is generally only done by experienced mechanics or enthusiasts. Changing the gear ratio can improve acceleration, towing capacity, or off-road performance, but it may also affect fuel efficiency, top speed, and other aspects of the vehicle's handling and performance.
Before attempting to change the rear differential gear ratio, it's important to carefully consider the potential impacts and ensure the new ratio is compatible with the vehicle's other components.
How do you tell what ratio a diff is?
The axle may have a sticker, and on the differential cover, you might have a small metal tag that's sticking out that will have the gear ratio stamped on it.
What is the diff ratio of a Subaru Forester?
4.111 RATIO
SUBARU FORESTER DIFFERENTIAL CENTRE 2.5, EJ25, PETROL, AUTO T/M, 4.111 RATIO (B1.
Are Subaru differentials limited slip?
At the core of our legendary symmetrical-full-time AWD system is Subaru's centre limited-slip differential.
What is the differential ratio of the Subaru XV?
2013-2019 Subaru XV Crosstrek MT Rear Axle Differential Carrier 4.44 Ratio.
What is the rear diff ratio for a Subaru?
These gears are a multiplier only for the rear diff ratio. Subaru uses only 1.0 or 1.1 ratios for the transfer gears depending on the application. The 1.1 ratio has been used with certain applications using a 3.90 final drive ratio. With the 1.1 transfer ratio a 3.545 rear diff ratio is used (3.545 x 1.1 = 3.90).
Do Subarus have 2 differentials?
Which splits that torque 50/50. Front to rear. So it sends it to that front differential. And the rear. Differential. Up front you have an open diff in the rear. You also have an open diff.
How often to change Subaru rear differential fluid?
When Should Differential Fluid Be Changed? Fortunately, differential fluid doesn't need to be changed as often as the oil in your engine, but we do recommend that you get your differential fluid replaced every 15,000 miles or so.
What is the differential on a Subaru?
Your vehicle's differential system is a gearbox between the drive wheels that allows wheels to turn at independent speeds and assists your car in turning. All-wheel drive Subarus have both front and rear differentials. The fluid in the differential system breaks down over time and will eventually need to be replaced.
