JDM Subaru TR580 CVT with 3.90 Final Drive, #959599

When you replace a CVT on an all-wheel-drive Subaru, the final drive ratio matters as much as the code. This JDM Subaru TR580 CVT takes the guesswork out of it. It’s a TR580DHABA, serial 959599, with a confirmed 3.90 final drive. As a result, owners with a 3.90 rear differential can buy with confidence.

Why the 3.90 Ratio Is So Important

Subaru’s AWD system links the front and rear wheels through the center coupling. Therefore, the front final drive in the CVT must match the rear differential exactly. If the ratios differ, the drivetrain binds, which can quickly damage the transmission and rear diff. So, before ordering, check that your car uses a 3.90 ratio. The tag on your old CVT or rear differential shows it, or you can send us your VIN.

Where This CVT Comes From

Subaru used the TR580DHABA in Japanese-market Impreza, XV and Forester models with the non-turbo FB engines. In addition, many US Impreza and Crosstrek models from the same era use TR580 CVTs with a 3.90 ratio. However, Subaru built several TR580 versions, so please match both the code and the ratio, or confirm with your VIN.

Fitment

• JDM Subaru Impreza, XV and Forester (non-turbo, CVT, AWD)
• US Impreza and Crosstrek: match the code and 3.90 final drive, or confirm with your VIN
• Not for manual cars, turbo models or older EJ-engine Subarus

For background, see the Subaru XV / Crosstrek overview.

Why Buy JDM?

JDM transmissions often come from lower-mileage cars, since Japan’s strict shaken inspection rules push many owners to retire their cars early. Moreover, a used JDM CVT costs far less than a new or rebuilt one.

Installation Notes

1. Fill only with genuine Subaru CVT fluid, to the correct level.
2. Flush the cooler lines if your old CVT failed internally.
3. Run the CVT learning procedure with a Subaru-capable scan tool.
4. Road test the car and check for codes.

Professional Installation Available

Want it done right the first time? J-Spec Auto Sports installs the engines, transmissions and parts we sell at our shop in Henrico, Virginia, near Richmond. We’ll install the CVT, complete the learning procedure and road test your Subaru. To get a quote or book a time, schedule an appointment or call 866-683-3747.

Shipping

We drain this CVT, cap it and strap it to a pallet, then ship it by freight anywhere in the continental US. Local customers can also pick it up at our Henrico shop.

FAQ

What’s the final drive?
3.90.

Will this fit my Crosstrek?
Many US Crosstreks use a 3.90 TR580. Match the code and ratio, or send us your VIN to confirm.

What happens if the ratio doesn’t match?
The AWD system binds, which can damage the CVT and rear differential. Always match the ratio.

Does it need programming?
Yes. Run the CVT learning procedure with a Subaru-capable scan tool.

What’s the serial number?
959599. It’s shown in the photos.

Can you install it?
Yes, at our Henrico, VA shop. Call 866-683-3747.