How much transmission fluid does a Subaru Baja manual take?

The manual transmission in the Subaru Baja typically holds about 2.9 quarts of gear oil when drained and refilled, which is roughly 2.7–3.0 liters. Exact capacity can vary slightly by model year and the specific 5‑speed manual variant, so it’s best to confirm with the owner’s manual or the transmission code if possible.

In this article, we’ll outline the expected capacity, recommended fluid types, and a practical step-by-step guide for checking or replacing the transmission fluid in the Baja’s manual gearbox. We’ll also note common caveats and best practices to ensure a proper fill.

Capacity basics for the Baja manual transmission

Typical capacity range

For most Baja models equipped with a 5-speed manual, the full fill amount is commonly cited as about 2.8–3.0 quarts (approximately 2.7–2.9 liters). Variations can occur by year or transmission code, so use the manual’s spec or the vehicle’s service bulletin if you have access to it.

Knowing the approximate capacity helps you plan a drain-and-fill or a simple top-off. When performing a full change, plan on roughly the full capacity and verify the level at the fill plug after the refill process.

Service steps to replace or top off the manual transmission fluid

Below is a practical, step-by-step approach to draining and refilling the Baja’s manual transmission. The list assumes you’re working on a level surface with safe support for the vehicle.

• Park on level ground, engage the parking brake, and chock the wheels. Raise the vehicle if needed to access the transmission drain and fill plugs.


• If possible, loosen the fill plug first to ensure you can refill later; then place a drain pan beneath the transmission and remove the drain plug to let the old fluid flow out.


• Wait for the fluid to drain completely, then reinstall the drain plug with a new washer or gasket as required, torquing to the manufacturer’s specification.


• Locate the transmission fill plug on the side of the case, remove it, and gradually add new gear oil through the fill hole until fluid begins to seep out of the fill hole—indicating the proper level.


• Reinstall the fill plug, clean up any spills, and lower the vehicle. Start the engine and move the gear selector through the gears (with the car stationary and the parking brake engaged) to circulate the fluid.


• Let the transmission come to operating temperature, then recheck the level on level ground and top up if necessary to reach the fill hole level.

Concluding note: Following a drain-and-fill procedure with careful level checks helps ensure the manual transmission operates smoothly and lasts longer. If you’re only topping off, use incremental additions and recheck the level to avoid overfilling.

Fluid specifications and practical tips

Before selecting a fluid, keep in mind that Subarus with manual transmissions typically use a GL-4 or GL-5 gear oil with a viscosity around SAE 75W-90 (synthetic or conventional). Always verify the exact specification for your Baja’s year and transmission code in the owner’s manual or service manual, as recommendations can vary slightly by production period.

Important notes to guide your choice and procedure:

• Recommended fluid type: SAE 75W-90 gear oil meeting API GL-4 (preferred) or GL-5 specifications; synthetic formulations are common and typically fine.


• Fluid capacity reference: expect roughly 2.8–3.0 quarts (2.7–2.9 liters) for a full drain-and-fill, though use the exact spec for your vehicle if available.


• Do not use motor oil, automatic transmission fluid, or other non-gear-oil lubricants in the manual gearbox.

Bottom line: For a typical Subaru Baja manual transmission, plan on about three quarts of 75W-90 GL-4/GL-5 gear oil for a full drain and fill, and adjust based on your vehicle’s exact specifications and level checks.

Summary

The Subaru Baja’s 5-speed manual transmission generally requires around 2.8–3.0 quarts (2.7–2.9 liters) of gear oil for a full drain and refill. Use a 75W-90 gear oil that meets GL-4/GL-5 specifications, confirm exact capacity via your manual or service sheet, and follow careful fill-level practices to ensure optimal performance and longevity of the manual gearbox.

What kind of transmission fluid does a 2003 Subaru Baja take?

DEXRON-III Automatic Transmission Fluid
1 quart. DEXRON-III Automatic Transmission Fluid (ATF).

How much manual transmission fluid do I need?

You will need between 2 to 6 quarts (1.91.91.9 to 5.75.75.7 liters) of manual transmission fluid, but the exact amount depends on your specific vehicle's make, model, and year. The most accurate way to determine the exact quantity is to consult your owner's manual, which will provide the precise capacity for your car. 
This video demonstrates the process of changing manual transmission fluid: 59sClassic Car MaintenanceYouTube · Dec 13, 2024
How to find the exact amount

• Check your owner's manual: This is the most reliable source for your car's transmission fluid capacity. 
• Find the fill plug: Locate the fill plug on the side of the transmission case, often near the halfway point of the box. 
• Fill until the fluid reaches the fill plug: The correct amount of fluid is when it starts to flow out of the fill hole. You can test this with a finger or a clean rod to see when the fluid level is just at the bottom of the hole. 

Important considerations

• Overfilling can cause damage: Too much fluid can lead to foaming, which prohibits proper lubrication and cooling and can cause part pitting. 
• Underfilling can also cause damage: Insufficient fluid can lead to improper fluid pressure and potential overheating, so it's crucial to get the level right. 
• Work on a level surface: Make sure the car is on a level surface to get an accurate fluid level reading. 
• Add fluid slowly: If you are unsure of the total amount needed, add fluid in small increments (e.g., quarter-quarts or half-liters) and recheck the level until you reach the correct amount. 

You can watch this video to see how to fill manual transmission fluid until it starts coming out of the fill port: 1m2CarProsYouTube · Dec 11, 2021

What kind of oil does a Subaru manual transmission take?

Genuine Subaru Gear Oil Extra MT 75W-80 is uniquely formulated for Subaru manual transmissions.

How to check Subaru manual transmission fluid level?

So let me go ahead and pull that plug out take a look at that. As you can see there. We've got the uh. We got two little lines. There. So bottom line is a low level Top Line is a full level.