Castrol TRANSMAX Axle EPX 85W-140 - 5 Litre
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Full details
This guide is for automotive and commercial vehicle owners and technicians who require a high-performance gear oil. The Castrol TRANSMAX Axle EPX 85W-140 offers superior wear protection and extended component life, especially under heavy load conditions. A key consideration is ensuring your vehicle specifically requires a GL-5 85W-140 specification before use.
All features
| Model Part Number | 15F1A2 |
|---|---|
| Brand | Castrol |
Extended Product Information
FAQs
What does API GL-5 mean?
API GL-5 is a performance classification for gear oils, indicating suitability for automotive hypoid gears operating under high-speed, low-torque, and low-speed, high-torque conditions. It provides extreme pressure (EP) protection.
Can I use this oil in my manual transmission?
Yes, if your vehicle's manual transmission specifically calls for an API GL-5 85W-140 specification. Always check your owner's manual for the correct lubricant type.
What is the difference between GL-4 and GL-5 oils?
GL-5 oils contain higher levels of extreme pressure additives, making them more suitable for hypoid gears found in differentials. GL-4 oils are generally recommended for manual transmissions and transaxles where these higher additive levels might be corrosive to softer metals like brass or bronze.
How often should I change the gear oil?
The service interval varies by vehicle manufacturer. Consult your owner's manual for the recommended change frequency, which often depends on driving conditions (e.g., normal vs. severe service).
Is Castrol TRANSMAX Axle EPX 85W-140 a synthetic oil?
No, this is a premium mineral-based gear oil. While effective, it is distinct from fully synthetic formulations which may offer performance benefits in more extreme temperature ranges.
What are the benefits of an 85W-140 viscosity grade?
The '85W' indicates good low-temperature fluidity for easier starts, while the '140' provides a thick, protective oil film at high operating temperatures, crucial for heavy-duty applications.
Troubleshooting
Gear noise or whining
Verify the correct oil specification (API GL-5 85W-140) is used. Old or degraded oil can also cause noise; consider a fluid change if overdue.
Difficulty shifting gears
Ensure the gearbox is filled to the correct level. If the issue persists, it may indicate internal wear or a clutch problem, not necessarily the lubricant.
Oil leaks from seals
Check that the oil has not been overfilled. Leaks can also be due to aged or brittle seals, which may require replacement.
Excessive heat from differential
Confirm the oil level is correct and that the differential breather is not blocked. Heavy load or high-speed operation can naturally increase temperatures, but prolonged extreme heat may indicate other issues.
Pros and Cons
Pros
- Excellent protection against gear wear, even under heavy loads.
- Suitable for a wide range of driveline components.
- Ensures smooth operation across varying temperatures.
- Meets recognized industry and OEM standards.
- Extends the service life of critical transmission parts.
Cons
- Requires specific GL-5 85W-140 specification; not universally applicable.
- As a mineral-based oil, may not offer the same advanced performance as synthetic alternatives in extreme conditions.
- A 5-litre container may be more than needed for some smaller applications.
Setup, Compatibility & Care
Compatibility: This oil is specifically designed for applications requiring an API GL-5 85W-140 lubricant. Always consult your vehicle's owner's manual or the component manufacturer's specifications to confirm compatibility before use. It is suitable for differentials, manual gearboxes, and steering gears. Do not use in applications where a GL-4 or other specification is recommended, as this could lead to component damage.
Filling Procedure: Ensure the vehicle is on a level surface. Use appropriate tools to drain the old lubricant and fill with the new Castrol TRANSMAX Axle EPX 85W-140. Fill to the manufacturer's specified level, typically indicated by the fill plug hole. Overfilling can lead to seal damage and performance issues.
Care and Maintenance: Regular inspection of the differential and gearbox breathers for blockages is recommended. Change the oil according to the vehicle manufacturer's service schedule. Given its 5-litre volume, it's ideal for vehicles requiring larger capacities or for shops that service multiple vehicles. Store the oil in a clean, dry place, away from direct sunlight and extreme temperatures, with the container tightly sealed.