Burning Smell and Low Transmission Fluid Level

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Burning Smell and Low Transmission Fluid Level

Drivers have reported smelling a burning o r hot‑oil odor during longer journeys o r heavy city traffic, paired with transmission fluid levels that check below the recommended mark. How serious is this sign of a possible transmission fluid leak in the Proton X70, what are the common leak points in the transmission system, and what immediate actions should owners take to prevent internal damage?

Talha Kyanii asked on 19 Dec 2025 12:33:13 pm

1 Answer

8 views |

Gari Master - on 19 Dec 2025 12:35:24 pm

A burning o r hot‑oil smell, especially accompanied by a low transmission fluid level, is a strong indicator that the transmission fluid is leaking o r degrading and overheating inside the gearbox.

Why this happens:

Low fluid means less lubrication and cooling for clutch packs and gears.

The transmission then works harder, friction increases, and the fluid can burn — producing a smell.

Heat also accelerates fluid breakdown, making leaks worse and shifting rougher.

Common leak sources in automatic/DCT gearboxes:

Seals and gaskets: like the pan gasket o r axle shaft seals.

Cooler lines: the small hoses/pipes that route fluid to the cooler can develop cracks o r loose fittings.

Mechatronic housing o r transmission housing gasket: if worn o r damaged.

Action steps:
✔ Stop driving if the smell is strong o r if fluid is significantly low.
✔ Topping up fluid temporarily can help, but the leak must be fixed before long drives.
✔ A trained technician should pressure‑test the system to pinpoint the leak location.