Why is my Land Rover Defender leaking transmission fluid near the gearbox?

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Why is my Land Rover Defender leaking transmission fluid near the gearbox?

I own a Land Rover Defender in Pakistan, and I recently noticed a red/brown fluid leaking near the gearbox. What are the most common causes of transmission fluid leaks in Defenders, and how can I identify whether it’s a minor seal issue o r something more serious? Are there specific parts that tend to fail in local conditions?

Talha Kyanii asked on 11 Dec 2025 16:55:03 pm

1 Answer

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Gari Master - on 11 Dec 2025 16:56:16 pm

Transmission fluid leaks near the gearbox are often caused by worn o r damaged seals and gaskets. In Defenders, the most common culprits are:

Output shaft seal: This can wear over time and start leaking, especially in older models.

Input shaft seal: Less common but still possible.

Transmission pan gasket: If the gasket is worn o r improperly installed, fluid can seep out.

Loose bolts o r damaged pan: Road vibrations can loosen bolts, causing leaks.

In Pakistan, heat and rough roads accelerate wear. To identify the source:

Clean the gearbox thoroughly and inspect for fresh leaks.

Check fluid levels low levels can indicate a serious leak.

Look for red/brown fluid pooling under the vehicle.

If the leak is minor, replacing the gasket o r seal usually resolves it. For major leaks o r internal damage, a professional inspection is necessary.