LR
All faults
Gearbox & transferMedium severity

Transfer box oil leaks and diff lock warning light stays on

Will get worse if left.

Symptoms

Oil dripping from the transfer box, the diff lock warning light stays on after disengaging, or high and low range is hard to select.

Likely cause

Worn output seals, a faulty diff lock switch, a seized diff lock mechanism or a poorly adjusted gear linkage.

Suggested fixes

Listed roughly in the order most owners try them.

  1. 1

    Replace transfer output seals

    Front and rear output seals leak with age. Replace and check the flange surface.

    Difficulty:
    Moderate DIY
    Cost:
    £ (Under about £50 in parts)
  2. 2

    Replace the diff lock switch

    If the light stays on with diff lock out, the switch on the transfer box is often faulty.

    Difficulty:
    Easy DIY
    Cost:
    £ (Under about £50 in parts)
  3. 3

    Free off the diff lock and range linkage

    Clean and lubricate the linkage and adjust per the workshop manual. Engage diff lock regularly to stop it seizing.

    Difficulty:
    Moderate DIY
    Cost:
    £ (Under about £50 in parts)

This is general guidance gathered from owner experience and workshop practice, not a substitute for a workshop manual or a qualified mechanic. Costs are rough parts-only guides. Brakes, steering and suspension work affects safety, so if in doubt have it checked professionally.

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