Symptoms
Oil on the propshaft flange and axle casing near the nose of the differential. Dropping axle oil level.
Likely cause
Worn pinion seal, often with a grooved flange or blocked axle breather building pressure.
Suggested fixes
Listed roughly in the order most owners try them.
- 1
Replace the pinion seal and flange
Mark the pinion nut position, replace the seal and flange, then retighten to preserve bearing preload.
- Difficulty:
- Moderate DIY
- Cost:
- £ (Under about £50 in parts)
- 2
Clear or extend the axle breather
A blocked breather pressurises the axle. Clean it, or fit a raised breather kit for wading.
- Difficulty:
- Easy 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.
Related faults
- Axles & drivelineHigh severity
Snapped rear half-shaft
Loud bang followed by no drive to the rear (in high range with diff lock off), or the vehicle moves only with front drive engaged.
Series II / IIA · Series III · 90 / 110 / 1273 fixes - Axles & drivelineMedium severity
Clunk on take-up from worn drive flange splines
A clunk when pulling away or changing between drive and overrun. Excessive rotational play at the wheel hub drive flange.
90 / 110 / 127 · Defender2 fixes - Axles & drivelineMedium severity
Differential whine or clunk
Whining from the axle that changes between drive and overrun, clunk when turning, or metallic noise.
Series I · Series II / IIA · Series III · 90 / 110 / 127 · Defender3 fixes - Axles & drivelineMedium severity
Oil leaking from the front swivel housings
Oily film or drips on the chrome swivel balls and inside of the front wheels, low oil level in the swivel housing, possible oil on brake shoes or discs.
Series I · Series II / IIA · Series III · 90 / 110 / 127 · Defender4 fixes