🚗 Classic Fault — Ford (1982–1993)
Sierra rear axle oil seal leak
💰 Estimated Repair Cost
$25 – $80 GBP
Parts and labour estimate
🔧 Tools Required
Axle puller, seal driver
📋 Overview
The semi-floating rear axle oil seals weep differential oil onto the rear brake drums. Very common on high-mileage Sierras.
🩺 Symptoms
- Oil on rear drums
- brake fade or grabbing at rear
- differential oil level dropping
- visible oil on inside of rear wheels
🔍 Possible Causes
- Worn axle shaft oil seals
- worn axle bearing (causes seal wear)
- overfilled differential
🛠️ Diagnosis Steps
Remove rear drums and inspect — oil contamination visible on shoes and drum inner face
✅ Most Confirmed Fix
Axle seal and bearing replacement
83% of users confirm this fix worked (21 reports)
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