Car Problem Reports

Cadillac STS Rear Axle Pinion Seal May Leak

Cadillac STS Problem
10 Reports
Me Too

Model Years Affected: 2005, 2006, 2007, 2008, 2009

Average Mileage: 74,001 mi (21,000 mi - 144,000 mi)


The rear axle pinion seal may leak causing fluid loss and possible internal rear end damage. Replacing the faulty seal will commonly correct this concern.

  • just brought car , only put @ 100 miles on it and found little drop of oil on garage floor it came from rear axle its at dealership now didnt have chance to purchase extended warranty hopiing they will fix it

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  • Visitor, , 21,000 mi

    Bought this car used with 18000 miles on it, and the rear pinion seal let go shortly after that. The selling dealer replaced it, and so far, at 27000 it is still OK. However, the rear end hums between 35 and 50 mph.

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