Rear Main Seal

The rear main seal—or rear crankshaft seal—is the working seal against the rotating crankshaft where it exits the rear of the engine.

Symptoms of Wear or Failure

  • When a rear main seal leaks, engine oil will often be found dripping from between the engine and the transmission
  • Clutch (if equipped) may slip or grab

Related Repair Advice

  • Replacement of the rear main seal often requires removal of the transmission. Due to this labor intensive job, shops will often suggest having the rear main seal replaced anytime the transmission is removed.