If oil isn’t dripping from beneath your Jeep TJ’s inline-six, it’s because it’s either brand new or the rear main seal has been replaced within the last 40,000 miles. That’s just a fact ...

Rear Main Seal The rear main seal keeps oil sealed inside the rear of the engine, where the crankshaft connects with the transmission. It can be expensive to repair, often $600 or more, because it ...

This can also be the case if your rear main seal has been compromised. At the same time, though, car maintenance can be a tricky matter, and it's rarely plain and simple like this.