Originally Posted by jameskennedy95
Well I am bringing it to another shop anyway because I need to get the rear main seal replaced so I'm going to have this mechanic listen to it and see what he says but I wanted to give him something because I have no clue it's 35mph plus, it sounds like a shopping bag catching wind but I looked under the whole jeep, nothing when I first heard it I thought my tire was loosing air
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Before you replace the rear main seal, run your hand along the back of the engine.
The valve cover on the I-6 tends to leak, where the oil runs down the back of the engine and mimics a leaking rear seal to a mechanic not familiar with the crappy valve cover sealing.
If you need to replace the valve cover,I'd spend the money on the Hesco aluminum one and formagasket the heck out of it. If the standard plastic one, don't try to tighten it, tends to make it worse.
The rear seals DO leak, the replacement ones seem to work a lot better. My factory one leaked at about 45K, the [stock dealer] replacement was dry at near 200K.