The rumble is a lot deeper and louder, even when idling. The truck still drives fine though
My car has 271633 miles.
My car has a manual transmission.
If you had a new car I would say the lights on the front but you are dealing with an older truck. There are a few issues that could happen with your exhaust. If it isn't backfiring it is not your exhaust manifold. If you can't find any holes in the exhaust pipe then I would rule it as your catalytic converter. With you saying your truck smells I would check both the catalytic converter and the exhaust manifold to ensure you get the correct issue fixed.
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