smell gear oil burning???

[Stealthb4]

Im new to toyotas and trucks. and I am getting a natural gas type smell when im driving. Only with my window down and after the truck warms up....
can anyone help me solve this???

[RedRunnertc]

Natural gas type smell?

Both gear oil and a bad cat give a rotten eggs type smell from the sulfur...

My first suggestion would be to slide under the truck and look for exhaust leaks.

[Stealthb4]

no it is more like the smell of natural gas from like your stove....
i dont think its the cat