sulfur odor

Gear oils are heavy in sulphur, likely just a bit spilled when they were topping everything off. If the odor is still strong a week later I would be trying to pinpoint it, might be leaking somewhere.

 

You sure it's not a bad battery?

 

Sulphur smell is usually the batteries. Gear oil smells like burning oil with a different smell then actual oil.

Under the drivers door. Where you fill the DEF tank. Is a black lid. Pop that up and you'll see 4 batteries. Since they're located under the cab. It's natural for the smell to drift to the front. But the strongest point of smell will be right under the drivers door.

I had the same problem in a 12 FL. Took me 4 weeks of complaining. To the point where i started requiring jump starts before the mechanic finally got off his A and replaced em.

 

Just because you can still start the truck don't mean the batteries AREN'T going bad. YOu have 4 batteries and it only takes 1 to start the truck. Strong sulfur that dies off means a battery is overcharging and as the voltage trickles down, so does the smell. That's exactly what happened in my case. Give it time.

I'm willing to bet that if you were to use your batteries for normal usage on your 10. There wouldn't be anything left to start the truck. Or the shutdown shut's down within 2 hours or more.

 

Placing my bets on a bad battery as well.

 

Because Alternator.

 

Bet you if you opened the battery box you'd see evidence of a battery gassing. If you ran it, you'd probably see the gas venting.

 

If that trucks a 2016 and the batteries are bad, you may still be in basic, a ride to a freightliner may get you some free batteries if the truck needs them.