Differential crapped, 11,000K!

2021 bought new. Was hearing a whining from drivetrain getting worse over time and dealer confirmed, black burnt oil with metal glitter! 100% under warranty wheel to wheel replacement but jeesh, less than 2 yrs old?

 

Did it actually lock up? Did you get pics?
Most have some harmonic whine that is often attributed to “differential whine” and the rear is replaced under the dealer’s “F it, I don’t know swap-a-part program”

 

Wow tough misfortune there, glad they’re replacing it, and wheel to wheel!

 

Rare that early but mechanical parts fail

 

11,000,000 is a lot of miles!

 

Came here to say this!!!

 

SMART ASS!

 

Some metal on the diff drain plug magnet during the first service has been reported on here a number of times. It could be normal and nothing to worry about.

I had a Subaru that lost all the oil in the front diff and howled very loudly. After it was refilled, it ran for 10’s of thousands of miles with a very slight whine until the rear driveshaft went out and took the tranny with it at about 200k miles.

 

What he said lol. No pics, dealer called, no questions,, replaced it, no more whine,all good to me. Just a head scratcher, must have been bad from factory.

 

If a diff fails, it usually fails early or after many many tens of thousands of miles and poor or no maintenance. Be glad it was early enough to have it replaced on Toyota's dime.

 

I had my 2nd Gen transfer case fail at 15k miles for no reason..and you know how awesome 2nd gens are . It happens.

 

Out of curiosity, did they inspect the inside of the old diff? I think that’s the best (only?) way to know if something failed. The differential is an assembly of parts. Simply saying the diff failed doesn’t narrow things down to which part or parts failed and why.

I’m not a differential expert, but I know that they require special attention to detail when they are assembled. A mishap during assembly might have caused a premature failure. A manufacturing defect in one of the parts may have too.

 

Or perhaps just like Tacoma World, manufactured on a Friday.

 

Same story, different day. Your diff was likely just fine. Enjoy the new one.

 

That's the first thing i noticed as well hahahaha

 

Assuming he bought the truck mid 2020, to get to 11 million miles would require driving the truck non-stop at an average speed of over 400 mph! No wonder the differential went out.

 

They are known for their reliability,,, despite what the shit-posters say.

 

It was set up poorly. You should be good for the life of the truck.

 

That sucks, at least it’s under warranty. If not I’d be doing a gear swap if it was mine.