New Differential

My initial comment in this whole thing blamed nobody, it is a simple fact of what happened. First differential howled, I took it in to have it looked at. To make a long story short, Toyota determined it wasn't normal and replaced it. New differential started howling, Toyota looked at it and said it must be normal.

No blame, just the facts. If that is what Toyota determines to be normal, a howling that shows up over time and slowly gets louder and develops over a wider speed range, that's fine, they are free to design whatever they want. Luckily we have a choice of what to buy.

Since Toyota has made it clear to me what they are willing to do and it isnt my only issue with the truck, I'm trading the truck in soon and moving on. It is a pretty easy solution for me. I've posted plenty of facts about this situation, and others, without blaming anyone else. Regardless of brand, I think it is pretty fair to expect a problem free new vehicle and if there are issues, which there are in any production environment, then expect that the manufacturer will acknowledge them and fix them.

If they cant or wont do that, I'm happy to take $30k elsewhere.

 

, this dude? posted this video claiming rear end howling but in reality its driveline noise,road noise,tires, air turbulation,exhaust. whats it supposed to be a hovercraft and not pick up all these variables when driving and then claim a shitty design?

 

you must be the most unluckiest 3rd gen owner on the planet cause they are selling better than any other mid sized pickup in the USA and the majority of the owners love them, good luck with the sale, let us know what you get next I would be interested to know how well your new vehicle stacks up to the Tacoma

 

Good lord. I think you are trolling now. After all this, you don't even own a 3rd gen.

It's simple. Jump in another new vehicle and drive it. The noise isn't there. My old ford truck. No howling (until the pinion bearing failed). New GMC Sierra...no howling. Plenty of vehicles...no howling.

Road noise, tire noise, air turbulation.....throttle controlled air turbulation. Beautiful.

 

you calling it howling but in your YOUTUBE video its a lot of normal noise you will pick up driving, my 1995 has that, my 2004 Tacoma had that this is nothing new I can hear even more by opening up the rear slider window, you've fallen for the biggest trick in the 3rd GEN haters manual>>make them hate their trucks by constantly rehashing problems that do not exist instead of enjoying your truck or getting rid of it.

 

My 2017 TRD off road makes a humming noise around 35-45 mph after starting up but stops after the engine warms up. I can't say mine is howling since it does t whine the whole time I'm in the truck.

Otherwise, it doesn't bother me much to the point I want to trade in a practically brand new truck. No way I'm going to eat $4-5k on a purchase just because of a minor humming noise but a lot of folks are experiencing this howl and if they aren't happy with the truck they need to sell it and move on. Don't complain about taking a loss selling it. Wait for Toyota to come up with a fix for the howl.

This is my first Tacoma and first pickup truck so maybe my expectations are different on how the vehicle is suppose to sound.

 

I'm not talking about the road noise or my muffler or my ass moving on the seat, I'm talking about the "woooooooo" howling. You don't hear it?

And again, problem doesn't exist, that is why the master tech at the dealership said "wtf that's not normal" and replaced it. The experts made the conclusion, not me.

 

yes but you have stated after 10 miles of ownership a howling commenced and it didn't happen during the test drive and you had a new diif replace it and after 20-30 miles it howled too, so that will tell you it is normal for the truck cause had 2 of the same diffs in the truck and both howl as you say in reality its driveline noise,tires,air,exhaust noise not a differential design that in your aerospace experience sucks or has any record of failures due to the noise.

 

the wooing is the axle turning when feathering the throttle, my 2 Toyotas did the same thing, not a differential that's flawed

 

@aero90 You've defended your position admirably. In the case of this discussion, you won't win. He's just looking to argue.

 

.....why is Toyota replacing differentials...why are service departments going "wtf is that noise" when they've been servicing Tacomas every day for I don't know how long. Better yet, why isn't it happening on every single Tacoma?

Toyota didn't revolutionize the differential or axle setup, the technology has been around forever. I don't hear it on other trucks/cars and I definitely didn't have it on my 2002 Ford truck that I drove for 14 years.

But back to my original point, in the end they are free to make it as noisy as they want, but I'm confident I can get a different vehicle that doesn't howl.

If you're ok with it, that's fine, keep enjoying your truck. Others aren't ok with it and just because you look past it doesn't mean it doesn't exist and the noise is imaginary.

 

Yeah you're right, I really fell into the hole here.

OP, I hope cookiemonster and I answered all the questions you didn't have.

 

bottom line is Toyota engineers removed and tested the rear diff and deemed it operating normally after many complaints of howling I believe that the rear is operating as designed and will cause no harm to the truck, if the noises you are hearing offend you then you should get a new truck.

 

Can this be restated with proper grammar and punctuation--I think I follow the gist of the comment but the exact logic is eluding me. Toyota's recall explicitly links "catastrophic" rear-end failures to the fact that they (Toyota) seemed to be so incompetent as to not properly torque fasteners and/or not fill the rear-ends with an appropriate amount of gear oil¹.

Also I still don't get how someone--anyone--could possibly drive a dry rear-end to the point of a devastating lock-up without thinking "Gee something doesn't sound right?". I understand that many Americans are as dumb as a post (watch any Watters' World video if you doubt this)--but for crying-out-loud, the rear-end was screaming like a banshee before it locked up and caused the truck to go off road...

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¹ - To me this is inexcusable shìt. How could a company that has been making solid rear axles as long as Toyota (I had an '85 Corolla RWD) in any conceivable way screw up to this extent?

 

good points,

 

Thank you!

 

Some people maybe hearing air turbulence harmonics (OR does not come with air dam) under the vehicle or tire noise from the G/Y that come standard with the truck.

Also some have replaced diffs with the problem still there only to go away after tire replacement.
Moreover, some ppl are more\less sensitive in hearing certain sounds around them.

I would try some dynamat under seats, doors and rear seat wall areas after it's been verified or noted by dealer that the diff is ok and not falling apart.

The Toyota rear diff is solid and as good if not better than most, always has been

Edit: Also worthy of note, Toyota went with a slightly lighter visc diff oil for this year 75W85 than the previous 75W90 recommendation. I replaced mine with at 5k with Mobil1 75W90 Synthetic at 5k no issues, but I never had any noise of any kind, its just my preference and I'm by no means advising or suggesting anyone to do as I did.

Cheers!

 

I do not recall seeing anyone with a diff issue on here have it magically disappear after changing tires, you can see videos on YouTube where they run the truck and isolated the noise to the rear diff. Toyota is aware of the problem and is supposed to be working on a fix, if it were just tires it would be a helluva lot cheaper for them to throw those on versus swapping out all these diffs.

 

I think you guys got the upgraded exhaust with whistle tips

https://youtu.be/eSOSJ68xOBA

It's that's Woooooo wooooo

 

It's not just the tires that could make noise, there's turbulence and other factors under there too and auto makers don't warranty perfectly working tires and neither do tire makers unless they're failing so that's a mute point.
But all tires do make noise and depending on tire wear and air pressure, it can very also even from lot to lot.
I wouldn't wait for a fix to come for something that's not broken and I'm certain that if a certain person with a hard-on for Toyota hadn't made such a suggestive post, no one would be complaining about it.

It's all just a placebo effect, nothing here to see, all is well
Cheers!