NEW TSB, Whine Noise From Rear of Vehicle

pjensen641 · Feb 15, 2018

skiploder said: ↑

200+ pages is a lot to go through for people stumbling into this thread. For the sake of clarifying what my truck had and what the tear down revealed, I'll recap it here.

My 2017 OR AC had the howl. After I trained my ear to hear it, I could pick it up quite easily as well as pick it up in other people's trucks. I opened a case with corporate and had my truck checked out by the local dealership. I was told at the dealership that they had replaced a few third members in both second and third gens and the sound always came back. They were the ones that pointed me to the TSB that covered the issue for the entirety of the second gen run.

We have a company mechanic and I have a mechanic for my personal diesel. I had both of them listen to the howl and to my surprise, they both opined that it was "just a noise". That "all rear ends make noise" its just to what degree we can hear them or to what degree the manufacturer muffles them out.

While I took some comfort in this, I was still concerned. Around the same period hiPSI and I exchanged PMs in which he pretty much postulated what both my mechanics said.

We do a lot of crawling (for various reasons) in our Tacoma and with the suspension and wheel/tire mods, decided to go with the 4.88 gears. We are lucky that a fairly nationally renowned rear end shop is about an hour away. We selected our setup and made an appointment to bring the truck in.

I have withheld the name of the shop at the request of the manager. Apparently someone else on a forum named them and they were inundated with calls regarding the howl.

Anyway, I did a ride along with the foreman and he immediately heard the howl. To my surprise he shrugged it off and began stating all the vehicles manufacturers and models with noisy rear end setups. The bottom line was this, the nature of the noise was not indicative of anything other than what he referred to as a NVH issue. I asked them to do a tear down of the old gears as part of the work. They charged me a nominal fee. I left the truck there for two days and returned.

The manager had the old set neatly laid out on an old canvas tarp in one of the storage bays. He proceeded to walk me through the condition of the gears, what they looked for as they were removing them and gave me a fairly detailed outline of what we should have seen at this mileage if there was an issue.

There was nothing of note. Everything was fine. The noise, he said, was due to the nature of the gears, the set up and the NVH characteristics of the truck. Calimed that he's had quite a few tacoma owners come in over the years worried about similar noises, but that the hino rear ends were fairly stout. He said that there was nothing in the setup or the condition of the old set that would have indicated a problem that needed to be addressed. He asked me if I had noted an increase or decrease in the noise depending on the number of passengers, there load in the back, the gear I was in etc. I told him I had not gotten down to that level of scrutiny. He also informed me that the V8 4runners and Lexus GXs were infamous for having a similar resonance that was addressed through a TSB.

Here's the bottom line. I've heard a lot of theories on what this may or may not be. For awhile I was seriously convinced my truck had a problem. After talking to some people who wrench for a living, my fears abated a bit. After talking to someone who sets up rear ends for a living over a wide variety of vehicles and having been taken through a teardown, I would have had no issues keeping the old gears in the truck and not spending another minute worrying about it.

As a hobby, I breed several species of snakes and dwarf varanids....some venomous some not. I've been in that hobby for over 40 years. I have mentored other venomous handlers at both zoos and at veterinary schools. I have consulted with the setup of certain species at zoos and museums. I do lectures and have been cited in scientific literature. While I do not consider myself an expert at anything, I have sent a lot of time working with several specialized species and have a fairly accurate ability to work with the animals both in regards to behavioral issues and in regards to their overall captive well being.

I am also a member of several snake forums. Not a day goes by where someone who claims to be an expert in the field spouts off about something I patently know to be bullshit. I have seen people given advice that probably caused them countless worry or that probably resulted in potential harm to the individual or the animal.

I am well aware that forums in general have given rise to a new breed of experts who have received their knowledge form "Google". They are experts only in parroting what they read on other forums or in various online articles.

nDub, this is not directed at you, but in general this thread has been littered with the opinions of people who arrived at their "knowledge" in a similar manner. While I personally think there may be several things going on with these rear ends, the non-intrusive howl at certain speeds is a resonance issue. Those with noises that are completely invasive and spread over a wider range may have something else going on....but for what I experienced, I can positively attest to the fact that there were no issues with my rear end other than resonance.
Click to expand...

Awesome post, thank you. I'd sticky it if I had magical mod powers. Only thing better would have been pics....not that I don't believe you.

skiploder · Feb 16, 2018

Male rhamphiophis rubropunctatus. Rear fang venomous. Most of the marks on the door glass are from him scent marking. Pics taken yesterday to prove to some idiot that they are not solely terrestrial. Idiot in question has probably only seen pictures of one and read that they will not climb.

Apologies if you were looking for pics of the tear down instead......

EdgeCrusher · Feb 16, 2018

skiploder said: ↑

200+ pages is a lot to go through for people stumbling into this thread. For the sake of clarifying what my truck had and what the tear down revealed, I'll recap it here.

My 2017 OR AC had the howl. After I trained my ear to hear it, I could pick it up quite easily as well as pick it up in other people's trucks. I opened a case with corporate and had my truck checked out by the local dealership. I was told at the dealership that they had replaced a few third members in both second and third gens and the sound always came back. They were the ones that pointed me to the TSB that covered the issue for the entirety of the second gen run.

We have a company mechanic and I have a mechanic for my personal diesel. I had both of them listen to the howl and to my surprise, they both opined that it was "just a noise". That "all rear ends make noise" its just to what degree we can hear them or to what degree the manufacturer muffles them out.

While I took some comfort in this, I was still concerned. Around the same period hiPSI and I exchanged PMs in which he pretty much postulated what both my mechanics said.

We do a lot of crawling (for various reasons) in our Tacoma and with the suspension and wheel/tire mods, decided to go with the 4.88 gears. We are lucky that a fairly nationally renowned rear end shop is about an hour away. We selected our setup and made an appointment to bring the truck in.

I have withheld the name of the shop at the request of the manager. Apparently someone else on a forum named them and they were inundated with calls regarding the howl.

Anyway, I did a ride along with the foreman and he immediately heard the howl. To my surprise he shrugged it off and began stating all the vehicles manufacturers and models with noisy rear end setups. The bottom line was this, the nature of the noise was not indicative of anything other than what he referred to as a NVH issue. I asked them to do a tear down of the old gears as part of the work. They charged me a nominal fee. I left the truck there for two days and returned.

The manager had the old set neatly laid out on an old canvas tarp in one of the storage bays. He proceeded to walk me through the condition of the gears, what they looked for as they were removing them and gave me a fairly detailed outline of what we should have seen at this mileage if there was an issue.

There was nothing of note. Everything was fine. The noise, he said, was due to the nature of the gears, the set up and the NVH characteristics of the truck. Calimed that he's had quite a few tacoma owners come in over the years worried about similar noises, but that the hino rear ends were fairly stout. He said that there was nothing in the setup or the condition of the old set that would have indicated a problem that needed to be addressed. He asked me if I had noted an increase or decrease in the noise depending on the number of passengers, there load in the back, the gear I was in etc. I told him I had not gotten down to that level of scrutiny. He also informed me that the V8 4runners and Lexus GXs were infamous for having a similar resonance that was addressed through a TSB.

Here's the bottom line. I've heard a lot of theories on what this may or may not be. For awhile I was seriously convinced my truck had a problem. After talking to some people who wrench for a living, my fears abated a bit. After talking to someone who sets up rear ends for a living over a wide variety of vehicles and having been taken through a teardown, I would have had no issues keeping the old gears in the truck and not spending another minute worrying about it.

As a hobby, I breed several species of snakes and dwarf varanids....some venomous some not. I've been in that hobby for over 40 years. I have mentored other venomous handlers at both zoos and at veterinary schools. I have consulted with the setup of certain species at zoos and museums. I do lectures and have been cited in scientific literature. While I do not consider myself an expert at anything, I have sent a lot of time working with several specialized species and have a fairly accurate ability to work with the animals both in regards to behavioral issues and in regards to their overall captive well being.

I am also a member of several snake forums. Not a day goes by where someone who claims to be an expert in the field spouts off about something I patently know to be bullshit. I have seen people given advice that probably caused them countless worry or that probably resulted in potential harm to the individual or the animal.

I am well aware that forums in general have given rise to a new breed of experts who have received their knowledge form "Google". They are experts only in parroting what they read on other forums or in various online articles.

nDub, this is not directed at you, but in general this thread has been littered with the opinions of people who arrived at their "knowledge" in a similar manner. While I personally think there may be several things going on with these rear ends, the non-intrusive howl at certain speeds is a resonance issue. Those with noises that are completely invasive and spread over a wider range may have something else going on....but for what I experienced, I can positively attest to the fact that there were no issues with my rear end other than resonance.
Click to expand...

Cross-post this to the 3gen poll 210+ page thread. Great info

Lt. Dangle · Feb 16, 2018

EdgeCrusher said: ↑

Cross-post this to the 3gen poll 210+ page thread. Great info
Click to expand...

It's there already in a similar form. Instead of people listening to it, you get certain posters crying and whining about their theories and "symptoms" burying it. Then people can't find it.

taco woodeye · Feb 16, 2018

TY @skiploder. The teardown and the comments from real experts--that's the money shots !

FWIW.
The vehicle in my signature.
Date of manufacture 11/17 at San Antonio.
Date of purchase 12/30/17.
I get the sound at ~60 mph.
I am a delivery driver subcontractor.
The factory rear axle fluid will be changed out this weekend
for Red Line GL5 75W-85 this weekend at 11k vehicle miles.
~3.1 quarts.
I will report the results.
What say the Amsoil

$29 75W-90 Synthetic Gear Lube - 1 Quart (Pack of 2)

75W-90 crowd ?
Is viscosity an issue ?

EdgeCrusher · Feb 16, 2018

taco woodeye said: ↑

TY @skiploder. The teardown and the comments from real experts--that's the money shots !

FWIW.
The vehicle in my signature.
Date of manufacture 11/17 at San Antonio.
Date of purchase 12/30/17.
I get the sound at ~60 mph.
I am a delivery driver subcontractor.
The factory rear axle fluid will be changed out this weekend
for Red Line GL5 75W-85 this weekend at 11k vehicle miles.
~3.1 quarts.
I will report the results.
What say the Amsoil

$29 75W-90 Synthetic Gear Lube - 1 Quart (Pack of 2)

75W-90 crowd ?
Is viscosity an issue ?
Click to expand...

Won't make a difference as far as the sound goes.

hiPSI · Feb 16, 2018

taco woodeye said: ↑

TY @skiploder. The teardown and the comments from real experts--that's the money shots !

The factory rear axle fluid will be changed out this weekend
for Red Line GL5 75W-85 this weekend at 11k vehicle miles.
~3.1 quarts.
I will report the results.
What say the Amsoil

$29 75W-90 Synthetic Gear Lube - 1 Quart (Pack of 2)

75W-90 crowd ?
Is viscosity an issue ?
Click to expand...

Nope. Unless it can reduce vibration resonance... and it can't, so nope.

trazerr · Feb 16, 2018

taco woodeye said: ↑

TY @skiploder. The teardown and the comments from real experts--that's the money shots !

FWIW.
The vehicle in my signature.
Date of manufacture 11/17 at San Antonio.
Date of purchase 12/30/17.
I get the sound at ~60 mph.
I am a delivery driver subcontractor.
The factory rear axle fluid will be changed out this weekend
for Red Line GL5 75W-85 this weekend at 11k vehicle miles.
~3.1 quarts.
I will report the results.
What say the Amsoil

$29 75W-90 Synthetic Gear Lube - 1 Quart (Pack of 2)

75W-90 crowd ?
Is viscosity an issue ?
Click to expand...

I'll be going the Amsoil route when the time comes. The Amsoil dealer is 5 mins from my work so I figure why not. I plan on keeping this truck for 10yrs minimum so I might as well go big ha I run Red Line in my 1st gen manual trans. I switched to it around 200k and I swear it made a difference shift wise. Could have been placebo, but that truck has gone into 1st gear easy ever since the change.

*For the record I dont expect Amsoil gear oil to reduce my rear diff noise. Its just solid all around fluid! ha

Dacon · Feb 16, 2018

ALL my oils are AMSoil. No complain.

Bryan502 · Feb 17, 2018

Rotekk said: ↑

My dealer told me to take a hike. I called corporate and they denied it existed. I called my case manager and she said it did not exist and there is no solution. I asked for her supervisor and she denied and told me that's Toyota's position.

I then rerouted back to customer care and requested a case manager supervisor . Magically this supervisor could find it first try and completely contradicted everybody from the ground up.
Click to expand...

Bryan502 · Feb 17, 2018

I got the same run around. Dealership acknowledged the problem....but said they didn't have a fix...sent me away

Rotekk · Feb 17, 2018

Bryan502 said: ↑

I got the same run around. Dealership acknowledged the problem....but said they didn't have a fix...sent me away
Click to expand...

You'll more than likely have to climb higher than them or try a diff dealer. Canada has a different tsb number.

Taco Gusto · Feb 18, 2018

Rotekk said: ↑

You'll more than likely have to climb higher than them or try a diff dealer. Canada has a different tsb number.
Click to expand...

Do you know what the TSB number is for Canada? I'm planning to bring this up at my first service appointment and it seems that having this in hand would be helpful.

Has anyone tried talking to a Canadian dealer about this? If so, what was your experience?

Taco Gusto · Feb 18, 2018

skiploder said: ↑

200+ pages is a lot to go through for people stumbling into this thread. For the sake of clarifying what my truck had and what the tear down revealed, I'll recap it here.

My 2017 OR AC had the howl. After I trained my ear to hear it, I could pick it up quite easily as well as pick it up in other people's trucks. I opened a case with corporate and had my truck checked out by the local dealership. I was told at the dealership that they had replaced a few third members in both second and third gens and the sound always came back. They were the ones that pointed me to the TSB that covered the issue for the entirety of the second gen run.

We have a company mechanic and I have a mechanic for my personal diesel. I had both of them listen to the howl and to my surprise, they both opined that it was "just a noise". That "all rear ends make noise" its just to what degree we can hear them or to what degree the manufacturer muffles them out.

While I took some comfort in this, I was still concerned. Around the same period hiPSI and I exchanged PMs in which he pretty much postulated what both my mechanics said.

We do a lot of crawling (for various reasons) in our Tacoma and with the suspension and wheel/tire mods, decided to go with the 4.88 gears. We are lucky that a fairly nationally renowned rear end shop is about an hour away. We selected our setup and made an appointment to bring the truck in.

I have withheld the name of the shop at the request of the manager. Apparently someone else on a forum named them and they were inundated with calls regarding the howl.

Anyway, I did a ride along with the foreman and he immediately heard the howl. To my surprise he shrugged it off and began stating all the vehicles manufacturers and models with noisy rear end setups. The bottom line was this, the nature of the noise was not indicative of anything other than what he referred to as a NVH issue. I asked them to do a tear down of the old gears as part of the work. They charged me a nominal fee. I left the truck there for two days and returned.

The manager had the old set neatly laid out on an old canvas tarp in one of the storage bays. He proceeded to walk me through the condition of the gears, what they looked for as they were removing them and gave me a fairly detailed outline of what we should have seen at this mileage if there was an issue.

There was nothing of note. Everything was fine. The noise, he said, was due to the nature of the gears, the set up and the NVH characteristics of the truck. Calimed that he's had quite a few tacoma owners come in over the years worried about similar noises, but that the hino rear ends were fairly stout. He said that there was nothing in the setup or the condition of the old set that would have indicated a problem that needed to be addressed. He asked me if I had noted an increase or decrease in the noise depending on the number of passengers, there load in the back, the gear I was in etc. I told him I had not gotten down to that level of scrutiny. He also informed me that the V8 4runners and Lexus GXs were infamous for having a similar resonance that was addressed through a TSB.

Here's the bottom line. I've heard a lot of theories on what this may or may not be. For awhile I was seriously convinced my truck had a problem. After talking to some people who wrench for a living, my fears abated a bit. After talking to someone who sets up rear ends for a living over a wide variety of vehicles and having been taken through a teardown, I would have had no issues keeping the old gears in the truck and not spending another minute worrying about it.

As a hobby, I breed several species of snakes and dwarf varanids....some venomous some not. I've been in that hobby for over 40 years. I have mentored other venomous handlers at both zoos and at veterinary schools. I have consulted with the setup of certain species at zoos and museums. I do lectures and have been cited in scientific literature. While I do not consider myself an expert at anything, I have sent a lot of time working with several specialized species and have a fairly accurate ability to work with the animals both in regards to behavioral issues and in regards to their overall captive well being.

I am also a member of several snake forums. Not a day goes by where someone who claims to be an expert in the field spouts off about something I patently know to be bullshit. I have seen people given advice that probably caused them countless worry or that probably resulted in potential harm to the individual or the animal.

I am well aware that forums in general have given rise to a new breed of experts who have received their knowledge form "Google". They are experts only in parroting what they read on other forums or in various online articles.

nDub, this is not directed at you, but in general this thread has been littered with the opinions of people who arrived at their "knowledge" in a similar manner. While I personally think there may be several things going on with these rear ends, the non-intrusive howl at certain speeds is a resonance issue. Those with noises that are completely invasive and spread over a wider range may have something else going on....but for what I experienced, I can positively attest to the fact that there were no issues with my rear end other than resonance.
Click to expand...

Well written. This provided some insight and reassurance. Thanks for taking the time to post.

Jason TRD OR · Feb 18, 2018

I have an add a leaf what do I do!

Rotekk · Feb 18, 2018

Taco Gusto said: ↑

Do you know what the TSB number is for Canada? I'm planning to bring this up at my first service appointment and it seems that having this in hand would be helpful.

Has anyone tried talking to a Canadian dealer about this? If so, what was your experience?
Click to expand...

here you go.

Taco Gusto · Feb 18, 2018

Rotekk said: ↑

here you go.
Click to expand...

Thanks, @Rotekk. Much obliged.

pjensen641 · Feb 28, 2018

I just noticed, the new spring numbers are again different from TSB 0171-16 for the rumble strip vibration. LOL. Toyota apparently has a tough time with engineering springs. Means some trucks might get two new sets of spring if they have already done the first TSB.

I have an Access cab with BOTH the vibration and the whine. I had the whine diagnosed 17,000 miles ago and have been monitoring for this damn fix thats been 18 months in the making. I hope they get their shit together! I figure I'll take it in before the 3/36 warranty is up and get a bunch of stuff done then.

trazerr · Feb 28, 2018

pjensen641 said: ↑

I just noticed, the new spring numbers are again different from TSB 0171-16 for the rumble strip vibration. LOL. Toyota apparently has a tough time with engineering springs. Means some trucks might get two new sets of spring if they have already done the first TSB.

I have an Access cab with BOTH the vibration and the whine. I had the whine diagnosed 17,000 miles ago and have been monitoring for this damn fix thats been 18 months in the making. I hope they get their shit together! I figure I'll take it in before the 3/36 warranty is up and get a bunch of stuff done then.
Click to expand...

In the other thread for howling a couple of TRD AC owners got their dealer to do the TSB. Not sure how they got them to since it’s for DCs only. Unfortunately I think they still had some noise after the TSB.

I have a DCLB 2018 SR5 so my dealer wont attempt to fix my howl. Maybe your dealer will!

jeffsmitty · Mar 1, 2018

FINALLY!!!!!!! After 3 sets of diff gears and 9 months of waiting Toyota finally got a fix for the rear end howl-whine between 50 and 65 mph. After the third set of gears my service dept. manager at Tuscaloosa Toyota actually tried putting sound deadening dynamat in the roof above the headliner and behind the rear seats. They also undercoated my truck. The result was same freaking noise. After doing all of that he found out that Toyota had actually released the TSB for this issue. That was last Monday. He got parts in yesterday (new leaf springs, and several dampers for the frame and cab mounts. Got it back today and for the first time I have a quiet drivetrain. Here is the TSB and work order. It actually works.

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NEW TSB, Whine Noise From Rear of Vehicle

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Attached Files:

T-TCI-5034-en1..pdf

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Attached Files:

T-SB-0013-18.pdf

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NEW TSB, Whine Noise From Rear of Vehicle

#61 pjensen641 Well-Known Member

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#64 Lt. Dangle RIP @stun gun 2016-2020

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Attached Files:

T-TCI-5034-en1..pdf

#77 Taco Gusto Member

#78 pjensen641 Well-Known Member

#79 trazerr Well-Known Member

#80 jeffsmitty Active Member

Attached Files:

T-SB-0013-18.pdf

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Lt. Dangle RIP @stun gun 2016-2020

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