4th Gen Differential Howl

[GR90]

Here is the noise for anyone interested. When I say on it means I am on throttle and you can hear the noise and off means off throttle and the noise goes away.

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[Regg25]

Having this same problem on my 2025 TRD Sport. Sounds like the exact problem the 3rd gens had. Slight noise coming from the back only when under light throttle at 50-59 MPH. If you let off the throttle or reach a speed outside of 50-59 MPH it goes way. Debating what to do next as the truck only has 400 miles on it.

Has anyone else run into this yet?

Did you ever end up doing anything about your noise? I am hearing the same with my 2025 TRD Off Road. Currently at 1000 miles. Same issue with the noise only present when on the accelerator.

 

[GR90]

Did you ever end up doing anything about your noise? I am hearing the same with my 2025 TRD Off Road. Currently at 1000 miles. Same issue with the noise only present when on the accelerator.

I have not done anything about it yet. Is yours happening in the same speed range?

 

[Regg25]

I have not done anything about it yet. Is yours happening in the same speed range?

Yes, same speed range. Only hearing the humming when foot is on the accelerator.

 

[GR90]

Yes, same speed range. Only hearing the humming when foot is on the accelerator.

Yeah I do plan to take it in soon. Kind of dreading dealing with it, but it is annoying to drive in that speed range.

 

[Chance3]

Looks like Toyota did not fix the infamous diff howl that plagued a lot of 3rd gens. Except now instead of doing it around 55mph it seems to be at 70-75mph when lightly on the throttle. As soon as I lift off the gas it stops. I found one other owner with a 24 TRD Sport who had the exact same symptoms at the exact same speed, their dealer replaced the rear end and the noise went away. My dealer is telling me that's how Toyota designed it lol. Ive been to the dealer twice in the last 10 days for this issue. Truck currently has 700 miles. Highway driving is unbearable.

Yah, don't think that's normal, just got back from a 2200mi trip to New Mexico with no howling. Speeds were between 55 and 85 mph, with snow, rain, and dry roads. I wouldn't be happy either. Good luck and let us know how it turns out. I have 8800mi total on the truck.

 

[GR90]

I am finally taking mine into the dealer next week for this. Will update when I learn more.

 

[Canufixit]

700 miles isn't even close to being worn in. Revisit it around 2500 miles.

After you for out this kind of money - it is either corrected or swapped ...

 

[GR90]

Dropped the truck off this morning and they just called me stating that they believe this is a normal noise for this truck. They claimed the master tech drove another 2025 on the lot and it made the same noise under the same conditions. Not sure if that jives much with me, will probably reach out to Toyota corporate since the last gen had a TSB for this noise.

 

[Burgi]

Dropped the truck off this morning and they just called me stating that they believe this is a normal noise for this truck. They claimed the master tech drove another 2025 on the lot and it made the same noise under the same conditions. Not sure if that jives much with me, will probably reach out to Toyota corporate since the last gen had a TSB for this noise.

lol that’s such bullshit. My original dealer told me the same BS yet refused to take me along for a ride in the other Tacoma they supposedly compared it to. I ended up having to go to a different dealer who took me serious and fixed the issue.

 

[GR90]

lol that’s such bullshit. My original dealer told me the same BS yet refused to take me along for a ride in the other Tacoma they supposedly compared it to. I ended up having to go to a different dealer who took me serious and fixed the issue.

Sounds like I will have to follow your path unfortunately....

 

[yegtaco]

Had a 2024 Sport Premium with zero issues - totally quiet - until I got rear ended and it was written off due to frame damage at the young age of just 7 months...

My new 2025 was whining right off the lot. Could hear it as low as 50km/h and it peaked at around 110 km/h - under even moderate load, but quiet if I took my foot off the gas. Took it into the dealer at 950km and they sent a tech out with me that said he couldn't hear anything (even though anyone that had ridden in the truck could hear it). I was clear that my '24 made no such sound so they couldn't tell me that it was normal. Fortunately the shop foreman took it out, heard it, and knew the issue right away. Diagnosis: "The sound is the result of harmonic resonance from the crown and pinion tooth contact at specific RPM and is not a mechanical defect in the components themselves."

The dealer escalated the issue to Toyota Canada HQ and two weeks later they replaced the rear "carrier assembly" (differential). Back to peace and quiet now thankfully. After the write off and now this, I'm hoping that's it for many years. After all, my 3rd gen Tacoma had zero issues over the 13 years I drove it other than a TSB for the blower motor.

 

[Dansflhti]

Had a 2024 Sport Premium with zero issues - totally quiet - until I got rear ended and it was written off due to frame damage at the young age of just 7 months...

My new 2025 was whining right off the lot. Could hear it as low as 50km/h and it peaked at around 110 km/h - under even moderate load, but quiet if I took my foot off the gas. Took it into the dealer at 950km and they sent a tech out with me that said he couldn't hear anything (even though anyone that had ridden in the truck could hear it). I was clear that my '24 made no such sound so they couldn't tell me that it was normal. Fortunately the shop foreman took it out, heard it, and knew the issue right away. Diagnosis: "The sound is the result of harmonic resonance from the crown and pinion tooth contact at specific RPM and is not a mechanical defect in the components themselves."

The dealer escalated the issue to Toyota Canada HQ and two weeks later they replaced the rear "carrier assembly" (differential). Back to peace and quiet now thankfully. After the write off and now this, I'm hoping that's it for many years. After all, my 3rd gen Tacoma had zero issues over the 13 years I drove it other than a TSB for the blower motor.

Your 3rd gen didn't howl. I had a 2020 OR and a 22 Sport..they both howled. My 2024 Sport has a slight howling.. not bothersome.

 

[Canufixit]

Pinion Preload is wrong .... Bring it back to the Dealer - get a tech to ride with you to prove the howl - they will replace the guts .... About 2 hours. They Did my 2012. If they balk - pick out a new on on the lot and demand a test drive - bet it is quiet. Then they will agree,

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