3rd Gen Poll: Rear End Noise howling when feathering throttle

I hope for your sake that Im wrong. For 40K, anything short of perfect, isnt good enough.

 

I agree completely.

 

Exactly!

 

Well, if they aint gonna fix it, maybe peanut butter would work. It'd be so thick it couldn't howl anymore!!!

This issue going unresolved for so long is beyond stupid. Mine didn't start until about 1200 or so, same thing, I wouldn't have bought it either if I had heard that.

 

Does the howl get louder with time?

Mine just started and it's annoying but isn't loud enough to drown out a conversation or the radio on low.

 

Surely Toyota engineering knows what the root cause is by now.

 

It starts out faint (for me) at about 1500 miles then slowly gets louder before leveling off at a nice annoying volume (25,000 miles now) that you can hear over your radio and causes all your passengers to ask what it is. Run on sentence!

 

I'd be willing to bet they knew during testing and a decision was taken at some point to just roll with it. Seriously: we need another poll - has anyone been in a 3rd Gen that did NOT have some level of the whine from the rear? My limited experience of 3 or so other 3rd Gens has them all making some noise.

 

Thanks.

 

My understanding is that they know exactly what and where the noise is, per my dealer's Toyota rep.

 

Can you elaborate? My head is going to explode. You didn't press that rep for details?

 

The dealer didnt give me the exact details, so any information I could give wouldnt be accurate. Ill call him, see if he can give me the details.

 

There is a guy recently that changed his diff fluid with a very nice write up on the procedure. Long story short he had 10K on the truck and found the diff fluid to be very dark in color with buildup on the drain/fill plug. He has sent his old fluid to blackstone for it to be analyzed. should hear something in a week or two im guessing. May help shed light or may not. worth a look though
cant seem to locate the thread at the moment but im subscribed so I will post the link when he gets results back.
found it
https://www.tacomaworld.com/threads...ission-6mt-fluid-change.481719/#post-14695710

 

I had mine replaced when I had the TSB done. It didnt help at all.

 

Just got word from my dealer.....Toyota does not show an approved repair for this concern. My dealer got in 'trouble' for installing a new rear last visit, without obtaining prior permission from Toyota corporate first. At this point, I'm supposed to just deal with the noise, call Toyota corporate to raise a stink a generate more awareness with Toyota about this problem.

Damn, didn't realize my damn-near $40k pickup was going to come with this much 'homework'.

 

The TSB isnt an approved repair?

 

Not in the way my service writer chose to spin his words....and in all reality, I had the TSB performed to address crappy shift points and a lunging forward at idle, not the differential howl.....so I doubt it will do too much to help. Also, in the way my writer was talking, there isn't really anything that CAN be done to address this issue, at this time, that Toyota will agree with or stand behind. Simply put, because there is no solution that they approve of(other than to pull the gears and re-shim a brand new rear, which they refuse to acknowledge can be done), there is nothing to be done.

Ridiculous.

 

Just to be clear. There is no TSB that specifically addresses the rear diff howl. There should be, but there isn't.

 

For those that have the whine, have you tried shifting from 6th to 5th? Does the whine persist if you do?

My truck started making a whining noise around 5500 miles. I'm currently at ~6000 miles. From what I hear I can tell I have a whining noise, but I wouldn't say that its coming from the rear end. It happens only at above 55 mph, when traveling at that speed I'm almost always in 6th. The other day I decided to change into 5th and when I do that I can no longer hear the whine at 55-60 mph. I also tried reducing the speed of the truck so that the rpms in 5th match that of 6th gear at 60, still no whine. Just wondering if anyone else can replicate this?

 

I just had a TSB performed that was for the howl.

TSB-0186-17 per the dealer