Rattling type noise (Diesel sound)?

mikey05, thanks for your input; however, some posting here have indicated that work has been done, eg., replacment of throwout bearing and/or replacement of input shaft bearing, all to no avail. One person has had the bearings in the transmission worked on and that has worked so far.

Again, if this is a mechanical problem that can lead to other problems, as opposed to just a noise issue, then heck yeah I want mine fixed with the right fix, not just a lets replace this part and see if it works and if not will try another one next time. Also, with so many doing this, if a particular fix is determined to be "the one", is the part defectively designed, and if so, has it been redesigned so as to not happen again?

If this is a mecahnical problem that can lead to other problems, Toyota needs to figure it out and issue a TSB with the appropriate fix. If it is just a noise issue, then I will leave mine as is. By the way, I kind of like the sound .

 

The last time I dropped my truck off at my dealership (simple oil change/tire rotation service) it came back missing a wheel center cap. The time before that (defective radio replacement), it came back with grease on my seat and my dash all gouged up around the radio and HVAC controls - requiring yet another trip back later to install the replacement parts to fix that. Let's just say I don't have much faith in them experimenting with my truck to try to figure this out. Unless it gets worse, I'm just going to wait and keep my eyes open for a TSB - which will tell the techs EXACTLY what to do. If you have the noise and trust the techs at your dealership, by all means take it in and see what they think.

 

I trust the tech with whom I have been dealing on this issue. However, I don't just want an investigation. I want to know if a fix is required and if so the fix, eg, a TSB.

A post on my other thread in the 4 cylinder forum says that they relaced his whole tranny in an 09. He provided the name of his dealer. I will see if my dealer will call over to his dealer to see whats up.

By the way, the noise has been difficult to notice lately at times (have to listen real carefully). As previously stated, it becomes more noticable after a longer trip with A/C on, like today.

I am looking forward to a resolution of this issue. I hope Toyota is reading this stuff.

 

Please keep us updated. Thanks.

 

Okay, today I was in the "big city" over 200 miles from me. I went to a dealership there. The tech and I listened to the noise that I described above come and go as I manipulated the clutch (a/c on), and he said it was a normal noise characteristic of this type of truck. He said he has had a number of people come in with a question on this. They basically all do it, he said.

He said it is an inherent noise that has something to do with the clutch that goes away when you press on the clutch pedal. His opinion is that it is not any kind of mechanical problem.

If you have any concerns, then have your Toyota Tech check it out. After all, we may not all be talking about the exact same noise or degree of noise.

 

****READ THIS*****my truck made a little noise with your foot off the clutch in nuetral. also made a knocking noise when driving in gear (like a diesel but much louder). i believe i have found my problem. for one my throw out bearing has some play in it. but the other problem is.... on the clutch in the center of the clutch disk where the splines are, it has play/ a little wooble. that is not supost to have any play. So everyone check your clutch disk! & throw out bearing! i got my tranny out now and thats wat i found. bout to order my parts. im getting new chutch , throw out bearing & pilot bearing.

 

How did this go? Did it resolve your problem?

 

My '08 makes this noise.. only 13k on it. I started noticing it once I turned on the AC or just having the fan on.... That seemed pretty strange to me and not sure how that could be related to the TO bearing but I'm not an engine/drivetrain expert...

The truck drives fine, no vibrations or anything.. I'm just watching to see what solution, if any, Toyota will come up with... mine also has a noticeable 'clunk' every time I take off for the first time after the truck has been parked for a while... all these have been noted as 'normal' noises in the past..

 

You might want to check out my other thread on 4 cylinder entitled "Poll: Diesel like noise clutch determinative?. It is not very recent, so you would have to search in that forum under "diesel".

 

I think this is axle wrap. Normal

 

Thank you sir... cuts my 'issues' in half..

 

I have the same thing, though it has nothing to do with the AC. I almost never use the AC in my 07.

Anyway, I've kind of assumed it was just the nature of the truck, but I did want to know if a lot of other people had noticed the same thing. Since I see plenty of others have the same sound, I'm not terribly worried about it.

My personal opinion, it just sounds like gears turning to me, as someone else said. I'm not a mechanic, but when you release the clutch in neutral, you are applying power to at least one shaft inside the transmission, right? It's just idling. Well if it's turning even one gear, I can easily see it making that sound.

 

I think I figured out how to post a link. Here is the "Poll synopsis" from the 4 cylinder forum on this: http://www.tacomaworld.com/forum/4-cylinder/50626-poll-diesel-like-noise-clutch-determinative-3.html

 

One other thing...and again, I'm not an expert...

But if it was due to a bad throw-out bearing, wouldn't we here the noise at the opposite time? When the clutch is pressed in and there is pressure on the throw-out bearing? Mine sounds fine with the clutch pushed in. This is another reason why I think we're just hearing gears turning at idle in the transmission.

 

Exactly. It's not the throwout bearing.

 

I had the same issue with a new 2000 Corvette with the ZF box. Dealers response was normal transmission noise. Some say depressing the clutch while turning engine off reduces the noise. It never caused any problems in the Vette.

 

2010, 5sp, 4x4, about 1500 miles and no noise with clutch in or out.

 

I had the same problem, but mine is an automatic and when I put it in neutral the noise would go away. The problem ended up being one of the belt pulleys, the bearing was going bad. The Dealership replaced it under warranty. I hope this helps.

 

Completely different issue....or in our case, hopefully non-issue.

 

When you push in on the clutch is when there is pressure on the throw-out bearing. If there's no noise when there is pressure on the bearing, I don't think you'd hear anything when there isn't pressure on it, and that's when the noise is present.

Again, it just sounds like gears turning to me. That's not to say it isn't louder than I would expect, because that's what brought me to this thread. I'd been wondering about it too. The fact that everyone seems to hear the same thing reinforces my feeling that it's nothing to worry about.