My quest to find the rattle/chatter.....

Ol'Blue

New member
Alright,

As much as it pains me to do this I'm out of things to think of at this point. As the title says I'm still hunting down the chatter sound in my truck. It is random but if I hit a bump it will come and go and you can definitely hear it even in the cab at 60mph. There is no speed it comes on at or when you turn left to right. All the pulleys, belts, timing components are new to include the water pump and the fan bracket pulley. The only thing on the front of the engine that has not been changed out is the fan and the fan clutch.

This last Thursday I had it on a lift and took the front wheels off thinking that maybe the pin that hold the CV axle nut/ nuts had come off and it was rattleing around in there. Nope all is good and snug as a bug. It is defiantly in the front half of the truck and that is clear as day. I have to be at speed going down the road for it to come out also. I tried just rev. the engine and nothing ever came up. I wish I had an all wheel drive dyno to put it on and run it at 70 MPH so I can find this SOB.

I found a few things loos and fixed all that this last go around and still no luck. I thought it might be my transfer case low on fluid, Nope all good ( Although I did find out that I need a front and rear seal for it, I now have the OE seals in hand)

The only other thing that I have found loose is simple. The hood latch has a broken bolt on the left hole. I need to tap and dye that thing out. Any one what size I will need for that one? Any help at this point wold be welcomed.

PS- I have also checked for rocks in the skid plates. All good on that one too.

Blue
 
Register to hide this ad
Alright,

As much as it pains me to do this I'm out of things to think of at this point. As the title says I'm still hunting down the chatter sound in my truck. It is random but if I hit a bump it will come and go and you can definitely hear it even in the cab at 60mph. There is no speed it comes on at or when you turn left to right. All the pulleys, belts, timing components are new to include the water pump and the fan bracket pulley. The only thing on the front of the engine that has not been changed out is the fan and the fan clutch.

This last Thursday I had it on a lift and took the front wheels off thinking that maybe the pin that hold the CV axle nut/ nuts had come off and it was rattleing around in there. Nope all is good and snug as a bug. It is defiantly in the front half of the truck and that is clear as day. I have to be at speed going down the road for it to come out also. I tried just rev. the engine and nothing ever came up. I wish I had an all wheel drive dyno to put it on and run it at 70 MPH so I can find this SOB.

I found a few things loos and fixed all that this last go around and still no luck. I thought it might be my transfer case low on fluid, Nope all good ( Although I did find out that I need a front and rear seal for it, I now have the OE seals in hand)

The only other thing that I have found loose is simple. The hood latch has a broken bolt on the left hole. I need to tap and dye that thing out. Any one what size I will need for that one? Any help at this point wold be welcomed.

PS- I have also checked for rocks in the skid plates. All good on that one too.

Blue
So, it's associated with motor speed, not rolling speed? Is it metallic, tinny sounding or heavier clunky sound? (sorry for the bad adjectives, hopefully you get the idea)
 
So, it's associated with motor speed, not rolling speed? Is it metallic, tinny sounding or heavier clunky sound? (sorry for the bad adjectives, hopefully you get the idea)

I get it. It has nothing to do with Engine RPM. I have tried it that way thinking it was an Engine issue but I'm pretty sure it is not. It is something metallic for sure. It almost sounds like there is a washer that is rattling around on a bolt some place. It is not a clunk sound at all. It almost sounds like when a throw out bearing goes out in a clutch. That chatter sound it makes.

At this point I'm going to pull all of the skid plates and dive it that way. If that is not it which I'm sure it is not because I have tried that before I'm going to pull the CV Axles and see if they make noise if I shake the hell out of them or just replace them under warranty just to be safe.

After that I'm not really sure what to try at this point.

Blue
 
You've probably seen these threads but here's what I found while undergoing the same quest:

Over the weekend I found the metal on metal rattling noise that has been making me crazy for months.

I happened to park facing up on a fairly steep driveway and while jumping out of the truck I heard the noise. I gave the truck a good shake and sure enough - there it was. So I took the opportunity to roll under the truck and had my buddy shake the truck side to side and located the source.

On level ground there must be enough pressure on the rear swaybar to keep the end link bushings in contact with the mount - which is why in the past I have been unable to reproduce the noise. While parked "uphill" it took the pressure off the rear swaybar and the endlink (old, hard, cracking) bushings and the endlink clanged around on both sides.

I didn't have the time to run to the store to buy new bushings and I was unable to tighten as the treads were bottomed out - so I added a couple washers for now and that will hold me until the weekend when I can get in there and make the proper repair.

http://www.toyota-4runner.org/3rd-gen-t4rs/138032-rattling-sound-only-when-accelerating-3.html#post1696306

http://www.toyota-4runner.org/3rd-gen-t4rs/170422-high-speed-rattle-undercarriage.html

http://www.toyota-4runner.org/3rd-gen-t4rs/138032-rattling-sound-only-when-accelerating.html
 
Does the noise go away when you are on the brake? Maybe it's the brake pads rattling against the rotor? The happened on my 4runner when the retaining clips/springs were worn out.

You could try jacking up the front end and (carefully) whacking different parts with a rubber mallet. That's how I found my rattling brake pads.
 

Members online

Forum statistics

Threads
278,316
Messages
3,554,120
Members
248,016
Latest member
Advally Service

Trending content

Back
Top