Rumble sound when accelerating at low speed

karyins

New member
I read about the "rumble strip issue" but it doesn't seem to be the case here. 2004 4wd SR5 at about 60,000 miles, a few weeks ago the rumble sound started to appear intermittently. It's more like a washboard sound, not as loud as when I really go over a rumble strip. I can hear it, not feel it. It happens at low speed acceleration (lightly touch the gas pedal from stop or under 10 mph) most often, but not always. When it happens, it lasts 1 or 2 seconds then gone until I touch the gas pedal again.

Recently I got the cracked dashboard replaced by the dealer, but that can't be it right?

Last year there was a transmission leak, the fluid level went pretty low that the truck felt heavy and dragging for about 100 miles. But since it got fixed there has been no issue, also the mechanic told me that the transmission didn't seem to be damaged at the time.

Both front CV joint boots had been broken for a while now, and sometimes it makes a bit grinding/clicking sound on U-turns. I need to get that fixed eventually but it's probably not the culpit here? Because if it is the CV joints making noise, I should hear it as long as the axles are spinning, right? But the noise only appears when accelerating.

Anyone got similar issue or ideas what it might be?

Thanks!
 
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Sounds like the same problem i dealt with recently. Rumble noise and feel at low acceleration, especially in 4wd. Replaced the cv joints - one was pretty rusted, the other was on its way - and the issue went away.
 
Sounds like the same problem i dealt with recently. Rumble noise and feel at low acceleration, especially in 4wd. Replaced the cv joints - one was pretty rusted, the other was on its way - and the issue went away.

I greased the drive shaft and the noise is still there. Will have to replace the cv axles next. Problem is that I have a 1000 miles trip next week. Is it safe to drive with current condition? I can use 2wd only. Could the cv joint break apart?
 
A mechanic told me it sounds like exhaust shield, not the cv joint. Also my cv axles don't have a play when I shake them. So it's probably not the cv. Then I found this thread here.

http://www.toyota-4runner.org/4th-gen-t4rs/179622-rattling-sound.html

And his video. https://m.youtube.com/watch?feature=youtu.be&v=I-BZphaVfYE

Mine sounds and behaves like his. I got under and found that everything about the exhaust are still tight. But the dust shield protecting the front u-joint rusted and softened so it's barely touching the exhaust pipe below it. Maybe that's the problem.

The dust shield (not sure if that's the name, see the pic) is hung there by a single bolt on one end, and above it is the rotating drive shaft. I can't think of a way to lift it up a bit so it won't touch. Maybe I'll just have to live with the rumble till it rust off completely then get a new one.

Any suggestion? Thanks!
 

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