Strange Vibration/Rumble at 40 MPH - Page 2 - Toyota RAV4 Forums
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post #11 of 24 (permalink) Old 10-11-2011, 07:24 PM
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Originally Posted by ReillyS View Post
My RAV is very well maintained, needs nothing to be done except the next maintenance on schedule after the 90,000 mi. point. Brakes, tires, exhaust and all items are up to date.Toyota oil change and fluid refills are also recent, done every 5,000. mil per the manual, including tire rotation EACH time since I bought it. In Early January 2011 I began to experience a vibration from under the vehicle. The first thought was that it was an exhaust rattle and had it checked for looseness. All ok, nothing was needed, the vibration remains and has grown worse. It occurs between 35-45 mph, and ceases if I let off the gas - but to maintain the speed in that range it is LOUD enough that anyone in/out of the car can hear it. Add to that now, an occassional sound as though I am on a rumble strip - exactly at 40mph. I went back to my mechanic because I was concerned about safety. He kept the car for the day, drove it, put it up on the lift and checked everything below and wheel assemblies & brakes. I am mechanically safe and sound., but now I'm at a point I can't stand this anymore, and actually if I were to consider trading it in, this problem can count against the integrity of this vehicle. Suggestions Badly needed!
UPDATE: PLEASE READ:
I previously asked for input regarding loud vibration coming from underneath my 2006 RAV between 35-45mph. With answers from members of this site, I made an appointment & went to the local Toyota dealer I purchased my RAV from.
U{DATE: 10/11/11
My request was to take the Tech for a ride to concentrate on this noise , we stopped a couple of times and he exited the vehicle to examine/touch a couple of areas he was thinking about. This is a LOUD vibration that seemed to emanate from the underneath-front of the RAV, and ultimately was hard enough to cause the exhaust system to vibrate down to the tailpipe. There also was an occasional sound resembling a "rumble strip" . After tightening a couple of items that MAY have contributed to the noise, the tech took it for another ride and there was no difference in the problem:
Bottom line: California Toyota Tech support advised a tranny power flush & Tech performed this as advised
and we went out for another ride. The sound was greatly reduced! Being that there is still a slight vibration left, I was advised to put some miles on this to see how the new fluid breaks into the transmission. Tech advises that another flush be done if this doesn't cure it, as this was also recommended by CA TAS. IF this does not totally eliminate the issue.
CA Tech Support advised that the transmission be shifted in a 180 degree position from the original position. Previous cases concluded with success. Cause may have been moisture in ATM fluid at an early time in it's life and caused the droning sound. Love my RAV TECH! Left no stone unturned!
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post #12 of 24 (permalink) Old 11-28-2011, 06:35 AM
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We are having the same rumbling with our '08 Rav4 (104k).

Your tech performed one power flush and suggested you drive
on the new fluid for a while before additional procedures.

Did this solve the problem or did you do another flush
or shift the transmission 180 degrees from the original position.

Finally what does it mean to shift the transmission 180 degrees?
I can't visualize what that would mean or entail.

Thanks a ton
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post #13 of 24 (permalink) Old 06-20-2013, 04:09 PM
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So I'm not crazy!

Finally found someone with this issue. 2006 4WD. Ours has been doing it since probably 30k miles. When decelerating or accelerating briskly, there's no sign of it. At about 35-40 mph under light acceleration, the RAV suddenly starts making the "rumble strip" sound. I think it sounds more like a large, hollow, plastic box vibrating like crazy.

The good news is that it's been happening for probably 4 years/40k miles now and doesn't sound any different than when it first started doing it.

It's irritating, no doubt, but hasn't been costly. Yet. Other than the popping steering cable the vehicle has been great.
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post #14 of 24 (permalink) Old 08-28-2013, 03:39 AM
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Same issue here, have you had any solutions on this issue??

I own a 2006 rav4 4WD 4 cyl with only 45k miles (not under warranty) and recent transfer case oil change with no improvement at all...

I've read it could be Drive Shaft U Joints, center bearings, ATF flushes, and many other stuff without positive feedbacks.

Hope you see this message and provide your past experiences as it's been a while.

Regards
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post #15 of 24 (permalink) Old 01-16-2015, 09:57 AM
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Originally Posted by snorting View Post
Same issue here, have you had any solutions on this issue??

I own a 2006 rav4 4WD 4 cyl with only 45k miles (not under warranty) and recent transfer case oil change with no improvement at all...

I've read it could be Drive Shaft U Joints, center bearings, ATF flushes, and many other stuff without positive feedbacks.

Hope you see this message and provide your past experiences as it's been a while.

Regards

I don't know if anyone is still following this issue. I have a 2006 4WD 4cyl and I'd pretty much resigned myself to driving in 3rd gear rather than overdrive to avoid the rumble. I only used OD when on the highway and safely beyond the 40-45 mph range where it occurred. My RAV has been making the rumble since about 30k miles or so, I have 90k now.

The last time I was having my oil changed, they suggested changing the transmission fluid and told me it was BLACK. Not sure what that means as I didn't think modern ATs needed fluid changes. Of course it was way too expensive to have it done at the oil change place, so I made an appointment to have it done at a trusted mechanics for half the price.

So I had it done 2 days ago and the rumble has disappeared completely. I even try to bring it on by driving at 40mph in OD with light acceleration - nothing.

Hopefully this will be my last AT anyway. I'm going out of my way to order MTs from now on. ATs are nothing but expensive trouble and give you so much less control of the vehicle.
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post #16 of 24 (permalink) Old 01-16-2015, 04:29 PM
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[QUOTE=baccaruda;1697081

The last time I was having my oil changed, they suggested changing the transmission fluid and told me it was BLACK. Not sure what that means as I didn't think modern ATs needed fluid changes.[/QUOTE]

A/T do require fluid changes as do M/T. If you never change the fluid sooner or later the transmission would fail. There is so many misconception or myth spread around this subject that most can't tell what is true or false.
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post #17 of 24 (permalink) Old 02-27-2015, 08:02 AM
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I had the same issue with the rumbling on deceleration. Went to the dealer and they said it was the torque converter and it needed to be replaced....for $5k. Didn't take that option and instead read here about the changing of the fluid. I got a transmission fluid flush/replacement from my local service center and I'm waiting to see if it affects it or not. The transmission hasn't had any service up to this point.

Had the fluid flush/change and the shudder has stopped. That's with only one day of full driving, though. I'll have to see if it lasts, but so far so good.

So far as of today December 30, 2015 the shudder has not returned.

2005 RAV4 Auto/AWD 155k miles.

Last edited by virginiajim; 12-30-2015 at 01:54 PM. Reason: Updated information
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post #18 of 24 (permalink) Old 09-05-2015, 04:06 PM
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hey all, if anyone is having this problem i found the fix! (for mine at least) any time i was driving over 70 km/h (40 mph) i would randomly get the dreaded rumble strip noise from the rear of the vehicle. i also had an intermittent O2 sensor problem which would turn on the check engine light (CEL). when the CEL was on the VSC and 4WD were disabled... but the droning was gone! so i tried to macgyver a way to trip the CEL light with no luck. finally i got fed up and just unplugged the 4WD ECU (computer) and voila rumble problem solved! i haven't noticed any side effects of doing this, but am unsure if its constantly in 4wd or 2wd. any who, when i did a search on the part number of the ECU (89630-42010) i found this wonderful article.

http://rav4world.com/tsb/2007/TC006-07.pdf

take a quick read, toyota knew about this problem and offered a fix. apparently not everyone got the memo, me included. so i don't suggest you do what i did since i have no idea what the implications are but... here's how i did it. check out the bottom of the third page (CH 68) here

http://rav4world.com/pdf/2006/2006_4wdsystem.pdf

This shows the rough location of the 4WD ECU. to get there you have to remove a little plastic plate underneath the glove box forward of the door. take a flash light and look up and you will see a little black box roughly 4" x 4" with a 2" wide wire harness coming out of the bottom. the ECU is bolted to a bracket with a 10mm bolt which i suggest taking off since there is a clip on the back of the wiring harness which you need to see to figure out.

at the very least this will let you know if it has something to do with the 4wd system or is something else all together. hopefully this helps!
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post #19 of 24 (permalink) Old 09-05-2015, 05:37 PM
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You may have hit upon something. If the OP can get his hands on a "loaner" 4wd ECU, he could cheaply determine if that was his problem instead of randomly replacing drivetrain parts.

2009 Base I4 automatic
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post #20 of 24 (permalink) Old 09-05-2015, 06:36 PM
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You may have hit upon something. If the OP can get his hands on a "loaner" 4wd ECU, he could cheaply determine if that was his problem instead of randomly replacing drivetrain parts.
yup you are right, could be any of the various sensors that feed into the ECU that could cause this. however seeing there was a recall for that specific unit it seems like that would be the most likely cause. either way i am currently far too cheap to replace the unit. I have found the wiring diagram for the ECU and will be installing a switch for the power supply line so that i can activate the 4WD in deep snow conditions (here in canada) as needed.
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