Grinding noise on 4wd Auto when turning - front and rear - Toyota RAV4 Forums
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#1 (permalink) Old 01-24-2011, 10:54 AM
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Grinding noise on 4wd Auto when turning - front and rear

I just picked up a 1996 $wd rav4 4door with Auto tranny 113,000 miles

I am pretty sure this does NOT have limited slip

There is not any noise when going straight or making slight turns.

The Noise comes in when you are making tight turns like in a parking lot or turning into a side street. from the drivers seat it sounds like it is coming from the rear. but when I get out and have my wife drive in circles in a parking lot it sounds more from the front.

Diagnostics:

1. I jacked the RAV up and got all 4 wheels off.
2. I visually inspected all parts
Some play in both front Axle Shafts
Some visual run out on the left rear axle shaft (wobble) CVs seem tight
There has been new Dif mounts put in the rear
I did not check the engine mounts (think I will tho)
3. running engine and in gear listened to all the components individually
No noise in the tranny
No noise in the transfer case
No noise in the rear dif
Some noise in the outer left rear hub bearing
No noise in the front hubs or the right rear
When I turn the front wheels to the right or left I hear some notable grinding in the outer CV

4. once I was certain I did not have limited Slip I locked one wheel in the front and had my son rev the engine slightly forcing the differential to do it's thing. and I listened to the diffs and tranny and heard no noise.

5. I also locked the emergency brake and reved the engine slightly to force the front to stress some and heard no noise. (note I did not rev too much )

observations:

1. I will be replacing all 4 CV axles and left side outer HUB in rear

is there anything else I am missing?

Any comments on my test methods besides "you should never rev the engine when the emergency brake is on and in gear"

any other tests?

the thing that has me questioning myself is that I have never experienced the noise coming from rear on front CV joints and that leaves only the differential in the rear to make the noise when turning. and I have never heard this kind of noise from an open dif. locking and limited slip difs will make noise when they are dieing but this one is loose enough I can stop one side by hand and hold it while is transfers power to other side. and there is no noise even faint that might get worse when under load.
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#2 (permalink) Old 01-24-2011, 11:14 AM
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Garage
Can you describe the nature of the noise?
Is it high pitched howl, a low rumbling or a grinding noise.

Seeing you are talking about grinding noise when the tyres are in full lock:
Have you taken a look at the timing belt and the power steering motor? It will cause noise when worn/ damaged.
If the power steering motor is bad, it will also cause a higher pitched sound during full lock.
Greetz

Pim

Driving a BMW318i with LPG at the moment. Had a 2.0 RAV4.1 1997 3drs 4WD euro model w/ABS dual sunroof blue two tone previously.
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#3 (permalink) Old 01-24-2011, 11:43 AM
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noise

it is a grinding popping noise, comes in around 2/3 or the turn of the wheels.

I am pretty certain the outer CV on the drivers side is shot bad, and the passenger side is bad as well but not real bad.

I have not checked Timing belt is there a way to inspect these without a full tear down?

The steering pump seems OK
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#4 (permalink) Old 01-24-2011, 05:09 PM
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Your symptoms are VERY similar to mine. Well, I'd even say identical !!

http://rav4world.com/forums/viewtopic.php?t=29234


I'm due to have more inspections and hopefully a fix tomorrow (Tuesday) at local garage. I believe it's probably front bearing(s) as my garage man is almost convinced it's not the front CV's.

I'll post as soon as I know more.
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#5 (permalink) Old 01-24-2011, 11:23 PM
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Timing belt would not start and stop with the turning of the wheel.
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#6 (permalink) Old 01-25-2011, 09:07 AM
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new Symptom:

today I noticed that when I put the Rav in drive and pull forward then stop and put in reverse if I accelerate briskly I get a noticeable "clunk" only one but it is a solid clunk. When I put back in drive I do not get a reply. there is no reset or clunk, but when I go back to reverse I get the same clunk again. This sounds like it is coming from the rear not the front or middle.
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#7 (permalink) Old 01-25-2011, 09:20 PM
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Quote:
Originally Posted by kellyk7
new Symptom:

today I noticed that when I put the RAV in drive and pull forward then stop and put in reverse if I accelerate briskly I get a noticeable "clunk" only one but it is a solid clunk. When I put back in drive I do not get a reply. there is no reset or clunk, but when I go back to reverse I get the same clunk again. This sounds like it is coming from the rear not the front or middle.
You can check the front and back engine mount, maybe they need to be change
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#8 (permalink) Old 02-01-2011, 02:02 PM
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Ok I have found some resources and done some more testing I am pretty sure this is growling from the center dif. it sounds a lot like the grind I used to get from some limited Slip difs.
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#9 (permalink) Old 02-05-2011, 07:57 AM
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Hi. I have the same problem with my 01 rav but the clunking appears to be coming from the transmission. Went to the dealership several times but they could not seem to address the problem. Initially, they thought it was the front brake caliper mechanism but the clunking still continue.
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#10 (permalink) Old 02-06-2011, 06:33 PM
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hey guys i had a clunking noise and it turn out to be the stabilizing bar link went bad, check on your.
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