Wierd rear end vibration and noise while turning

junehhan said:
Well, I had the limited slip friction modifier put in this morning, and it's still doing it. It seems to do it more when i've come to a complete stop, and accelerate as i'm turning. Should I give it a little more time, or should I go ahead and schedule another appointment with the dealership?
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Give it 3-4 days to work in. When I had this happen after a gear change, it took about that long for the modifier to get 100% into all the clutches and then it quieted down.

John
 
TooManyFords said:
Give it 3-4 days to work in. When I had this happen after a gear change, it took about that long for the modifier to get 100% into all the clutches and then it quieted down.

John
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Out of curiosity, what was yours doing when you changed the gears?
 
They didn't put the friction additive in thinking that the lube they installed already had it. After a few days, I was getting chatter and grinding noises as I turned corners at low speeds. After adding it, it quieted down and I haven't heard a peep out of it.

John
 
TooManyFords said:
They didn't put the friction additive in thinking that the lube they installed already had it. After a few days, I was getting chatter and grinding noises as I turned corners at low speeds. After adding it, it quieted down and I haven't heard a peep out of it.

John
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I'm not getting chatter, but I am getting grinding and moaning noises. Thanks for letting me know, and i'll give it another couple days of driving. Out of curiosity, where you also feeling a vibration as well from the rear end?
 
Glad to hear you are making headway Junehhan.

My gears made a slight hum for a few hundred miles and quieted down over time. I have heard from mechanics however, that if the gears weren't installed just right, (they use a micrometer and a yellow paint stick to check for proper mesh), that you may experience noise and such, and the gears will need to be re-adjusted.

I am not a motorhead and do not know the proper terms for what I am trying to say...maybe some else can explain further.
 
maybe...

Just a thought, maybe the amsoil is working better than the stock fluid... maybe you are slightly spinnig the inside tire when under power and turning, as the clutches may be sticking together better?
 
CRUZTAKER said:
I am not a motorhead and do not know the proper terms for what I am trying to say...maybe some else can explain further.
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I think you said it just perfectly...
 
looking97233 said:
Just a thought, maybe the amsoil is working better than the stock fluid... maybe you are slightly spinnig the inside tire when under power and turning, as the clutches may be sticking together better?
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For the clutches to be sticking better, they'd have a harder time releasing grip from each other. And the release would be more violent. And/or they would occasionally chatter from the momentary occasions where they would actually grip and then let go.

Whenever I've had diff fluid / additive problems, it's usually been a case of groaning... not unlike what you would hear from a noisy dry hinge (creak) on a house door, except that it would be much deeper in tone and more metallic/hollow.

Whine or howl when turning, you'd have to think of why this would happen when turning... usually this is a sign of misadjusted gears as Barry mentioned, but the question is which gears? If it's not the pinion versus ring contact (which would be audible even when going straight), it would have to be a set of gears that only act when you're turning. And these are located WITHIN that hollow shell that you see when you pop the diff cover... it's this hollow shell (carrier?) that has the small gears that permit the different axle speeds... could be the gears on the ends of the axles as they mesh with the other idler gears, since there is only movement between these two when the speeds are different between each axle. Otherwise, the carrier housing applies equal force on both axle gears through each idler gear.

Here's a good set of pages describing what happens when you turn.
http://auto.howstuffworks.com/differential.htm
(just took a look at the site... replace 'idler' in my description by 'pinion' although they mean the small pinion gears, not the big mofo at the transmission shaft - the 3rd page is really good at illustrating a turning car)

So in short, maybe the pinion gears or axle gears are the problem?
 
Thanks guys for your help. It didn't go away, so I made an appointment with my stealership's service department. Bottom line, is that the blokes who work there are telling me that it's normal. I've just lost any faith i've had in them again as if this was normal, it would have done it when I first bought the car. It is more like a groan as Steve just described. When I confronted them on how this was normal, they told me that it's just normal clutch action on the differential and that they get noisy over time. I've pretty much had it with these guys, and the only reason I keep going back to them is because I am hoping they will somehow become competant one day. I would have asked for the manager of the service department, but he was on the phone cussing someone out so loud, everyone could hear and was staring at him. Right before he slammed the phone on someone, he was accusing them of "bull****" or something like that. I figured with the service manager so angry at someone, I better avoid him.
 
june....

After all you went through to get the car.....YOU SURE HAVE HAD A BUNCH OF PROBLEMS!!!!!

May be time to pursue the "Lemon Law" and push for a new car while they still have some....Just a thought?? ;)

My car has been perfect from day one and it was built about the same time as yours....November 03??

I feel for ya man!! :(

Good Luck!!

Marauderjack :up:
 
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If this problem started shortly after putting the Amsoil in, why not just drain the Amsoil and put in the specified Ford oil? Even then it might take a while to clear up as the clutches now have a coating of the Amsoil on them. Taking the diff cover off and spraying some parts cleaner on the diff might speed up things.

Limited slip clutch packs and the oil (with friction modifiers) can be a delicate combination. I would recommend getting back to Ford specified lubricants here.
 
Yeah, i'm actually considering doing that just to see whether there is any difference. However, i've used this same Amsoil Series 2000 75w90 gear lube in other vehicles with the Ford traction-lok differential without any problems, and didn't even need to use the friction modifier additive in those cases. I used it in my old 01 Cobra, the 02 Lightning, and my Crown Vic with no problem, although I believe the 00 Crown Vic used a standard open differential. I figure if anything, this will give me peace of mind and help me eliminate the possibilities and ultimately narrowing down to what it could be.


Jack, the problem here is not the car. The problem, is with people who offer crummy service, and don't give a care about you by providing less than the bare minimum they need to. My problems are actually pretty minor as I have the ticking which it appears a few of the people have. As far as the a/c clutch chirping goes, it was fixed by having the shims reseated which is also minor. As far as the moulding goes that needed replacing, that's pretty minor as well. Once I figure out why i'm getting this moaning type noise from the rear end, and Ford releases a fix for the ticking issue, i'll be set and happy once again :) Trust me, it may seem like i've had problems, but you don't know what problems are until you've owned a Land Rover product.
 
I have a friend that has a Land Rover and he spent $1700.00 on a 100K mile tune-up.....He said NEVER AGAIN!!!

I hope you get the rear end as well as the ticking fixed to your satisfaction!! I had a high mileage CV (200+K) and the axles were ruined by the bearings!! It sweems Ford has had a bunch of "soft" axles since the Ford dealer in Charleston had 24 sets in stock for police vehicles!!! That ought to tell ya something!!

Good luck with your dealer!!

BTW....My dealer agreed to replace my rear tires under warranty over a month ago and still hasn't gotten the tires?? They say they are back ordered.....I can get them from Tire Rack in 2 -3 days??? Go Figure!!??

Marauderjack :(
 
It's the small one......I don't know much about them and really don't want to!!! :nono:

It supposedly has a BMW V8 engine and leaks badly!! :flamer:

Marauderjack :)
 
Marauderjack said:
It's the small one......I don't know much about them and really don't want to!!! :nono:

It supposedly has a BMW V8 engine and leaks badly!! :flamer:

Marauderjack :)
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Jack, your description doesn't help me as all Rovers always leak. As far as the engine goes, Land Rover just started using a brand new BMW V8 starting with the 03 redesigned Range Rover, which has a 4.4 litre BMW V8 making 282hp. If it's an older one, then it's likely the 3.9, 4.0, or 4.6 litre Land Rover V8 which is based on the old Buick V8 engines which I believe originally displaced 3.5 litres. It would either be a Range Rover, Discovery, Discovery Series II, or Defender 90. It probably isn't a D110 since those are really big and super rare. Both of my Land Rover products i've owned were always leaking something, although the new Range Rover looks promising if you have $75k :)
 
It's a Discovery......Probably late 90's??

FUGLY......I wouldn't have one at any price!!! :fire: The guy is trying to get rid of it .....Says it is dangerous at highway speeds in the wind (wanders everywhere) and useless as a truck!! :cry:

It is actually a very small station wagon......HOW DO THEY KEEP SELLING THIS STUFF??? :o

Marauderjack :pimp:
 
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I have to differ with you, because I think the Discovery is the best looking SUV on the market. It looks like a genuine Safari rig, and it's offroading capabilities are unmatched by anything else in it's class. It is one beefy SUV that was designed well for it's purpose, but not built well at all. Land Rover sells these Disco's exactly because they like it's charm, or like the Hamptons status symbol that is associated with it. They were designed more with offroading in mind, not on-pavement driving. If you were to ever take one offroad, you would find new-found appreciation for it as it's just amazing.
 
Well, my Marauder is going in to the local SVT dealership tomarrow to have the rear end differential fluid changed again. I'm going to have them change it using full synthetic Motorcraft gear lube to see if that solves the problem. If not, then i'll probably set up an appointment to have this dealer take a look at it since they are a great dealership, unlike the excuse for a stealership my selling stealership is. I think from now on, i'm going to just let my favorite local dealership do my maintenance anyway, just to simplify things.
 
junehhan said:
Well, my Marauder is going in to the local SVT dealership tomarrow to have the rear end differential fluid changed again. I'm going to have them change it using full synthetic Motorcraft gear lube to see if that solves the problem. If not, then i'll probably set up an appointment to have this dealer take a look at it since they are a great dealership, unlike the excuse for a stealership my selling stealership is. I think from now on, i'm going to just let my favorite local dealership do my maintenance anyway, just to simplify things.
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Well, I had the differential gear lube changed Saturday at the SVT dealership to fully synthetic motorcraft fluid along with Ford's friction modifier additive. It took a day, but the rear end is now smooth as butter once again. I know that there are a couple people running Amsoil gear lube in their differential, but apparantly mine didn't like it too much. Boy was that Motorcraft lube expensive though!!!
 
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