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Topic: Diff noise (Read 895 times) |
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Chieftain
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Mechanically Challenged with a 24V Cosworth
 
Posts: 491
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What sort of noise can be expected from a diif that is suspect and any symptoms?
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Bob
if it ain't broke fix it and it will be
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martin_rowe
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I love YaBB 1G - SP1!
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Re: Diff noise
« Reply #1 on: Mar 6th, 2008, 3:45pm » |
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ANY NOISE IS BAD NOISE.
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Rally Drivers Do It Sideways
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Chieftain
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Mechanically Challenged with a 24V Cosworth
Posts: 491
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Re: Diff noise
« Reply #2 on: Mar 6th, 2008, 4:16pm » |
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I know that!!! but what I am trying to tie down is it the diff, sure it is not bearings but was simply asking for some helpful comments on type of noise thta could be expected. Ie. paying for a diff when it was only the gubins angle dangler at .50p see what I mean 
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Bob
if it ain't broke fix it and it will be
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pete from Hull
Senior Member
Non Scorpio at the moment, but still interested...
Posts: 1365
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Re: Diff noise
« Reply #3 on: Mar 6th, 2008, 5:16pm » |
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I am under the impression from other posts on here that it is very uncommon for the diff to go faulty, Noises usually turn out to be wheel bearing based, not neccesarily easy to identify..... Wheel bearings can be problematic and there are lots of posts and info on the main site if you do a search. I am just wraping up at work to go home so I haven't the time to find them for you, someone else may be along soon.
It definately won't be the gubins angle dangler at .50p cos thes are unbelievably reliable. I have NEVER had to replace one yet.... 
Look on here... http://www.fordscorpio.co.uk/transmission.htm
Hth and hope you get it sorted....
Pete
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Chieftain
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Mechanically Challenged with a 24V Cosworth
Posts: 491
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Re: Diff noise
« Reply #4 on: Mar 6th, 2008, 5:21pm » |
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Thanks Pete sure iti s not the bearings both new sets, and it does not sounds like the other halfs car did when the bearing went. Just a long constant drone thats rises in pitch and falls with the speed. I have mechanics sat or otherwise in the rear trying to pinpoint this, and all say diff, but I know what you mean about other posts saying diff is rare to fail. Just want to be sure before paying out.
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Bob
if it ain't broke fix it and it will be
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gozz
Senior Member
Been around awhile
Posts: 3475
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Re: Diff noise
« Reply #5 on: Mar 6th, 2008, 5:57pm » |
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Chieftain.
These diffs do occasionally suffer from noisy bearings,but the sound is heard more through an open window when passing buildings or fences,and is more of a sighing or hissing sound than the normal drone of a wheel bearing.They go on for years making this noise.
GOZZ.
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Chieftain
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Mechanically Challenged with a 24V Cosworth
Posts: 491
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Re: Diff noise
« Reply #6 on: Mar 6th, 2008, 8:32pm » |
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Gozz thenks for that, as I said I am not 100% it is the diff, the noise is very intense with all windows shut, no vibration though, could the centre bearing be at fault? 
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Bob
if it ain't broke fix it and it will be
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pete from Hull
Senior Member
Non Scorpio at the moment, but still interested...
Posts: 1365
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Re: Diff noise
« Reply #7 on: Mar 6th, 2008, 9:50pm » |
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on Mar 6th, 2008, 5:21pm, Chieftain wrote:| Thanks Pete sure iti s not the bearings both new sets, and it does not sounds like the other halfs car did when the bearing went. Just a long constant drone thats rises in pitch and falls with the speed. I have mechanics sat or otherwise in the rear trying to pinpoint this, and all say diff, but I know what you mean about other posts saying diff is rare to fail. Just want to be sure before paying out. |
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I had the problem with my 2ltr before I got the present one.
A garage fitted a new bearing and it went again within a couple of weeks, I took it to bits and found they had only replaced the race and outer ring, think they couldn't get the inner ring off.
I bought 2 new full sets from motor factors and fitted them myself..... one side began to rumble again after a short period so I took them off again and returned them. They sent them for testing and guess what.... They refunded my money and said they had been faulty.... Thats 3 bearings up to now 
I then fitted genuine replacements from fmd.... problem solved. Funny things these bearings.
5 bearing in a couple of months and they didn't even offer compensation for the faulty ones.... and of course I didn't think to argue about it cos I'm too polite....Mug
hth
Pete
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Chieftain
Full Member
Mechanically Challenged with a 24V Cosworth
Posts: 491
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Re: Diff noise
« Reply #8 on: Mar 6th, 2008, 10:23pm » |
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Pete what price did FMD charge you?
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Bob
if it ain't broke fix it and it will be
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Jonnycab
Senior Member
Former owner of 2.3 Ultima Facelift saloon
Posts: 3900
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Re: Diff noise
« Reply #9 on: Mar 7th, 2008, 2:44am » |
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In my experience, diffs tend to drone when they are worn & the drone gets louder & more intense the faster you go 
Hope this helps
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pete from Hull
Senior Member
Non Scorpio at the moment, but still interested...
Posts: 1365
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Re: Diff noise
« Reply #10 on: Mar 7th, 2008, 6:30am » |
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on Mar 6th, 2008, 10:23pm, Chieftain wrote:| Pete what price did FMD charge you? |
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Cor, can't remember of hand, a long time ago with many many pounds spent since.... a phonecall to fmd will soon get you a price.
On my present car 2.3 I have fitted second user one's.... complete hub assemblies and had no problems. Alot easier to fit too.
hth
Pete
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Chieftain
Full Member
Mechanically Challenged with a 24V Cosworth
Posts: 491
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Re: Diff noise
« Reply #11 on: Mar 7th, 2008, 8:10am » |
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on Mar 7th, 2008, 2:44am, jonnycab wrote:In my experience, diffs tend to drone when they are worn & the drone gets louder & more intense the faster you go
Hope this helps |
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It helps a great deal, that is just the effect that I have
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Bob
if it ain't broke fix it and it will be
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gozz
Senior Member
Been around awhile
Posts: 3475
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Re: Diff noise
« Reply #12 on: Mar 7th, 2008, 11:25pm » |
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If the gears are getting shot the noise is worse on the overun,and this is in need of urgent seeing to ! Were your wheelbearings fitted by someone in the know,ie were they torqued to 200 ft lbs,the clearance is preset and MUST be torqued correctly,I have known mechanics to treat them as twin taper roller front wheel bearings and just nip them up.
GOZZ
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harry.m1byt
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What's YaBB?
Posts: 792
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Re: Diff noise
« Reply #13 on: Mar 8th, 2008, 1:03pm » |
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My experience of ailing diffs is of a droning noise of a frequency which always matches the cars speed, though it can get louder at certain speeds. They can drone on for many thousands of miles.
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mr._floppy
Junior Member
Posts: 100
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Re: Diff noise
« Reply #14 on: Mar 8th, 2008, 2:28pm » |
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Indeed, a slight drone from the diff at certain speeds or overrun doesn't mean it's in imminent danger of failure, they are sturdy units.
I'd advise against the old sawdust trick  but maybe a diff oil additive will reduce the noise a wee bitty.
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Chieftain
Full Member
Mechanically Challenged with a 24V Cosworth
Posts: 491
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Re: Diff noise
« Reply #15 on: Mar 8th, 2008, 3:06pm » |
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on Mar 8th, 2008, 1:03pm, harry.m1byt wrote:| My experience of ailing diffs is of a droning noise of a frequency which always matches the cars speed, though it can get louder at certain speeds. They can drone on for many thousands of miles. |
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Thats sounds as good a descriptions as any, am trying oil additive shortly, Gazz I did the bearings so yes they were torqued up as per correct fig
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Bob
if it ain't broke fix it and it will be
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