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Author Topic: EP90 Diff Oil  (Read 3217 times)

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addy

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EP90 Diff Oil
« on: 15 March 2022, 14:59:12 »
Sorry to bother everyone. The wifes car has developed a noise in the back, that seems to be similar to how some old roof racks sounded when driving, similar to a Droning noise, that starts around 30mph and gets louder as you increase speed.  I have swapped known good tyres off mine, onto the back to eliminate tyre noise.

I have ordered two bearing kits, just incase, but was going to check fluid level in diff first, but wandered if this is the stuff I need to top it up?

https://www.ebay.co.uk/itm/124794702903?_trkparms=amclksrc%3DITM%26aid%3D1110006%26algo%3DHOMESPLICE.SIM%26ao%3D1%26asc%3D20200818143230%26meid%3D1d5d748e483d4f3abdb79228a7b245fd%26pid%3D101224%26rk%3D2%26rkt%3D5%26sd%3D133420432934%26itm%3D124794702903%26pmt%3D0%26noa%3D1%26pg%3D2047675%26algv%3DDefaultOrganicWeb&_trksid=p2047675.c101224.m-1

Or is this better?
https://www.ebay.co.uk/itm/114264950943

Thanks for in advance for any help or suggestions.

Addy
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Drives 1995 2.0ltr CD Estate.  2002 2.6 CD saloon

STEMO

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Re: EP90 Diff Oil
« Reply #1 on: 15 March 2022, 15:23:53 »
Swap your rear end for Tiggers rear end and report back.  :y
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Nick W

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Re: EP90 Diff Oil
« Reply #2 on: 15 March 2022, 15:25:09 »
They're both just oil.


buy the Westway one, because it comes in a prettier bottle.
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addy

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Re: EP90 Diff Oil
« Reply #3 on: 15 March 2022, 15:45:31 »
Hi stemo

I don't think he would want my rear end. According to the misses. ;D

Thanks Nick W. I will go on your recommendation. Nothing like a pretty bottle sitting in the workshop. :D
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Nick W

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Re: EP90 Diff Oil
« Reply #4 on: 15 March 2022, 15:55:27 »
Quote from: addy on 15 March 2022, 15:45:31
Hi stemo

I don't think he would want my rear end. According to the misses. ;D

Thanks Nick W. I will go on your recommendation. Nothing like a pretty bottle sitting in the workshop. :D


Yes, it's what makes it worth 48% more :y
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dave the builder

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Re: EP90 Diff Oil
« Reply #5 on: 15 March 2022, 17:00:13 »
But the bottle won't be "sitting in the workshop" because the diff is 1+ ltr from empty
or if it's not empty  ,Id be syphoning what is left in and replacing it anyway
so the fancy bottle will be in landfill
2 bottles of the cheaper stuff might have been better IMO
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Enceladus

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Re: EP90 Diff Oil
« Reply #6 on: 17 March 2022, 00:54:26 »
Or try a nice classic metal can.

Probably none of the containers will have a long enough spout to get an angle to pour the oil into the filler hole.

A drone from the rear that varies with road speed is almost certainly a worn differential as opposed to the wheel bearings. A problem that afflicts all RWD Opels and Vauxhalls.
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robson

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Re: EP90 Diff Oil
« Reply #7 on: 17 March 2022, 08:36:57 »
Get yourself a turkey baster Useful for many jobs around the car and house. :y
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addy

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Re: EP90 Diff Oil
« Reply #8 on: 17 March 2022, 09:12:21 »
If it turns out that the diff, is knackered. Can I fit a diff from any other model? The car is a 1995 2ltr 16V estate petrol Automatic. Would I be able to say fit a diff from a later 2.2, 2.5, 2.6 or even from a 3 and 3.2 ltr. I would imaging the fixing points are the same, between the estates and saloons?

Thanks for all the help.
Addy
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Fraggles Rock

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Re: EP90 Diff Oil
« Reply #9 on: 17 March 2022, 09:20:08 »
Ideally you want a diff from another four cylinder with the same gearbox as the ratios vary.

One from a 3.2 might make the car undrivable as the change in ratio will affect the road speed in any gear for a given rpm. The 2.0,whilst adequate, isn't blessed with power to begin with.
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addy

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Re: EP90 Diff Oil
« Reply #10 on: 17 March 2022, 09:43:51 »
Hi

Would this diff fit, as it off a 2.2 four cylinder Auto?

https://www.ebay.co.uk/itm/284374916884?hash=item423610df14:g:B2kAAOSwuy9g8uBS

Thanks for the help
Addy
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Fraggles Rock

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Re: EP90 Diff Oil
« Reply #11 on: 17 March 2022, 10:12:21 »
Fitting and working are two very different things, but yes it will physically fit.

Near as I can tell your car has a 3.90 ratio... That 2.2 is 4.22 which would make it lively but horrible to drive much over 50.

One from a 3.2 or later 3.0 should be suitable as they're also 3.90
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Enceladus

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Re: EP90 Diff Oil
« Reply #12 on: 17 March 2022, 16:10:26 »
Haynes says that all 2.0 models, manual and automatic, use 3.90:1 diffs.
The 2.2 16v use 3.9:1 for manual and 4.22:1 for auto.

There should be a tag plate on your existing diff. There is a two character type code at the top right. The lower line on the plate states the ratio, in your case "39 : 10=3.90". At this age the tag plates are often lost.
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addy

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Re: EP90 Diff Oil
« Reply #13 on: 17 March 2022, 16:16:56 »
Thanks for the info. The plate has gone from the diff. Will keep looking for a diff, just incase the oil change doesn't help the one on the car.
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dave the builder

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Re: EP90 Diff Oil
« Reply #14 on: 17 March 2022, 16:22:47 »
In 22+ years of Carlton and Omega ownership I've found syphoning all remaining oil from the diff and replacing with new ,then repeating that 2K later (effectively flushing out the gunge) resolved any diff noise .
as long as you don't have a bad leak  :-\
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