Gearbox & Diff oils

Gearbox & Diff oils

Author
Discussion

mel-S3

Original Poster:

176 posts

263 months

Wednesday 11th September 2002
quotequote all
Hi everybody,

Just bought a gleaming red S3. Decided to do a service and check on it this weekend, but i am having a few problems figuring out what oil to put in the Diff. The original S3 handbook recommends L.S.D. Oil. But as far as i can make out my car hasn't got a limited slip diff. No other oil is recommended. Will normal gear oil be OK?

Also, while I'm talking oil, i noticed a previously posted message stating that A.T.F. oil is correct for the manual gearbox in the S3. This can't be right can it?

Any advise on these matters will be greatly received.

mhibbins

14,055 posts

280 months

Wednesday 11th September 2002
quotequote all
quote:
Also, while I'm talking oil, i noticed a previously posted message stating that A.T.F. oil is correct for the manual gearbox in the S3. This can't be right can it?
Apparently this is right, red atf fluid is the stuff to have according to the guy that rebuilt my gearbox recently and chaps in the know here on PH. Let's hope so anyway as that's what I've filled mine with

Don't know about your diff though.

Mark

PS. Actually, I guess you'll need to check what's in there before you add anything else. Dip something in the gearbox oils and see if it's red - don't drop anything in the gearbox though.

>> Edited by mhibbins on Wednesday 11th September 14:54

tonystiny

122 posts

274 months

Wednesday 11th September 2002
quotequote all
I also have an S3, mine has got a limited slip diff, great for doughnuts . I thought they were standard on all S3's? Has anyone found a drain plug on the diff yet?

Tony

mhibbins

14,055 posts

280 months

Wednesday 11th September 2002
quotequote all
quote:
I also have an S3, mine has got a limited slip diff, great for doughnuts . I thought they were standard on all S3's?
I wish that was the case but sadly it isn't.

Mark

tonystiny

122 posts

274 months

Wednesday 11th September 2002
quotequote all
Not 100% sure of this, but didn't the XR4x4 sierra have limited slip as standard? If so, I bets there's loads sitting around in scrap yards.Maybe someone could confirm this?

Tony

JSG

2,238 posts

284 months

Wednesday 11th September 2002
quotequote all
quote:

I also have an S3, mine has got a limited slip diff, great for doughnuts . I thought they were standard on all S3's? Has anyone found a drain plug on the diff yet?

Tony


They were standard on the S3C according to the brochure.

Cheers,
John.

shpub

8,507 posts

273 months

Thursday 12th September 2002
quotequote all
quote:

Not 100% sure of this, but didn't the XR4x4 sierra have limited slip as standard? If so, I bets there's loads sitting around in scrap yards.Maybe someone could confirm this?

Tony



I can confirm there are a load of Sierras sitting in scrapyards but as is described in the bible, whether they have the exact diff with the right size propshaft flange or the one that was fitted to a German Taunus version of the Sierra that was also used on the V8S cars is another matter.

Anyone who wants to go down this route is strongly advised to chcek and double chcek all the dimensions before buying a diff that doesn't fit.

Steve
www.tvrbooks.co.uk

>> Edited by shpub on Thursday 12th September 08:58

Paceracing

729 posts

267 months

Thursday 12th September 2002
quotequote all
quote:
Hi everybody,

Just bought a gleaming red S3. Decided to do a service and check on it this weekend, but i am having a few problems figuring out what oil to put in the Diff. The original S3 handbook recommends L.S.D. Oil. But as far as i can make out my car hasn't got a limited slip diff. No other oil is recommended. Will normal gear oil be OK?

Also, while I'm talking oil, i noticed a previously posted message stating that A.T.F. oil is correct for the manual gearbox in the S3. This can't be right can it?

Any advise on these matters will be greatly received.



The Diff uses a very thick hypoid gear oil. You should be able to purchase it from Halfords. Read the label on the bottle to make sure that it is suitable for differentials. The Diff plug is in the rear of the diff casing, approx halfway up it. It is a hex-type key.
The gearbox oil is ATF fluid. (Automatic Transmission Fluid). It is very thin compared to the diff oil, and is usually a pinkish red in colour. I purchase all of my oils from my local Ford dealership. (Except engine oil of course!!).

Jas.

scruff400

3,757 posts

262 months

Thursday 12th September 2002
quotequote all
quote:
Anyone who wants to go down this route is strongly advised to chcek and double chcek all the dimensions before buying a diff that doesn't fit.

Steve
www.tvrbooks.co.uk



Why would you want to do that Steve?

mel-S3

Original Poster:

176 posts

263 months

Thursday 12th September 2002
quotequote all
All this information, thank you everybody.

I have now checked my gearbox and yes it has A.T.F. oil in. I'm quite surprised!!! I think I'll get some Ford stuff, as suggested by Jas. I must pop in to the dealership for some other bits and pieces anyway.

Melvin

shpub

8,507 posts

273 months

Thursday 12th September 2002
quotequote all
quote:

quote:
Anyone who wants to go down this route is strongly advised to chcek and double chcek all the dimensions before buying a diff that doesn't fit.

Steve
www.tvrbooks.co.uk



Because I get fed up with emails that start "You said that this was based on a Ford Courgar RSGTI Turbo made in Feb 1998 and I bought one and it does not fit. You owe me £500." for a start.

The diffs come in 7 and 7.5 inch diameter flanges. One fits the other doesn't. Enough said I think.

Steve

Why would you want to do that Steve?

shpub

8,507 posts

273 months

Thursday 12th September 2002
quotequote all
quote:

quote:
Anyone who wants to go down this route is strongly advised to chcek and double chcek all the dimensions before buying a diff that doesn't fit.

Steve
www.tvrbooks.co.uk



Because I get fed up with emails that start "You said that this was based on a Ford Courgar RSGTI Turbo made in Feb 1998 and I bought one and it does not fit. You owe me £500." for a start.

The diffs come in 7 and 7.5 inch diameter flanges. One fits the other doesn't. Enough said I think.

Steve

Why would you want to do that Steve?

tonystiny

122 posts

274 months

Thursday 12th September 2002
quotequote all
Just one last question.
I've had a good nose round mine and can see the plug to top the oil up.
Is there a drain plug on the diff?

Justin S

3,642 posts

262 months

Thursday 12th September 2002
quotequote all
don't think that ford did drain plugs.You'll have to buy a drain system from your local motorist shop at about a tenner and drain it out of the fill hole.
One other thing.My type 9 ford box in the westie,I was advised by the engine builder to use a 'pink synthetic'oil in it.I guess this is the oil we are talking about for boxes.If so,it is available under the Comma banner from most outlets and is the same as Silkolene oil (made by them) only cheaper.

tonystiny

122 posts

274 months

Friday 13th September 2002
quotequote all
Quote: don't think that ford did drain plugs.You'll have to buy a drain system from your local motorist shop at about a tenner and drain it out of the fill hole.

Ok, thanks.
Sounds like the bean counters talked the engineers into cutting corners again. (We save 3p if we delete this!)
Not so sure about the Comma / silkolene being the same though. That's not to say the comma product is inferior.

Tony.

Scruff400

3,757 posts

262 months

Friday 13th September 2002
quotequote all
buying a diff that doesn't fit.
Why would you want to do that Steve?
One fits the other doesn't. Enough said I think.

Sorry if I touched a nerve. But shirley if the blokes competant enough to fiddle with his Diff, he would know to get the righ...
Oh, ...OK!

Sorry.


mel-S3

Original Poster:

176 posts

263 months

Wednesday 2nd October 2002
quotequote all
Hello all,

I would like to mention that i have just changed the oil in my Gearbox. I bought Ford MT 75 oil from an agent. The parts man said although the Ford stuff is reddish in colour, it definitely is not A.T.F oil, and would not recommend this oil for the MT 75 Gearbox, as it is far too thin.

Hope this helps to clear up this old debate.

Melvin

dern

14,055 posts

280 months

Wednesday 2nd October 2002
quotequote all
Erm, are you aware that your gearbox is a type-n(9) and not (probably) an mt75?

Mark

Paceracing

729 posts

267 months

Wednesday 2nd October 2002
quotequote all
Hmmmm gotta agree!
The type 9 is almost certainly the gearbox you have in your car and not the MTX 75.
Ford recommend ATF fluid for the type 9 gearbox, as do a lot of gearbox specialists.

Jas.

P.S. I first replaced my gearbox oil 6 years ago. The oil I took out was red in colour, and the Ford ATF fluid I put back was also red. That was 6 years ago, with dozens of trackdays and 3 sprint championships in the interim with no problems at all.

P.P.S. ATF oil is very thin, (similar to Mobil 1).

>> Edited by Paceracing on Wednesday 2nd October 18:18

LeeBee

773 posts

285 months

Wednesday 2nd October 2002
quotequote all
Isn't the MTX75 the front wheel drive version of the MT75? that would be an interesting mod!

Cheers

LeeBee