Clutch Slipping, Control Valve? replacing the ATF pump Seals -

volkenstein · 12 September 2008, 14:13

Steve,
14 Ft/lbs.

Regards
Sean

Airhead · 13 September 2008, 15:41

Ok just been under car to look at replacing oil/ATF pump seals but noticed a reasonable fluid leak, not sure if its ATF or oil but its coming from where the engine joinds the transmission

HELP!!!!!

Airhead

Bookwus · 13 September 2008, 18:39

Hiya Steve,

A leak showing at that point could be either engine oil or ATF.

You'd have to look more closely (in a worst case scenario - pull the engine) to determine the source. I'd think you could tell the difference between engine oil and ATF (a sniff test or color) if you have enough fluid in the leak to sample.

In any event, either engine oil or ATF inside the bellhousing is not a good thing. That could well be a cause of a slipping clutch.

68autobug · 14 September 2008, 06:09

You have to remember that the clutch plate assembly is located inside the gearbox
sealed inside - [from memory]

and the bellhousing with the torque converter and flexplate have drain holes underneath..
so the clutch can't really be slipping.. in Oil ?? I don't think...??

Maybe the clutch plate has worn too much...

We know they don't normally wear too much...

but we are running out of problems....

If everything checks out OK - Hoses - control valve - etc..

it Could be the clutch plate or even the clutch pressure plate...

but maybe the control valve needs MORE adjustment - as its taking too long to operate the servo..
If You lay under the clutch servo - and have some one operate the gearshifter
and see how far the clutch servo lever moves...
and most importantly- if it moves in ONE complete movement - instantanously - [is correct]
or very slowly -- [a problem ] maybe the control valve adjustment is out...
but that sounds like its out a LONG way...

something else just came to mind... if the points in the gearlever base were staying connected too long...
[Way Too long??]

If the clutch assembly is contaminated with Gear oil ..
I think the only way to check would be to drill a hole under the clutch assembly... 10mm 3/8"
One of the gearboxes i have has 3 10mm holes drilled under the clutch assembly...
so, whether there was a problem years ago

who knows...
but it cannot hurt anything... the holes that is...

cheers

LEE

68autobug · 14 September 2008, 06:14

Well Guys,

this is the hardest one yet... IMHO...

its getting complicated, when We enter the clutch and gearbox,

usually its a simple thing like a hose - seal etc...

Lee

Airhead · 14 September 2008, 15:59

Is it possible that the crankshaft seal is leaking and therefore the clutch is getting contaminated with oil?

Airhead

volkenstein · 15 September 2008, 05:39

Airhead,
No, not engine oil at least. The clutch sits in its own cavity behind the Bellhousing. It is sealed on one said from ATF and the other side from transaxle oil.
When you get the engine out have a look at where/what colour oil residue you have. Rear main leaks should be visible through the holes in the Flex plate. ATF can leak out all over the place. It can run toward the converter or toward the GB side of the bellhousing. The converter will fling it all over the shop.

HTH
Volkenstein

68autobug · 15 September 2008, 06:00

You should be able to tell what sort of oil it is...

engine oil when a drop is wiped with Your finger
it will have dirt at the bottom of it...

ATF has its own smell...

Hypoid gearbox oil is very smelly...
but usually clean

I suppose this all depends on how dirty the bottom of the gearbox engine is...
mine is all painted and very clean...

but I do get a bit of seepage...

Sean,

can gearbox oil get onto the clutch via that rare seal... 001 311 113 mainshaft oil seal [evw]

Lee

volkenstein · 15 September 2008, 06:59

Lee,
The possibility certainly exists, but in an A-S I'd reckon it would have to be an absolutley whipped transmission or super high mileage one.

Regards
Sean

68autobug · 15 September 2008, 08:11

Sean,

Have you ever replaced that seal
I haven't really heard of anyone having a wet clutch plate due to Gear oil etc..

LEE

volkenstein · 15 September 2008, 08:26

Lee,
No, and I wouldn't want to except if totally necessary. The last time the subject came up, I'd found a post by a guy who found someone had used sealer on the OD and when he attempted to take it out, the inside was trashed but the outer section stuck to the seal bore. An unhappy experience!

Regards
Sean

68autobug · 15 September 2008, 09:35

Well
I hope I never have to either...
the process of replacing the seal looked too hard for Me so luckily
I never attacked the original seal... lol

thats good news...

Lee