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[bigboydal]

Hi all,

I've had my trusty Omega for a few years now. Recently changed the auto box oil and filter but the kicdown just doesn't seem the same now. Basically, the kick down seems to work fine one minute but then refuses to drop whatsoever the next. It normally refuses to drop at mid range speeds, eg 50ish. Very strange as it pulls off from a stop like a missile changing gears lovely but often refuses to kick down when joining motorways etc

I used to love the kick down on this motor! I've re-checked auto box oil level with engine running etc. It did take a bit more and it does seem to of improved the frequency of the kick down refusing to kick down but it still randomly plays up. Obviously as the oil is the only thing I have changed it would indicate that but Ive used DX 4 as required. Any ideas out there for me?

[4x4]

Ahh thats an easy fix......




Your 2 cylinders short of a proper engine 

[bigboydal]

many thanks for your words of wisdom but there has to be another way 

Ive recently changed the cam sensor with a genuine GM part so that shouldn't be causing my grief

[Temetsy]

Ahh thats an easy fix......




Your 2 cylinders short of a proper engine

Got to love the different attitude you have toward six pots there compared to general oppinion to those lumps here in finland   

[SIR Philbutt]

Use the big stick in front of the stereo - or even the button on the top of it

Thats what I do when thew computers says NO

[bigboydal]

but the computer used to say YES! that's the problem.

[flyer 0712]

I believe that I am correct when I say...I have seen other members on here with autos .and after changing the filter and fluid they too have  had problems with gear changing....dont know the answer but that is why i have never been tempted to change mine just in case the same thing happens....as mine is ok  that old proverb comes to mind....if its ok why muck about with it.

[bigboydal]

any helpful replies would be greatly appreciated

[Steve B]

any helpful replies would be greatly appreciated

I Wonder if it would be any help having a Gearbox software update 

[Webby the Bear]

The fact is that changing the auto fluid can mess up a gearbox if it hasn't ever been changed. The old fluid after twelve years will be a lot thicker as it will be made up of tiny metal shards where the gears slip and after replacing it with new thinner fluid has caused a problem.

I don't know what others on here think but I'd be tempted to add some non slip additive to overcome this.

[05omegav6]

many thanks for your words of wisdom but there has to be another way 

Ive recently changed the cam sensor with a genuine GM part so that shouldn't be causing my grief

Where did you get the cam sensor from

[TheBoy]

I'd be inclined to get it on diags, and check engine and gearbox for codes, and check the kickdown switch is working reliably.

[Webby the Bear]

I'd be inclined to get it on diags, and check engine and gearbox for codes, and check the kickdown switch is working reliably.

Out of interest how would one go about such a task, TB?

[TheBoy]

Ahh thats an easy fix......




Your 2 cylinders short of a proper engine

Got to love the different attitude you have toward six pots there compared to general oppinion to those lumps here in finland   

Its a big ask to get 1.7t of lump moving from such a small engine, esp in auto form.

[TheBoy]

I'd be inclined to get it on diags, and check engine and gearbox for codes, and check the kickdown switch is working reliably.

Out of interest how would one go about such a task, TB?

Live data

[Webby the Bear]

I'd be inclined to get it on diags, and check engine and gearbox for codes, and check the kickdown switch is working reliably.

Out of interest how would one go about such a task, TB?

Live data

That only available on TechII?

[TheBoy]

I'd be inclined to get it on diags, and check engine and gearbox for codes, and check the kickdown switch is working reliably.

Out of interest how would one go about such a task, TB?

Live data

That only available on TechII?

Pretty certain its in the TCM, so anything capable of reading live data in there

[Webby the Bear]

I'd be inclined to get it on diags, and check engine and gearbox for codes, and check the kickdown switch is working reliably.

Out of interest how would one go about such a task, TB?

Live data

That only available on TechII?

Pretty certain its in the TCM, so anything capable of reading live data in there

May have to get my new Autel on it as that's got TCM reading capabilities 

[bigboydal]

thanks for your replies people. The cam sensor was from a main dealer costing £85. Before this Omega I had the earlier model on a T plate, that one did have a physical kick down switch under the pedal where as this one just has a pedal stopper, its all electronic so that idea's out the window. An earlier post suggests the new clean oil is the problem as the old oil would of had metal filings in making the oil thicker. It all goes through the filter and what isn't caught there would be caught by the sump magnet right?- so not so sure on that one.

[bigboydal]

 .

[bigboydal]

thanks for your replies people. The cam sensor was from a main dealer costing £85. Before this Omega I had the earlier model on a T plate, that one did have a physical kick down switch under the pedal where as this one just has a pedal stopper, its all electronic so that idea's out the window. An earlier post suggests the new clean oil is the problem as the old oil would of had metal filings in making the oil thicker. It all goes through the filter and what isn't caught there would be caught by the sump magnet right?- so not so sure on that one.

[tigers_gonads]

thanks for your replies people. The cam sensor was from a main dealer costing £85. Before this Omega I had the earlier model on a T plate, that one did have a physical kick down switch under the pedal where as this one just has a pedal stopper, its all electronic so that idea's out the window. An earlier post suggests the new clean oil is the problem as the old oil would of had metal filings in making the oil thicker. It all goes through the filter and what isn't caught there would be caught by the sump magnet right?- so not so sure on that one.

As far as I know, ALL auto boxes have a mechanical kick down switch 
That would be my first place to look 

[Webby the Bear]

thanks for your replies people. The cam sensor was from a main dealer costing £85. Before this Omega I had the earlier model on a T plate, that one did have a physical kick down switch under the pedal where as this one just has a pedal stopper, its all electronic so that idea's out the window. An earlier post suggests the new clean oil is the problem as the old oil would of had metal filings in making the oil thicker. It all goes through the filter and what isn't caught there would be caught by the sump magnet right?- so not so sure on that one.

Last article on this page...

http://www.ericthecarguy.com/faq/solving-transmission-problems?start=5

[Kevin Wood]

Drive By Wire cars don't have a kickdown switch (that I can find). I believe the engine load signal from the CAN bus is used instead. Would be worth checking both the engine and gearbox ECUs for codes and, failing that, live data, to ensure 100% engine load is being reported at full throttle.

There may be a kickdown flag in the live data on the autobox ECU - I can't remember. It's not triggered by a physical switch that I can see, though.

[05omegav6]

TPS perhaps on mine, kickdown seems to be just past what feels like full throttle...

It does lift its skirt up and get a wriggle on cleanly when asked though (I had promised not to say, but a fellow 3.2ist seemed quite impressed all in all... just don't tell Tunnie )

[tigers_gonads]

TPS perhaps on mine, kickdown seems to be just past what feels like full throttle...
It does lift its skirt up and get a wriggle on cleanly when asked though (I had promised not to say, but a fellow 3.2ist seemed quite impressed all in all... just don't tell Tunnie )

Same on my 3.2 auto
Definetly get a firm clunk when pushed to the limit.
Also check that the carpet isn't gettin in the way