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[PaulyQ]

Hi all,

OK... got a 2.5L v6 with an autobox and now and again the gearbox sort of slams into gear (99% OK most of the time) and then the AutoBox message is displayed on the centre console and then if I need to change down to a low gear manually to accelerate from a junction etc.... After turning off the car and then back on again the problem sods off.

I understand this could be a symptom of the selector switch needing a good old clean... where do I locate it (and what does it look like??), is it easy to take apart and take off the car and refit? A step by step would be nice.

Secondly I am looking for a kind person with Tech2 in my area who would kindly upgrade my autobox ECU to the more recent version to smooth things out in the box.

third... how do I change the oil/filter in the autobox?

That's it.... 3 questions in one!!

Thanks for your info and replies!!

[TheBoy]

Change the fluid as first port of call.  Drop both gearbox sumps, replace filter, refit sumps, refill

Newer software will make box smoother, but will not cure your problem with it going in to limp.

[PaulyQ]

hence the reason for cleaning the selector switch   may as well have a day when I do it all together i.e. oil change then selector switch clean.

[TheBoy]

hence the reason for cleaning the selector switch   may as well have a day when I do it all together i.e. oil change then selector switch clean.

Yup, agreed

[PaulyQ]

so question 2 answered...

I understand this could be a symptom of the selector switch needing a good old clean... where do I locate it (and what does it look like??), is it easy to take apart and take off the car and refit?

Anybody any joy with this one..... thanks!!

[phil21turbo]

Hi all,

OK... got a 2.5L v6 with an autobox and now and again the gearbox sort of slams into gear (99% OK most of the time) and then the AutoBox message is displayed on the centre console and then if I need to change down to a low gear manually to accelerate from a junction etc.... After turning off the car and then back on again the problem sods off.

I understand this could be a symptom of the selector switch needing a good old clean... where do I locate it (and what does it look like??), is it easy to take apart and take off the car and refit? A step by step would be nice.

Secondly I am looking for a kind person with Tech2 in my area who would kindly upgrade my autobox ECU to the more recent version to smooth things out in the box.

third... how do I change the oil/filter in the autobox?

That's it.... 3 questions in one!!

Thanks for your info and replies!!

I've just changed my AR25 for an AR35.  I had the same problem with.  Swapped everything over bar the selector, as my old ar25 had a new selector switch, so stuck this on the ar35.  Now I've still got the same problem.  Although drove car today and it hasn't happenned?

Be interested to read the replies to your problems...

[PaulyQ]

Thanks for your input Phil

[unicus]

I've just changed my selector switch (http://www.omegaowners.com/forum/YaBB.pl?num=1185809108) and my wife had experienced a 'bump' from the gearbox before and after I changed it. I then noticed the reversing lights weren't coming on so I adjusted the switch and it seems to be OK now. Mind you I'm going to change the oil/filter as I'm not convinced that the switch was the cause of the 'bump' and the receipt I've got that says the oil was changed 2 years ago is not convincing (on a detailed list of parts for other work there's one reference to 'replace auto trans fluid' - hmmm did the previous owner get the wool pulled over his eyes?)

BTW where's the best place to get gaskets/filter from? Either online or around Nottingham.