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[JONNYWAKEY]

is the gearbox ecu the same thing as the Transmission Control Module located in the drivers side door pillar / footwell ?

If so i am sending this off for test

[Markjay]

is the gearbox ecu the same thing as the Transmission Control Module located in the drivers side door pillar / footwell ?

If so i am sending this off for test

Yes it is, but they rarely go wrong....

[JONNYWAKEY]

According to Vauxhall dealer the P0700 Code and P1700 code only point to the gearbox ECU.

I can get this tested for £35 at www.Autotekelectronics.co.uk

Think it's worth paying for.

When car is running okay the gearbox changes really well and smooth, if it was a gearbox mechanical failure it would be contstant where as an electrical fault is going to be intermittant.

[TheBoy]

See Taxi Driver's response earlier - do not rule out cam sensor!  I think Auto Addict had similar problem as well on his 2.2

[Markjay]

According to Vauxhall dealer the P0700 Code and P1700 code only point to the gearbox ECU.

I can get this tested for £35 at www.Autotekelectronics.co.uk

Think it's worth paying for.

When car is running okay the gearbox changes really well and smooth, if it was a gearbox mechanical failure it would be contstant where as an electrical fault is going to be intermittant.

Apparently these are for Simtec management system codes:

P1700 - Transmission control module (TCM) - service request signal, probable cause: ECM, TCM
P0700 - Transmission control module (TCM) - malfunction, probable cause: wiring, ECM, PCM, TCM

Just keep in mind that the error codes can be misleading, it does not always point to the source of the problem but rather to the symptom!

[Markjay]

Have you done the obvious - change ATF and clean/change the filter? This seem to resolve 99% of auto box problems...

Also check all wiring and I believe there is also a sensor on the autobox that needs checking...

[Markjay]

Did the dealer upgarde the transmission ECU firmware? did the problem with the autobox start before they did this?

[JONNYWAKEY]

dealer upgraded both firmware, problem was there b4 though, dealer couldnt clear eml for some reason.

Which sensor requires checking on the Autobox ?  I had the oil pressure sensor changed last year and had oil and filter changed last month.

Its got to be electrical to do with ecu! I think.

[Taxi_Driver]

According to Vauxhall dealer the P0700 Code and P1700 code only point to the gearbox ECU.

I can get this tested for £35 at www.Autotekelectronics.co.uk

Think it's worth paying for.

When car is running okay the gearbox changes really well and smooth, if it was a gearbox mechanical failure it would be contstant where as an electrical fault is going to be intermittant.

It points to the g/b ecu is complaining of something......these g/b codes need to read to find out what it is......if they are CAN bus errors theres nothing wrong with the g/b......theres something else wrong.

I just look up the codes i was getting from the g/b ecu P1781 and P0727 which are CAN bus errors but it was in my case the cam sensor causing it.
But in your case it may be complaining of another sensor.

Im still wondering why vx dealer said they couldnt read the g/b ecu codes.....I still reckon a trip to see TheBoy (Jaime) and let him use his tech2 on it to see if he can read the g/b ecu would be worthwhile