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    What gearbox can I use in my 2007 Holden Calais?

    Holden Holden Advice Holden Calais Holden Calais Advice Holden Calais 2007

    I need to replace the transmission on my 2007 Holden Calais, do I have options as to what will work with my car or am I stuck with the original five-speed only?

    Answered by CarsGuide
    29 June 2021
    David Morley

    The five-speed automatic in your Calais is a bit of an odd one, Mark, as it was only used for a handful of years and only in the high-feature 3.6-litre V6. Holden switched the car to a six-speed automatic in September 2009, so technically, that would be possible to fit to your car. As with a lot of these things, however, it’s not as simple as finding a gearbox and bolting it in. Modern engineering dictates that the five-speed and six-speed transmissions, while physically similar, may have featured bigger differences in terms of the information they fed to the car’s on-board computer and the program within that computer that, in turn, told the gearbox what to do next.

    At the very least, you’d need the electronic transmission-control module to make the six-speed work and possibly some changes to sensors and wiring. Even then, you might find that your speedometer needs recalibration. Unlike the good old days when the transmission was simply a set of gears, a modern transmission these days is a much more sophisticated piece of equipment and does a much more complex job.

    Disclaimer: You acknowledge and agree that all answers are provided as a general guide only and should not be relied upon as bespoke advice. Carsguide is not liable for the accuracy of any information provided in the answers.
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