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Author Topic: Autobox delayed change-up when engine cold  (Read 14192 times)

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Auto Addict

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Re: Autobox delayed change-up when engine cold
« Reply #30 on: 13 August 2006, 15:35:50 »
Quote
Just had a thought AA.....

Does your sports mode work ok?......coz i think gearbox just goes into sports mode for a short while when cold (ie holding the gears and letting it rev higher)

Yes [smiley=thumbsup.gif]
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Marks DTM Calib

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Re: Autobox delayed change-up when engine cold
« Reply #31 on: 13 August 2006, 16:46:53 »
Been doing some digging on this....there are quite a few signals between the autobox and ECU....one of which might be a temp signal (there is certainly RPM and retard - ground this signal if converting to manual) plus a couple of others.

Need to get the old AVO on the signals and monitor them during warm up to see what they do.

By the way, mine does NOT hold first when cold......
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Salty

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Re: Autobox delayed change-up when engine cold
« Reply #32 on: 13 August 2006, 16:57:18 »
When cold and setting off down the street mine holds first up to about 3to 3.5 thousand rpm, then it changes up. within a minute I reach a junction and stop. when I set off again it changes normally. My old senny did exactly the same.
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B52

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Re: Autobox delayed change-up when engine cold
« Reply #33 on: 13 August 2006, 19:04:53 »
Sometimes mine delays 1st to 2nd change (until 25mph) if Im moving off on even a slight uphill - thats quite annoying too. Garage told me its responding to the accelerator sensor movement.
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B52

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Re: Autobox delayed change-up when engine cold
« Reply #34 on: 13 August 2006, 19:05:50 »
Hot or cold too!
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Paul M

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Re: Autobox delayed change-up when engine cold
« Reply #35 on: 14 August 2006, 23:24:46 »
Thank opps both my cars are manual... I'll decide if I want to do 6000 RPM in first or 800 RPM in 6th thanks  ;D
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Hillper

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Re: Autobox delayed change-up when engine cold
« Reply #36 on: 15 August 2006, 00:09:30 »
Same goes for autobox limp home mode.

I'll decide if I want to wreck my gearbox by driving it normally through all gears.
I don't want to be forced to creep along in first at 1500 rpm max.
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Markjay

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Re: Autobox delayed change-up when engine cold
« Reply #37 on: 16 August 2006, 14:34:01 »
On my 2.6 FBW, I can by-pass this feature by easing-off the pedal slightly just when the transmission seems insisting on not shifting-up, then pressing the accelerator again slowly and the box shifts-up as soon as I re-apply the pressure on the pedal even at low rpm.

This works for all gears and it is how I drive the car until it warms up. The 'downside' is that the this rsults in car being driven very mildly and you can't drive the car hard if using this technique, but then again you probably wouldn’t want to drive it hard anyway with a cold engine...

I did not try this on my previous 2.5, so I don't know if this possible only on the FBW or will it work also with the old-style throttle engines - can someone check?


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