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10th April 2018, 14:36 | #1 |
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Auto gearbox
How many gears are in a automatic gearbox on a CDT, The reason I ask is when I am towing in Drive it drop the revs when it reaches around 52. This cause the car to struggle to pull properly and blow black smoke, if I change down to 4 the revs come back up and it tows lovely leading me to think it is a 5 speed auto box.
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10th April 2018, 14:46 | #2 | |
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It is indeed a 5 speed box
Quote:
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10th April 2018, 14:50 | #3 |
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But it should change down to 4th if you push down gently on the accelerator or lower if you push harder. I sometimes manually change down when on the motorway rather than kick down to stop the engine revving too much (mine's a 2.5 KV6 though).
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10th April 2018, 15:57 | #4 |
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Un-intuitively put the box in sport mode.
This move the rev band up the scale - i.e. gear change ups will occur later at higher revs.
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10th April 2018, 16:06 | #5 |
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Go quicker is the simple answer. They are much happier towing at 60mph (even better if you do 60mph according to a sat nav).
They are very reluctant to kick down and will struggle until it has to kick down due to speed. So either use 4th or up the speed.
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10th April 2018, 16:53 | #6 |
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I was under the impression you can't/shouldn't tow an automatic
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10th April 2018, 16:56 | #7 |
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10th April 2018, 16:57 | #8 |
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10th April 2018, 17:07 | #9 |
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You can tow an automatic but you have to limit the speed and keep distance as short as possible.
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10th April 2018, 17:14 | #10 |
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Towing an auto
SFAIK a suspended tow is OK ie the driven wheels off the ground and not turning. Anything else and there are speed and distance limits and I had one car where the handbook mentioned adding extra ATF fluid to the box. So, a flat loader or a suspended tow is the best way forward. What does the car handbook say?
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