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10-10-2012, 10:41 AM | #1 |
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Intermittent slow DCT shifting?
At a track day this past weekend, I noticed that my DCT was shifting flawlessly during the first few laps, had a slight delay during the middle lap or two (on upshifts), and then acted perfectly fine for the final couple laps. has anyone ever experienced this?
i had the traction control off, and the shifting intensity was set all the way up to 6. |
10-10-2012, 11:08 AM | #2 |
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Got that only once on a very hot day. I guess it is the tranny overheating. Other folks that run in hotter climates have had the issue.
a little and you'll find some more info on the topic. |
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10-10-2012, 02:04 PM | #3 |
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I've had overheating problems every time I went to the track with temperatures in the mid-90s and up. I've had both engine oil overheating and DCT overheating issues.
Symptoms of the DCT overheating are: * slower than usual shifting * not shifting at all * shifting by itself to higher gears * loss of lower gears By the time you get the above symptoms (except slow shifting), you would typically get an overheating warning message. |
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10-11-2012, 07:37 AM | #4 |
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Unless you've been running something longer than a 20 minute DE session your DCT shouldn't overheat. How many shifts are you doing per lap? I've never had a heat issue in 100 degree temps but you do have to manage the car. You can't keep the tach pinned at the redline the entire time.
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10-11-2012, 10:18 PM | #5 | |
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All should be ok. Just pull up for a few laps or wait till next session. When it gets really hot you get the warning light in advance as was mentioned.
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10-12-2012, 07:12 AM | #6 | |
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I could down shift into 2nd later into the turn but not sure if I'm comfortable with that. But I haven't had a ton of seat time in my E90 to really build a lot of comfort. I am comfortable mid-corner shifting with my 6SP 330 because I'm in control.
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10-12-2012, 01:44 PM | #7 | |
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I checked my videos from a few weeks back in mid-90s temperature, it took 8 laps (~13min including 1 warm-up lap) for the car to overheat at which point I pulled back. And this was with upgraded cooling. Oil temperature needle was almost touching the 300F and I got warning that only higher gears were available. If nobody else is having this problem than my only conclusion is that something is wrong with my car... |
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10-12-2012, 03:47 PM | #8 | |
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Would going from S6 to S4 allow your DCT to run cooler?
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10-12-2012, 04:37 PM | #9 |
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I'm not that good yet to run without DSC in S6... I run MDM on (euro) in S4 mode already.
Yeah, that's the conclusion I'm converging to... something is wrong and I need to find what it is. |
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10-12-2012, 07:51 PM | #10 |
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MDM sure ain't helping your brakes. I'd run with DSC off at the track and M Mode on. Might be some mysterious thing that helps with the overheating.
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