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      03-28-2009, 09:04 PM   #1
M3V8Driver
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Extremely Frustrated w/ DCT Performance on Track!

I'm not sure if this was/is covered in another thread, but I'm too PO'd to search. Today I was at BeaveRun's "North Track", which is essentially two straights connected by an autocross at one end and a hairpin at the other. Anyway, needless to say, I am carrying some pretty good speed at the end of either straight, and need to brake hard and downshift together before turning in for the apex of the turn. The !@#$%^&* thing wouldn't downshift! It completely ignored my command. What's even worse is that mid turn (in high gear), sometimes it decided it was time to downshift, so it would go from 5th to 3rd, like I wanted it to before the turn-in! WTF? I've driven full automatics that performed better. Does this behavior sound normal, or does it sound like something is wrong? The car has not had the recall reprogramming yet (next Friday), but did have it's 1200 mile service. Also, the DCT takes a split second everytime I shift (up or down). I seem to recall it being more instantaneous prior to the 1200 mile service. Anybody esle experience this? Just wondering if it's normal, or if it really is behaving differently.

FYI, I was in "M" mode, which for me consists of Power on, Full stiff EDC, no DSC, and shift program #6. Conditions = low 60's (F), partly sunny, dry track.
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      03-28-2009, 09:20 PM   #2
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Do you know if you have the most recent DCT update?
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      03-28-2009, 09:26 PM   #3
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Quote:
Originally Posted by M3V8Driver View Post
The car has not had the recall reprogramming yet
This is why!!! Hurry and birng your car in for the recall. It will fix those problems.
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      03-28-2009, 09:47 PM   #4
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i was at the track all day today and ran completely smooth.
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      03-28-2009, 09:48 PM   #5
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Quote:
Originally Posted by tabolau View Post
This is why!!! Hurry and birng your car in for the recall. It will fix those problems.
According to the recall letter I received, the reprogramming is to fix engine stalling upon rapid deceleration in automatic (D) mode. It doesn't say anything about in manual mode. Are you sure my problem is still addressed though?
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      03-28-2009, 09:54 PM   #6
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The update takes care of the delay in shifting. There is a noticeable difference.
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      03-28-2009, 09:55 PM   #7
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According to previous threads, yes this has been discussed many times, it fixed people's issues with downshifting while hard braking.

Try search and you'll find the thread.
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      03-28-2009, 10:01 PM   #8
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Quote:
Originally Posted by M3V8Driver View Post
According to the recall letter I received, the reprogramming is to fix engine stalling upon rapid deceleration in automatic (D) mode. It doesn't say anything about in manual mode. Are you sure my problem is still addressed though?
The update issued last fall also fixes the downshift refusal under threshold braking issue. You can search here for some threads on it. Post update, track performance is much improved.
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      03-28-2009, 10:02 PM   #9
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Quote:
Originally Posted by FifthStreetz View Post
The update takes care of the delay in shifting. There is a noticeable difference.
He said split second delay lol. Maybe he thinks M stands for Miracles.
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      03-28-2009, 10:12 PM   #10
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DON'T GET THE UPDATE, YET!!!!!!

Current update will cure the problems you described, but you'll end up with the dreaded "lag" in normal driving. I suspect the newest update will be available very shortly. Wait for that, then bring your car in.
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      03-29-2009, 02:35 AM   #11
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+1 on the update. It's been reported that the newest update converts your DCT into a 6MT, which has been proven to fix the incorrect gear selection and lag problem
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      03-29-2009, 03:12 AM   #12
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Quote:
Originally Posted by Blake View Post
i was at the track all day today and ran completely smooth.
+1, it worked like a dream on the track after I got the software updated.
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      03-29-2009, 03:23 AM   #13
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Quote:
Originally Posted by Radiation Joe View Post
DON'T GET THE UPDATE, YET!!!!!!

Current update will cure the problems you described, but you'll end up with the dreaded "lag" in normal driving. I suspect the newest update will be available very shortly. Wait for that, then bring your car in.
Not terrible advice but not perfect either. My take would be if you are most concerned about track performance or very hard "canyon" performance I'd recommend getting the first DCT software. If you do mostly city driving or even mellow "suburb" type driving and mostly use D mode waiting for the next update would be advisable.
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      03-29-2009, 11:24 AM   #14
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Not terrible advice but not perfect either. My take would be if you are most concerned about track performance or very hard "canyon" performance I'd recommend getting the first DCT software. If you do mostly city driving or even mellow "suburb" type driving and mostly use D mode waiting for the next update would be advisable.
+1
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      03-29-2009, 11:57 AM   #15
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Quote:
Originally Posted by Radiation Joe View Post
DON'T GET THE UPDATE, YET!!!!!!

Current update will cure the problems you described, but you'll end up with the dreaded "lag" in normal driving. I suspect the newest update will be available very shortly. Wait for that, then bring your car in.
What is this dreaded lag you speak of in normal driving? I've yet to see it.
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      03-29-2009, 01:00 PM   #16
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Sounds like I will go through with the update on Friday, the 3rd. While I can understand the frustration with the "dreaded lag in D mode", I don't drive the car in D mode, so it's not as big an issue to me as how it performs on track. I'd rather let the wife deal with the lag in "D" mode and I not be made a fool of on track becasue of a transmission glitch

Thanks, you guys are awesome!

PS - To the one making fun of my question about the split second dealy, yes, I am one of those people who suffer anxiety waiting for [incandescent] lights to turn on when I flip the switch, which is why I avoid those newfangled "green" flourescent bulbs. I still don't know if is something that was not present before th 1200 miles service.
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      03-29-2009, 10:21 PM   #17
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Quote:
Originally Posted by M3V8Driver View Post
Sounds like I will go through with the update on Friday, the 3rd. While I can understand the frustration with the "dreaded lag in D mode", I don't drive the car in D mode, so it's not as big an issue to me as how it performs on track. I'd rather let the wife deal with the lag in "D" mode and I not be made a fool of on track becasue of a transmission glitch

Thanks, you guys are awesome!

PS - To the one making fun of my question about the split second dealy, yes, I am one of those people who suffer anxiety waiting for [incandescent] lights to turn on when I flip the switch, which is why I avoid those newfangled "green" flourescent bulbs. I still don't know if is something that was not present before th 1200 miles service.
Just messin . I'm as anal as you in reality. Before I had the DCT update there was definitely a lag between pulling the paddle and the gear shift. After the update, depending on how you're driving, it's near instantaneous (what I would call split second..and why I was joking). I know some would also consider a tiny lag "split second" also.
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      03-30-2009, 12:57 PM   #18
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Quote:
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He said split second delay lol. Maybe he thinks M stands for Miracles.
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      03-30-2009, 04:06 PM   #19
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Quote:
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What is this dreaded lag you speak of in normal driving? I've yet to see it.
He's talking about this:

http://www.m3post.com/forums/showthread.php?t=231020
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      03-30-2009, 04:47 PM   #20
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Quote:
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What is this dreaded lag you speak of in normal driving? I've yet to see it.
Slow speed delayed response in accelerating. Typically occurs in D mode after slowing and then trying to accelerate again.
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      03-30-2009, 06:03 PM   #21
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Go in the idrive and set the shift mode to the F1 setting.
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      03-30-2009, 06:10 PM   #22
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Well, Friday will be here before I know it, and the recall update will be done. Then I'll take it to the track again on Sunday and see how it behaves then. It better go from 5th to 4th to 3rd exactly when I want it or the car is going over a cliff. Glad I bought that gap insurance
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