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      09-30-2008, 06:31 PM   #23
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Quote:
Originally Posted by Arsenal View Post
I have also had the same problem. I have to pull the trigger at 7500RPM so DCT will change gears at 8400RPM. I think all DCT owners have this issue. I hope a software update will fix the problem. I'm pretty sure it could be resolved with an update. Shifts are lighting fast its just they shift a little late from pulling the trigger to actual shift.
This is why the shift lights come on early.... Use them, not the tach.
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      09-30-2008, 06:47 PM   #24
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      09-30-2008, 10:02 PM   #25
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I am a very happy M-DCT owner, and sure there have been like 3 glitches in several months of driving. Nothing that ever put me in harms way. BMW will make things right.

Just enjoy the car, and enough with all the negativity
when your car stalls in the middle of an intersection, i think you have a right for negativity
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      09-30-2008, 11:34 PM   #26
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Quote:
Originally Posted by Radiation Joe View Post
Ding. Ding. Ding. We have a winner.

This stalling out, as the OP calls it, is almost certainly running up against the rev limiter and is operator error, not a transmission issue. Someone please correct me if I am wrong.
+2. If you hit the limiter the acceleration ends fairly rapidly and violently. It it very easy to do in this car. You need to learn and use the shift lights.

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I think we can write this thread off.
I agree that it sounds incredibly unlikely that anyone from BMW told a possible customer to "wait a year" on any of their products. At the same time markjenz, the OP has been a good contributor to the forum. I'm pretty sure He holds the record for E92 M3 recorded speed with photo evidence!
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      09-30-2008, 11:56 PM   #27
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Quote:
Originally Posted by Arsenal View Post
I have also had the same problem. I have to pull the trigger at 7500RPM so DCT will change gears at 8400RPM. I think all DCT owners have this issue. I hope a software update will fix the problem. I'm pretty sure it could be resolved with an update. Shifts are lighting fast its just they shift a little late from pulling the trigger to actual shift.
dude that why you got shift lights ... i just shift when those lights go red and it shifts perfect every time ... no issue

Enigma: oops you said the same thing ... Arsenal after driving the car for a bit you would have figured this one out ....
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      10-01-2008, 07:06 AM   #28
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you are probably right with saying one should use the shift lights...i had a mt for one year and it was great to rev it up to 8400..(if the engine is capable of reving that high i want to do it)
now with the dct it looks you cannot go that far...ok...but still the abrupt way the next gear set in frightened me!

coming back on the words of bmw:

i know 3 people here in germany who had severe discussions with bmw about their dct and finally got their cars changed into mt. bmw was not happy about this... i know some (all are doing track days) who still are in the process of negociating....my impression is that bmw is pissed off cause they think the transmission works quite well in normal driving, which is true...

when i had the call, i mentioned all this and said i do not want to have discussions in 2 months after having bought the dtc...they should gaurantee, that all problems will be solved!

to make it clear: i would love to have this transmission, but i will use the car on the track quite often and for this the problems are too annoying if not sorted out completely.


maybe i am wrong and the software update will be fine...and all of you dtc owners will be happy!!!


p.s. the car i drove was jun08...
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      10-01-2008, 07:27 AM   #29
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      10-01-2008, 08:59 AM   #30
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As I wrote in the other DCT software thread, could the shift lag at redline thing be due to tach lag? You're commanding the shift when the tach says 7500, but maybe the true RPM is like 8300, hence hitting the limter? When you're accelerating hard the revs build up very fast. It was like this in the E46 M3 too. I could very well believe that the tachometer is not keeping up.
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      10-01-2008, 09:08 AM   #31
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Quote:
Originally Posted by ersin View Post
As I wrote in the other DCT software thread, could the shift lag at redline thing be due to tach lag? You're commanding the shift when the tach says 7500, but maybe the true RPM is like 8300, hence hitting the limter? When you're accelerating hard the revs build up very fast. It was like this in the E46 M3 too. I could very well believe that the tachometer is not keeping up.
Well, but even if the tach is wrong (which I personally kinda doubt, other than maybe <= 100 RPM), the shift lights are there to tell you when to shift. They should not have any lag in them since they are not mechanical. Personally I think the tach is probably pretty accurate, but who knows. I guess one way to check would be to call up the "hidden menu" and set it to display RPM in the dash readout. There again, lag should not be present.
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      10-01-2008, 09:12 AM   #32
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Quote:
Originally Posted by GT3 Tim View Post
Not really.

I have had some issues, but not those the OP speaks of.

Edit: I should point out that I have had ignored downshift commands....but they were NOT under heavy braking or at high speeds! This happened while just "normally driving" the car.
Hey Tim, what's the latest on your car over at the dealership?

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      10-01-2008, 09:57 AM   #33
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any word Tim?

also any official word on this update?
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      10-01-2008, 12:35 PM   #34
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The wait a year comment was probably sarcasm .... hang on, can German Engineers being sarcastic ? ... Mmm ....
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      10-01-2008, 01:10 PM   #35
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Quote:
Originally Posted by adamr View Post
dude that why you got shift lights ... i just shift when those lights go red and it shifts perfect every time ... no issue

Enigma: oops you said the same thing ... Arsenal after driving the car for a bit you would have figured this one out ....
Yes but when I use the shift lights the gears change earlier than 8400RPM. Am I doing something wrong?
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      10-01-2008, 01:20 PM   #36
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Quote:
Originally Posted by Arsenal View Post
Yes but when I use the shift lights the gears change earlier than 8400RPM. Am I doing something wrong?
No but there is most probably some built in error margin because they want it to work properly even for those with slower reaction times. You could just hold out a split second longer to get it to shift close to redline. Realistically, you are not going to get it to shift right at redline everytime without a lot of practice. This goes for a 6MT too though - you are likely to bang the limiter now and again if you always rev it right to redline.

Edit: I should add - if you are not in S5 or S6, its likely it will tell you to shift earlier anyway (can't verify that yet myself - car still not broken in).
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      10-02-2008, 05:55 PM   #37
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Quote:
Originally Posted by mkoesel View Post
No but there is most probably some built in error margin because they want it to work properly even for those with slower reaction times. You could just hold out a split second longer to get it to shift close to redline. Realistically, you are not going to get it to shift right at redline everytime without a lot of practice. This goes for a 6MT too though - you are likely to bang the limiter now and again if you always rev it right to redline.

Edit: I should add - if you are not in S5 or S6, its likely it will tell you to shift earlier anyway (can't verify that yet myself - car still not broken in).
I always drive in S5 mode and when I follow the shift lights I don't hit the Revlimit, but it does shift earlier than 8400Rpm. I will try in S6 mode and see what happens.
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      10-02-2008, 09:47 PM   #38
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Hey, SWAMP, FOOTIE, can you guys chime in if you are looking at this thread?!
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      10-02-2008, 10:12 PM   #39
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where is MarksM he was supposed to get the new software wednesday.
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      10-02-2008, 11:09 PM   #40
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DCT is working great for me. I'm sure there are a few buggy cars out there but that would apply to more than just DCT. I wouldn't even think twice about going DCT again.
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      10-02-2008, 11:33 PM   #41
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Quote:
Originally Posted by grayshrk View Post
DCT is working great for me. I'm sure there are a few buggy cars out there but that would apply to more than just DCT. I wouldn't even think twice about going DCT again.
I have had no real issues on the street. Just the odd track issues
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      10-03-2008, 02:03 AM   #42
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Originally Posted by e46e92love View Post
Hey, SWAMP, FOOTIE, can you guys chime in if you are looking at this thread?!
As my car with only be getting it's 1200 miles service next Friday I think it would be silly to make a comment other than it is more difficult to judge when to change in a DCT car than a manual. The reason for this is that in a manual when you chose to make the change you take your foot off the throttle, so the car is no longer increasing the revs. In a DCT you don't release the throttle and even though you flick the paddle there is a slight delay between that and the shift taking place, so in the shorter gears (1st and 2rd) it will take time to learn the optimum point to conduct the shift.

Practice makes perfect.
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      10-03-2008, 07:58 AM   #43
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as you continue to drive more, you will get the know the car better, and learn how it shifts. right now I can redline without worry about hitting the limited, you will learn to anticipate the shift.

also, as footie said, in the low gears and under light/moderate acceleration the shift won't be as aggresive/fast
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      10-03-2008, 11:25 AM   #44
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DCT is working great for me. I'm sure there are a few buggy cars out there but that would apply to more than just DCT. I wouldn't even think twice about going DCT again.
have you tracked it?
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