robg

There is no throttle blip in the Step. You only hear the revs increce from the down shift.
[/quote]

Actually, it does blip.

I hear it every day and (no offence) know the difference between downshifting and "blipping" (former BMW test driver and Audi/Porsche Asst Svc Mgr)

There is probably no way you would hear it on a stock exhaust but it is VERY noticeable on mine as low revs are much louder than stock.
[/quote]


I am certainly not a transmission expert, but I have owned BMW's with both the Step and teh SMG. The SMG throttle blip that people refer to is definitely differnt than anything that happens on a Step. It refers to an increace in throttle to macth revs, the equivalent of the "heel toe" on a traditional manual.

EBMCS03

There is no throttle blip in the Step. You only hear the revs increce from the down shift.
[/quote]

Actually, it does blip.

I hear it every day and (no offence) know the difference between downshifting and "blipping" (former BMW test driver and Audi/Porsche Asst Svc Mgr)

There is probably no way you would hear it on a stock exhaust but it is VERY noticeable on mine as low revs are much louder than stock.
[/quote]


I am certainly not a transmission expert, but I have owned BMW's with both the Step and teh SMG. The SMG throttle blip that people refer to is definitely differnt than anything that happens on a Step. It refers to an increace in throttle to macth revs, the equivalent of the "heel toe" on a traditional manual.
[/quote]

Ya I drove the Step recently and it does not rev match like my SMG... no where close! It really does feel like the transmission is just pulling up the revs not as much so the motor.

UKAussi

There is no throttle blip in the Step. You only hear the revs increce from the down shift.
[/quote]

Actually, it does blip.

I hear it every day and (no offence) know the difference between downshifting and "blipping" (former BMW test driver and Audi/Porsche Asst Svc Mgr)

There is probably no way you would hear it on a stock exhaust but it is VERY noticeable on mine as low revs are much louder than stock.
[/quote]

Sorry, I was in a rush yesterday and forgot to add that although I hear it every day it does NOT do it ALL the time. It is most often heard within the 1st couple of minutes after startup as I drive through my neighborhood to the main road or just after I leave work.

gwf545

I tried real hard yesterday to get my 545 with Step to blip it's throttle on downshift yesterday and I couldn't. I downshifted single & mulitple gears, multiple times at varying speeds, varying throttle amounts, and RPM's. I had the audio muted and listened carefully as well as watched the tach and I never detected it. I did hear and see on the tach the lock-up clutch engage & disengage. Maybe that's what you are experiencing here or possibly it is just a very subtle blip.

psam550

I AM EXPERIENCING THIS, TOO. DEALER IS TELLING ME THAT THE PROGRAMMING FIX IS NOT COVERED UNDER THE CERTIFIED PRE-OWNED WARRANTY AND IT WILL COSTS $175. SINCE THIS EFFECTS THE TRANNY, I DON'T UNDERSTAND ITS POSITION. ANY SUGGESTIONS?

IF I HAVE TO PAY, IS IT WORTH $175. WILL IT FIX OTHER PROBLEMS, LIKE THE SHUDDERING AT LOW/LAG SPEEDS (FEELS LIKE THE TRANNY WANTS TO BE IN TOO HIGH A GEAR).

THANKS.

KAF

Had 17.1, then upgraded to 25, still got slam, as far as I am concerned they have not fixed it and probably never will.

flyingpuck

BMW went through all of the quick "fixes" on my transmission to fix the SLAM, and in the end it was only the replacement of the transmission (on their dime) that solved the problem!

psam550

Update: The shop foreman at the dealer (great guy) advised of a recent service bulletin (SIB 24 03 09) which looks like it addresses this type problem. The repair is (surprise) a new version of code using the new BMW sotware system--ISTA. Dealer installed it today for free. (It is covered under the new car and CPO warranties.) I will have to wait for tomorrow morning for a cold start test-- but so far the car drives like new. Cleaner, better shifts. Faster. I don't know if it's the new program or the fact that the transmission was cleared of what it had learned-- but whatever it is, I hope it lasts. Here is a link to the bulletin: http://www.bmwtis.com/tsb/bulletins/...p/B240309g.htm

SI B 24 03 09
Automatic Transmission April 2009
Technical Service

SUBJECT
550i and 650i with N62TU and 6HP26 - Various Drivability Complaints


MODEL
E60, 550iA produced from 09/05 up to 02/07

E63, E64; 650i produced from 09/05 up to 09/07


SITUATION
The customer may complain about one or a combination of the following situations, listed below:

Intermittent harsh 4-3, 3-2 or 2-1 downshift (jolt) when coming to a stop with light brake application.

Jolts and/or jerks felt when reaccelerating after coasting.

Judder when gently accelerating (most noticeable at an engine speed below 2,000 RPM).

CAUSE
DME and EGS software calibration

SOLUTION
Program the vehicle with ISTA/P 2.33.0 or later, using the path "Conversion" and "Downshift behavior". After this modification, the k-word "HADS" will be added to the Vehicle Order.

Note that ISTA/P will automatically reprogram and code all programmable control modules that do not have the latest software.

For information on programming and coding with ISTA/P, refer to CenterNet / Aftersales Portal / Service / Workshop Technology / Vehicle Programming".

WARRANTY INFORMATION
Covered under the terms of the BMW New Vehicle Limited Warranty or the Certified Pre-Owned Program.

Defect Code:
24 00 33 98 00

gwf545

Is there a similar TSB for the 545i? If so, if our car is now out of warranty, even though we've had it in for repair of this problem multiple times while it was under warranty and they were unable to fix it, are we supposed to pay for this fix now? Is there some sort of appeal process for problems like this?

jdk

Is there a similar TSB for the 545i? If so, if our car is now out of warranty, even though we've had it in for repair of this problem multiple times while it was under warranty and they were unable to fix it, are we supposed to pay for this fix now? Is there some sort of appeal process for problems like this?
[/quote]

Hey gwf545, I am in the same boat as you? Did you find any SIBs for a 545i or did you find out if this one will work for the 545i?