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-   -   Transmission Jerk? (http://forum.e46fanatics.com/showthread.php?t=639785)

garabatoss 01-12-2009 11:39 PM

Transmission Jerk?
 
Hi,

Bought a 2003, 325i STEPTRONIC with a small problem.

This problem is only present in D mode, not in SD (weird). But when you are coming to a stop, and the car is downshifting speeds, right around 15 mph the car does a sudden jerk, like a strong downshift from 2nd to 1st. kinda like someone rear ended you, but not as hard. Even when you don't use the breaks, if you are just rolling to a stop, it does it.

What's wrong with it? it's every time and only on D mode.

i replaced brake pads, rotors and bushings recently so it's not that. Sounds to me like a transmission problem, but only from 2nd to 1st when almost at at a full stop.

Any help ? suggestions?

thank u in advanced

DWA626 01-13-2009 01:06 AM

I have same problem... Don't know if it is normal or not

Chris@ModBargains 01-13-2009 02:13 AM

Try and have your tranny software re-flashed to see if that can correct the problem.

garabatoss 01-13-2009 01:40 PM

do i need to take it to a BMW dealer to have the software re-flashed?

I think my car is not under warranty, so would that be costly?

thanx

vminev 01-13-2009 01:46 PM

How much does it cost to upgrade the software? I would like to do it too... :)

Goldman Sachs 01-13-2009 01:54 PM

This is supposed to work on 04-current bmws but you could give this a try. I did it on my 01 and seemed to do something for me and it couldn't hurt you.

put you key in the ignition and turn it to the 2nd position ( farthest you can go without turning the car on)
Then push and hold the gas pedal down all the way for 30 sec. That is supposed to reset the transmission which learns your driving habits.

Start her up and take it for a drive.
Good luck, thought it was worth a try!

The Jerk 01-13-2009 01:59 PM

I like Jerk transmissions :)

vladvm 01-13-2009 02:07 PM

when was the fluid changed? maybe it's time to replenish the friction property of the fluid.

vminev 01-13-2009 08:42 PM

Quote:

Originally Posted by Goldman Sachs (Post 9225261)
This is supposed to work on 04-current bmws but you could give this a try. I did it on my 01 and seemed to do something for me and it couldn't hurt you.

put you key in the ignition and turn it to the 2nd position ( farthest you can go without turning the car on)
Then push and hold the gas pedal down all the way for 30 sec. That is supposed to reset the transmission which learns your driving habits.

Start her up and take it for a drive.
Good luck, thought it was worth a try!

Thanks ... Im gonna try that tomorrow morning and report back if I feel any difference.. :)

sunydude 01-13-2009 08:50 PM

Ok Mine exactly had the same issue as above, I had the transmission flash done at the dealer which costed me around $250-300 (had some other maintenance done too). It definitely improved that jerk issue.

However I seem to be noticing it again now when its too cold out there in winter. Mine has 75k miles, so Im going to get the ATF changed soon.

zx9rbart 01-13-2009 08:50 PM

The gas pedal to the floor trick resets the drive by wire (throttle) adaptation values, and it only lasts for a few miles, this is in no way related to your tranny. The reflash at the dealer costs typically 1 hour labor (108 dollars for me). There is a TSB about rough 2 to 1 downshifts on early steptronics (according to my dealer) and they said that a software upgrade fixes 99.9 percent of the problems. Dont waste your time with the key2 throttle down trick.

walkabout 01-13-2009 08:53 PM

Garabatoss,
there is a software upgrade for your transmission concerning "harsh shifting" to a stop. It cost me $240 at the dealership. My car is 2003xi

jakajuka 01-15-2009 01:57 AM

Hi everybody.

I have a E46 330iA from 2002 with the same steptronic problem. I have changed the transmission oil and filter but the jerk remain.
The next step is a software upgrade/flash for the gearbox and then I will see.

regards
jakajuka

n2Bimmer 01-15-2009 10:45 AM

this happens to me when the tranny is cold, maybe the first 2 shifts that i come to a stop, but only when cold. change your oil.

DWA626 01-22-2009 01:46 AM

i'm hving my software re-flashed at the dealer today, hopefully it will work

jai_c 01-22-2009 01:54 AM

im experiencing the same prob, but i notice it more when the car is cold. I had the solenoids replaced and the fluid changed about 4 months ago after my tranny died.

garabatoss 01-22-2009 08:36 PM

Went to a mechanic and had the transmission software upgraded and IT WORKED!! so awesome. Thanks for the help. The software they used was EGS 0624.

//TRD power 01-22-2009 09:22 PM

the tranny downshifts to 2nd gear in D mode. 1st in SD doesn't it?

johnyvirsis 01-23-2009 02:44 AM

I have a 200 323ci, with a steptronic. But mine also does the jerking when i put it in R. I checked the tranny oil, looking good... Just recently bought the car... Does anyone know how much are the software updates for that?

SUHLeen 01-23-2009 09:39 AM

Quote:

Originally Posted by sunydude (Post 9227389)
Ok Mine exactly had the same issue as above, I had the transmission flash done at the dealer which costed me around $250-300 (had some other maintenance done too). It definitely improved that jerk issue.

However I seem to be noticing it again now when its too cold out there in winter. Mine has 75k miles, so Im going to get the ATF changed soon.

Quote:

Originally Posted by walkabout (Post 9227417)
Garabatoss,
there is a software upgrade for your transmission concerning "harsh shifting" to a stop. It cost me $240 at the dealership. My car is 2003xi

Quote:

Originally Posted by zx9rbart (Post 9227396)
The gas pedal to the floor trick resets the drive by wire (throttle) adaptation values, and it only lasts for a few miles, this is in no way related to your tranny. The reflash at the dealer costs typically 1 hour labor (108 dollars for me). There is a TSB about rough 2 to 1 downshifts on early steptronics (according to my dealer) and they said that a software upgrade fixes 99.9 percent of the problems. Dont waste your time with the key2 throttle down trick.

Quote:

Originally Posted by johnyvirsis (Post 9281540)
...Does anyone know how much are the software updates for that?

;)


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