Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 7 Series / 8 Series > 7 Series - E65 / E66 (2002 - 2008)

7 Series - E65 / E66 (2002 - 2008)
Discussion of BMW's 4th generation E65/E66 7 Series flagship. The E65 generated much controversy, due to its radical styling and iDrive user difficulties. Nonetheless, the E65 broke records to become the best-selling 7-series iteration ever, especially after its 2005 facelift.

Reply
 
Thread Tools Display Modes
  #1  
Old 05-02-2016, 05:31 AM
BimmerKais BimmerKais is offline
Officially Welcomed to the 'Fest
Location: Dubai
 
Join Date: Dec 2015
Posts: 115
Mein Auto: 745iL
Transmission (Gears started shifting at higher rpm)

This has happened thrice before at different times.

What happens is that gears shift quite normally during everyday commute (1 hour to and from work) but if the car gets a continuos run for lets say, more than 2 hours, suddenly the transmission down shifts to 3rd gear and would only upshift if the revs goes beyond 4000.

This doesnt happens everyday but at an uneven pattern. What i noticed linked with this issue is the hidden menu (outside temp) reading which shows 50C when this stupid gear shifts begin.

I have to leave the car parked and off overnight to get the normal transmission working. Something warms up somewhere in the transmission or the sensor gives a false outside temp reading (its never 50C outside in this time of the year) that makes transmission act weird.

Below in this pic these are the readings on the dash when this problem starts. As you can see, normal outside temp is 33C but on hidden menu it says 50C. It creeps up really quick on the hidden menu and thats when downshift occurs all of the sudden at 50C



I have tried changing gears in manual mode but upshift wont work once transmission starts behaving like such. Yes, but it would downshift. First gear it will downshift to is the M3 or the third gear. Any upshift will occur after 4000rpm.

Now i have scanned the fault codes and it does not have any transmission error. Although, there is one E-Box 27A0 code that shows and im thinking that the failed cooling fan for the ECUs lets computers go hot beyond their normal operational temp. This might cause transmission to behave weird. Im not sure and these could be totally two different problems.


I need advice here and suggestions.

Thanks

Last edited by BimmerKais; 05-02-2016 at 05:39 AM.
Reply With Quote
Advertisement
  #2  
Old 05-03-2016, 07:17 AM
BimmerKais BimmerKais is offline
Officially Welcomed to the 'Fest
Location: Dubai
 
Join Date: Dec 2015
Posts: 115
Mein Auto: 745iL
Bump
Reply With Quote
Reply

See More Related BMW Stories


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 7 Series / 8 Series > 7 Series - E65 / E66 (2002 - 2008)
Today's Posts Search
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On



Forum Jump


All times are GMT -7. The time now is 03:42 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
© 2001-2015 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms