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 pertaining to the flagship BMW here.

Reply
 
Thread Tools Display Modes
  #1  
Old 12-13-2014, 10:22 PM
meangreen94z meangreen94z is offline
Officially Welcomed to the 'Fest
Location: Houston
 
Join Date: Jun 2010
Posts: 175
Mein Auto: 2004 BMW 745i sport
So I went through my transmission valve body today.......

I did the Sonnax zip kit and EDS solenoids today. From what I've read debris in the solenoids and their screens is a common source of shift quality issues. There's a local shop in Houston who will flush and flow test them on a machine for $250. I opted for new EDS solenoids, as the newer solenoids are improved parts. As far as the 5th gear surge at 35-40mph, from what I've gathered it's due to pressure loss in the Clutch A control pressure regulator valve bore. I've heard some claim new solenoids addressed it, but the general consensus seems to be they are not the source of the issue. The zip kit addresses this circuit, although excessively worn valve bodies may need an oversized valve.

Beyond the just purchasing the zip kit, you'll need to get the part number off the valvebody separator plate to order the correct new one. The repair instructions mention you can reuse the plate if the gasket material stays intact, but it's pretty much guaranteed to come apart(mine did). You'll need the bridge seal adapter and the 4 round seals are recommended as well. I replaced the pan/filter and fluid(I used over 9 quarts to refill after the repair).

I cleared adaptations, it took about 10 miles of driving at various speeds for it to completely adapt. The 35-40 5th gear surge is gone, and shift quality is like new.
Attached Thumbnails
Click image for larger version

Name:	image.jpg
Views:	83
Size:	89.8 KB
ID:	481218  

Last edited by meangreen94z; 12-13-2014 at 10:56 PM.
Reply With Quote
Advertisement
  #2  
Old 12-13-2014, 10:44 PM
meangreen94z meangreen94z is offline
Officially Welcomed to the 'Fest
Location: Houston
 
Join Date: Jun 2010
Posts: 175
Mein Auto: 2004 BMW 745i sport
Disassembled
Attached Thumbnails
Click image for larger version

Name:	image.jpg
Views:	48
Size:	171.6 KB
ID:	481220  
Reply With Quote
  #3  
Old 12-13-2014, 10:48 PM
meangreen94z meangreen94z is offline
Officially Welcomed to the 'Fest
Location: Houston
 
Join Date: Jun 2010
Posts: 175
Mein Auto: 2004 BMW 745i sport
Old accumulators, end plugs and Clutch A valve and sleeve
Attached Thumbnails
Click image for larger version

Name:	image.jpg
Views:	43
Size:	165.6 KB
ID:	481222  

Last edited by meangreen94z; 12-13-2014 at 10:49 PM.
Reply With Quote
  #4  
Old 12-13-2014, 10:51 PM
meangreen94z meangreen94z is offline
Officially Welcomed to the 'Fest
Location: Houston
 
Join Date: Jun 2010
Posts: 175
Mein Auto: 2004 BMW 745i sport
Vacuum tester
Attached Thumbnails
Click image for larger version

Name:	image.jpg
Views:	40
Size:	126.5 KB
ID:	481223  
Reply With Quote
  #5  
Old 12-13-2014, 10:52 PM
meangreen94z meangreen94z is offline
Officially Welcomed to the 'Fest
Location: Houston
 
Join Date: Jun 2010
Posts: 175
Mein Auto: 2004 BMW 745i sport
Old EDS solenoids
Attached Thumbnails
Click image for larger version

Name:	image.jpg
Views:	42
Size:	125.2 KB
ID:	481224  
Reply With Quote
  #6  
Old 12-13-2014, 10:54 PM
meangreen94z meangreen94z is offline
Officially Welcomed to the 'Fest
Location: Houston
 
Join Date: Jun 2010
Posts: 175
Mein Auto: 2004 BMW 745i sport
New EDS solenoids
Attached Thumbnails
Click image for larger version

Name:	image.jpg
Views:	35
Size:	138.3 KB
ID:	481225  

Last edited by meangreen94z; 12-13-2014 at 10:55 PM.
Reply With Quote
  #7  
Old 12-13-2014, 11:13 PM
bmwmoe bmwmoe is offline
Registered User
Location: milwaukee WI
 
Join Date: Aug 2014
Posts: 27
Mein Auto: bmw 760li
Hi I have 2003 bmw 760li made in 02/2003 would a 07/2003 transmission fit my car? And whats the differences? Thx
Reply With Quote
  #8  
Old 12-13-2014, 11:31 PM
meangreen94z meangreen94z is offline
Officially Welcomed to the 'Fest
Location: Houston
 
Join Date: Jun 2010
Posts: 175
Mein Auto: 2004 BMW 745i sport
Quote:
Originally Posted by bmwmoe View Post
Hi I have 2003 bmw 760li made in 02/2003 would a 07/2003 transmission fit my car? And whats the differences? Thx
No it shows there was a production change as of 3/03. Different part numbers. You can look them up by production date at realoem.com
Reply With Quote
  #9  
Old 12-13-2014, 11:39 PM
bmwmoe bmwmoe is offline
Registered User
Location: milwaukee WI
 
Join Date: Aug 2014
Posts: 27
Mein Auto: bmw 760li
Yea 3/03 mine was made before that date so its a different part # then the one before 3/03 idk whats the difference between them
Reply With Quote
  #10  
Old 12-14-2014, 06:07 AM
meangreen94z meangreen94z is offline
Officially Welcomed to the 'Fest
Location: Houston
 
Join Date: Jun 2010
Posts: 175
Mein Auto: 2004 BMW 745i sport
Quote:
Originally Posted by bmwmoe View Post
Yea 3/03 mine was made before that date so its a different part # then the one before 3/03 idk whats the difference between them
There were several hardware revisions to the transmission and its mechatronics, along with unique software, over the first few years due a multitude of shift complaints.

I found this PDF a while ago that applies to the 6hp26 in the 745, but the revision dates to the 6hp32 in the 760 seem to match it(which makes sense). Look at page 29 for a breakdown of the production splits.

http://www.apra-europe.org/dateien/d...chatronics.pdf
Reply With Quote
Reply

Bookmarks


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 10:23 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
© 2001-2011 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms