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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.

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  #1  
Old 09-05-2016, 06:32 PM
jmindler jmindler is offline
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Location: charleston, sc
 
Join Date: Sep 2007
Posts: 43
Mein Auto: 1996 328i
Harsh 2 to 2 downshift

Hello all, I know this topic has been touched on many times. This is a little different. I had the transmission rebuilt in my 2005 745li in March of this year. A new torque converter, and a new complete valve body, guibo, and rear ujoint where replaced at that time. The trans started to downshift from 2 to 1 hard last week. Took it back to the trans shop, there where no trans fault codes, and they say no internal issues with the trans.
Could this be a software update issue, or is there any thing else that can cause the issue? It only happens after the car reaches operating temperature.
The check engine light has been on for a while for secondary air injection issues.
Thanks in advance for any help.
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  #2  
Old 09-05-2016, 06:35 PM
jmindler jmindler is offline
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Location: charleston, sc
 
Join Date: Sep 2007
Posts: 43
Mein Auto: 1996 328i
Sorry. The post headline should read 2 to1 downshift
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  #3  
Old 09-10-2016, 09:34 AM
jmindler jmindler is offline
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Location: charleston, sc
 
Join Date: Sep 2007
Posts: 43
Mein Auto: 1996 328i
Any ideas??
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  #4  
Old 09-13-2016, 07:01 AM
romek12 romek12 is offline
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Location: Harper Woods Michigan
 
Join Date: Aug 2015
Posts: 215
Mein Auto: 1997 528i & 2008 750li
Insert the Key to into the key fob (DON'T HOLD THE BRAKE).
Press the Start Button ONCE, just so the car electronics start and show the Engine light is on. (Again, Don't START the Engine).
Press and HOLD the GAS PEDAL all the way to the force down click on the gas pedal for 25 seconds.
After those 25 Seconds, proceed to Starting the Engine and drive your car.

This resets the adaptations. Maybe that will help. If not you will need to reset your adaptation using a bmw programming program. Not sure if its a 100% fix but worth a try.
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  #5  
Old 09-13-2016, 08:52 AM
ChrisChris ChrisChris is offline
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Location: Herts, UK
 
Join Date: Nov 2015
Posts: 19
Mein Auto: 760Li E66 + others
also take it to your dealer if the above suggested by romek12 does not help since apparently there is an issue (discussed in other threads) that the firmware can be updated to soften the changes on the box.
According to the dealer this is is only uploaded if the customer complains of hard changing, i think the cost is around 60 fro BMW update unless you can do this yourself.

Check the oil level too in the tranny.

I think your best best is resetting the adaption valves first though.
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  #6  
Old 09-24-2016, 04:48 AM
amer735 amer735 is offline
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Location: Bahrain
 
Join Date: Mar 2016
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Mein Auto: BMW
I got the same problem along with some other as a result of fixing transmission leak

So I took my E65 to fix transmission oil leak, but it seems that the mechanic does not have enough experience and I receive that car in bad condition and although the original leak stopped, but another leak developed from the transmission filter as the mechanic over tighten the 21 screws.

Problems that I had was hard down shift as I come to complete stop, moreover, there was a rattle sound while in idle that increases when I turn the ac on.

I took the car to another mechanic who asked me to relace the filter and added 3 bottles of original bmw gear oil and boom,,, all strange noises went away and the transmission went back to its original state
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  #7  
Old 10-13-2016, 04:33 PM
jmindler jmindler is offline
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Location: charleston, sc
 
Join Date: Sep 2007
Posts: 43
Mein Auto: 1996 328i
Update:
Took the car back to the rebuilder. The transmission was totally disassembled, and checked. All okay.
Rebuilder called Revmax, that's where he got the valve body from. The valve body was sent back, and it checks okay.
Revmax states that the trans. Control unit is bad now.
I do not want to spend money on a trans. Control unit if not needed.
Please, any thoughts??
Thanks
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  #8  
Old 10-14-2016, 07:55 AM
A B Able Truck's Avatar
A B Able Truck A B Able Truck is offline
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Location: San Diego
 
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Posts: 1,628
Mein Auto: 2006 550I (N62TU) V8
I would hope they did a complete rebuild and good job. Keep in mind that a rebuild normally is just replacing bad parts at that time & ones they are able/equipped to identify while reusing what they could (as opposed to being remanufactured). But the more you know and understand (See page 67 Symptoms & Corrections)

http://d2q1ebiag300ih.cloudfront.net...f?v=1459186576
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  #9  
Old 11-04-2016, 06:12 PM
jmindler jmindler is offline
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Location: charleston, sc
 
Join Date: Sep 2007
Posts: 43
Mein Auto: 1996 328i
Update: we received a new valve body from Revmax after emailing the BBB and states attorney generals office. New valve body in, and a new battery. The car drives like new.
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