Home Forums Articles How To's FAQ Register
Go Back   Xoutpost.com > BMW SAV Forums > X5 (E70) Forum
Arnott
User Name
Password
Member List Premier Membership Search Today's Posts Mark Forums Read

Xoutpost server transfer and maintenance is occurring....
Xoutpost is currently undergoing a planned server migration.... stay tuned for new developments.... sincerely, the management


Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 08-31-2016, 03:23 PM
Member
 
Join Date: Jun 2016
Location: Seattle
Posts: 5
didakaX5 is on a distinguished road
Transmission Issue

Hey folks,

I have '12 X5 3.5i that I got back in February and have this weird thing going on that even got the BMW dealer here stunned with it.
Here's what's going on: Car is fine when cold in the morning - upshifting and downshifting is like it's designed to work. Then it reaches a point where the issue I have is showing up when i get in stop-and-go traffic after the car has been driven for at least 30min.(sometimes it takes less if warmer outside, or longer on colder days). When slowing down to a stop, after the transmission has shifted up to 3rd or 4th gear, there i this violent shudder the RPM's drop to about 500 and immediately go up to 900 for about 2-3 seconds before it eventually evens out to 600rpm. When still at dead stop and when I release the brake, it feels like only in that moment the transmission finds the right gear to start going again. On occasions, the RPM's fluctuate up and down with about 100 in between. Here's a link to the video of what's going on.

https://www.youtube.com/watch?v=fY7BYJwI9vI

I had the car at the dealer for about 5 days and they performed the software flash update, but after the issue showed up again gave me the b.s. crap they couldn't figure it out and asked me to approve an amount to start replacing parts.
I just replaced the tranny fluid and filter, but yet no luck.

I hope one of you folks can help or give me an idea what this may be related to!
Reply With Quote

Sponsored Links

  #2  
Old 08-31-2016, 11:35 PM
Member
 
Join Date: Apr 2013
Location: Charlotte
Posts: 397
absentmathis is on a distinguished road
Sadly, dealers are horrifically bad at diagnosing and repairing anything transmission related.
Reply With Quote
  #3  
Old 09-01-2016, 12:36 AM
bawareca's Avatar
Member
 
Join Date: Nov 2010
Location: Los Angeles
Posts: 976
bawareca is on a distinguished road
Quote:
Originally Posted by absentmathis View Post
Sadly, dealers are horrifically bad at diagnosing and repairing anything transmission related.
Or anything car related
Reply With Quote
  #4  
Old 09-01-2016, 10:23 PM
ard ard is offline
Member
 
Join Date: Mar 2006
Location: Sierra Foothills, California
Posts: 6,732
ard is on a distinguished road
No warranty?

Feels like new transmission time.

UNLESS you take it to a shop that will open up the trans and get after the valve body- flush it, clean, refresh seals.

IMO when the AT fluid gets hot it thins (lower viscosity) and the transmission is then no longer is generating proper pressures to move actuators, etc around.

BMW dealers do not open transmissions...

Find a shop that can work on transmissions, that ONLY works on transmissions.

I cannot recommend this more strongly- I am convinced that we will see more and more E70 trans issues and we have little to no knowledge on how to fix these internals. (I will add that as a wife-driven car, who likely has never pressed on the skinny pedal hard enough to cause a downshift, **I** will not one of these trailblazers... )

Last edited by ard; 09-01-2016 at 11:37 PM.
Reply With Quote
  #5  
Old 09-01-2016, 11:31 PM
Member
 
Join Date: Apr 2013
Location: Charlotte
Posts: 397
absentmathis is on a distinguished road
^ yep
Reply With Quote
  #6  
Old 09-02-2016, 07:57 AM
Member
 
Join Date: Sep 2015
Location: Mass
Posts: 27
davidmaria1 is on a distinguished road
My opinion. I'm not sure this is a trans issue. If the symptoms disappeared for a few days, would that happen with a mechanical trans issue? When the car is slowing to a stop, the rpms bump up slightly with every downshift, which looks normal, and under brisk acceleration, the shifts look crisp. I'd get another diag from a different dealer, or a known competent independent shop.
Reply With Quote
  #7  
Old 09-02-2016, 01:07 PM
Member
 
Join Date: Jun 2016
Location: Seattle
Posts: 5
didakaX5 is on a distinguished road
Quote:
Originally Posted by ard View Post
No warranty?

Feels like new transmission time.

UNLESS you take it to a shop that will open up the trans and get after the valve body- flush it, clean, refresh seals.

IMO when the AT fluid gets hot it thins (lower viscosity) and the transmission is then no longer is generating proper pressures to move actuators, etc around.

BMW dealers do not open transmissions...

Find a shop that can work on transmissions, that ONLY works on transmissions.

I cannot recommend this more strongly- I am convinced that we will see more and more E70 trans issues and we have little to no knowledge on how to fix these internals. (I will add that as a wife-driven car, who likely has never pressed on the skinny pedal hard enough to cause a downshift, **I** will not one of these trailblazers... )
Ard - All of these are very good points. No Warranty left on the vehicle for it's at 53000. This is very weird issue for the fact that it does the same thing when engine at transmission are at operating temperature and at parked car you put the selector on D or R, it will do the same shuttering dropping the RPM's. Someone suggested it may be the clutch, but in this case the vehicle is at a dead stop. If you raise the RPM's to 1000 and then shift between D-N-R, the shuttering goes away. Dealer here investigated some vacuum leaks and said they found one and repaired it, so I'm more inclined to go that direction like davidmaria1 suggested.
I took the car to an indy shop and they were not sure what was going on, but were convinced it was not the tranny. I am thinking I need a 3rd opinion.
Reply With Quote
  #8  
Old 09-02-2016, 02:45 PM
ard ard is offline
Member
 
Join Date: Mar 2006
Location: Sierra Foothills, California
Posts: 6,732
ard is on a distinguished road
Search for BMW goodwill. The dealer has the ability, in some cases, to cover issues just outside warranty.

The transmission contains a pump. This pump pressurizes ATF that flows through the valve body and causes actuators to move.

When you increase the engine speed, you increase the pump output...this can then overcome the leaking of fluid. Hence at low idle it is showing a problem, at high idle there is enough pressure.

A transmission shop (NOT BMW dealer; NOT BMW Indy) will connect pressure gauges to an AT and monitor shifting pressures, to help diagnoses.

You keep taking it to BMW shops and car places, I expect they will never find this issue (if it is trans)
Reply With Quote
  #9  
Old 09-02-2016, 03:24 PM
Member
 
Join Date: Jun 2016
Location: Seattle
Posts: 5
didakaX5 is on a distinguished road
Quote:
Originally Posted by ard View Post
Search for BMW goodwill. The dealer has the ability, in some cases, to cover issues just outside warranty.

The transmission contains a pump. This pump pressurizes ATF that flows through the valve body and causes actuators to move.

When you increase the engine speed, you increase the pump output...this can then overcome the leaking of fluid. Hence at low idle it is showing a problem, at high idle there is enough pressure.

A transmission shop (NOT BMW dealer; NOT BMW Indy) will connect pressure gauges to an AT and monitor shifting pressures, to help diagnoses.

You keep taking it to BMW shops and car places, I expect they will never find this issue (if it is trans)

That's what I have been trying to find out. What is the real issue? If I knew it is in fact the transmission, I may not even bother repairing it. Isn't an 8-speed transmission a sealed unit that you cannot work on? Except for the filter and solenoids.
Reply With Quote
  #10  
Old 09-02-2016, 05:13 PM
Member
 
Join Date: Nov 2009
Location: San Diego, CA, USA
Posts: 261
ChuckG is on a distinguished road
Quote:
Originally Posted by didakaX5 View Post
That's what I have been trying to find out. What is the real issue? If I knew it is in fact the transmission, I may not even bother repairing it. Isn't an 8-speed transmission a sealed unit that you cannot work on? Except for the filter and solenoids.
That is what BMW will say but it is BS. If they put another transmission in they will send yours out to be rebuilt. They just don't rebuild them at the dealer. The just remove them and replace.
Reply With Quote
Reply

Bookmarks

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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On





All times are GMT -4. The time now is 10:27 AM.
vBulletin, Copyright 2024, Jelsoft Enterprises Ltd. Search Engine Friendly URLs by vBSEO 3.6.0
© 2017 Xoutpost.com. All rights reserved. Xoutpost.com is a private enthusiast site not associated with BMW AG.
The BMW name, marks, M stripe logo, and Roundel logo as well as X3, X5 and X6 designations used in the pages of this Web Site are the property of BMW AG.
This web site is not sponsored or affiliated in any way with BMW AG or any of its subsidiaries.