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 > 3 Series / 4 Series > E46 (1999 - 2006)

E46 (1999 - 2006)
The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

Reply
 
Thread Tools Display Modes
  #1  
Old 09-19-2012, 08:17 AM
bimcwe bimcwe is offline
XIL
Location: Illinois
 
Join Date: Aug 2012
Posts: 122
Mein Auto: 2002 325xi
The Transmission Flush Debate (TO FLUSH OR NOT TO FLUSH)

I was reading this: http://suite101.com/article/do-you-n...nsmission-a786
And though I've certainly heard that a flush can possibly be detrimental to the transmission, I've also heard the exact opposite. I was wondering as to what other BMW owners thought on the matter .

Last edited by bimcwe; 09-20-2012 at 05:06 PM. Reason: said engine instead of transmission*, not sure why o_0
Reply With Quote
Advertisement
  #2  
Old 09-19-2012, 08:47 AM
jvr826's Avatar
jvr826 jvr826 is offline
Is it Trackday yet?
Location: In the woods. Santa Cruz County, CA
 
Join Date: Apr 2002
Posts: 8,865
Mein Auto: 05 330ci 6MT
Flushing your transmission has nothing to do with your engine... completely different components. That said, read the WIKI and search the archives for tons of information on this subject.
__________________
Jeff R.
Golden Gate Chapter BMW CCA - Autocross - Come Join Us!


"You drive like old people $#@%... slow and sloppy!" - George Carlin
Reply With Quote
  #3  
Old 09-19-2012, 10:10 AM
MalibuMafiaV's Avatar
MalibuMafiaV MalibuMafiaV is offline
L4P
Location: Malibu, CA
 
Join Date: Jul 2005
Posts: 11,552
Send a message via AIM to MalibuMafiaV
Mein Auto: E60 M5 & Stage 3 Audi S4
How many miles on your auto trans?
__________________
http://www.luxury4play.com
BMW 2006 M5 - REALLY LOUD
Audi S4 2000 Stage 3 - Dat turbo spool
BMW 2000 3-series - Supercharged Because race car SOLD
Maserati 2004 M128 GT - HREs/tint/straight piped SOLD
BMW 2006 M3 - stock - SOLD
Reply With Quote
  #4  
Old 09-19-2012, 10:48 AM
charlesberry's Avatar
charlesberry charlesberry is offline
Officially Welcomed to the 'Fest
Location: Annandale, New Jersey
 
Join Date: Nov 2009
Posts: 745
Mein Auto: E46 E89 F30(Msport)
The engine flush is BS. Good oil has detergent already in it and it will keep the inside of the motor clean if you change it regularly.

About the transmission - just my opinion - if flushing the trans causes a problem, it's because you had a pre-existing condtion, that being said, forcing fluid through
a high mileage trans is a bad idea. Drop the pan and change the fluid.
__________________
Reply With Quote
  #5  
Old 09-19-2012, 10:59 AM
Fast Bob's Avatar
Fast Bob Fast Bob is offline
Keeping it surreal
Location: Here, there, everywhere....
 
Join Date: Jun 2004
Posts: 34,613
Mein Auto: 2004 330Ci ZHP 3 pedals
Agree with charlesberry....a simple "drain and refill" is the best path for a trans. While this method only gets out around 60% or so of the old fluid (it really needs to be done twice in close proximity for maximum effectiveness), you don`t have the potential disasters brought on by a more agressive "power flush".
__________________
The road goes ever onward....
(R.I.P. Jever)

*Please support the Wounded Warrior Project*

When faced with choosing between two evils, always go with the one you`ve never tried before....
Reply With Quote
  #6  
Old 09-19-2012, 11:08 AM
MalibuMafiaV's Avatar
MalibuMafiaV MalibuMafiaV is offline
L4P
Location: Malibu, CA
 
Join Date: Jul 2005
Posts: 11,552
Send a message via AIM to MalibuMafiaV
Mein Auto: E60 M5 & Stage 3 Audi S4
But if his trans already has over 100k miles on it and it's an auto... there's no point in changing the fluid. It'll most likely cause problems imo.
__________________
http://www.luxury4play.com
BMW 2006 M5 - REALLY LOUD
Audi S4 2000 Stage 3 - Dat turbo spool
BMW 2000 3-series - Supercharged Because race car SOLD
Maserati 2004 M128 GT - HREs/tint/straight piped SOLD
BMW 2006 M3 - stock - SOLD
Reply With Quote
  #7  
Old 09-19-2012, 12:30 PM
charlesberry's Avatar
charlesberry charlesberry is offline
Officially Welcomed to the 'Fest
Location: Annandale, New Jersey
 
Join Date: Nov 2009
Posts: 745
Mein Auto: E46 E89 F30(Msport)
Should you choose to do this.

http://www.ecstuning.com/BMW-E39-530...3/Video110-HD/

The correct type of fluid to be used is of great debate, so choose carefully.
But on to more practical information - I did my first change at 100k, and a second one at 150k. I dropped the pan and refilled.
__________________
Reply With Quote
  #8  
Old 09-19-2012, 02:05 PM
Fast Bob's Avatar
Fast Bob Fast Bob is offline
Keeping it surreal
Location: Here, there, everywhere....
 
Join Date: Jun 2004
Posts: 34,613
Mein Auto: 2004 330Ci ZHP 3 pedals
Quote:
Originally Posted by MalibuMafiaV View Post
But if his trans already has over 100k miles on it and it's an auto... there's no point in changing the fluid. It'll most likely cause problems imo.
A simple "gravity-drain and replacement" is unlikely to cause any damage *as long as you use a compatible ATF* having similar coeffieicent-of-friction properties to the original juice. Dexron VI is backward-compatible with all previous versions, if you`re fortunate enough to have a GM-built unit.

Here`s a typical DIY video:

__________________
The road goes ever onward....
(R.I.P. Jever)

*Please support the Wounded Warrior Project*

When faced with choosing between two evils, always go with the one you`ve never tried before....
Reply With Quote
  #9  
Old 09-19-2012, 06:13 PM
Scott ZHP's Avatar
Scott ZHP Scott ZHP is offline
We want the Lion!
Location: PA, USA
 
Join Date: Jul 2003
Posts: 7,555
Mein Auto: 03 ZHP, 01 X5, 73 MGB
While you have the pan off, CLEAN THE INSIDE OF THE PAN and replace the filter. You'll be surprised at the amount of sludge/crud on the bottom of the pan. Clean the magnets as well.
When replacing the filter, make sure that the sealing rings on the inlet of the old filter do not get stuck in the valve body of the transmission. They tend to stick when you pull the old filter off.
Do a search and you'll see what I'm talking about.
__________________


Quote:
Originally Posted by Fast Bob View Post
JUST...LOOK...UNDER...THE...CAR....for Chrissakes....it`s like checking to see if a dog is male or female....
Quote:
Originally Posted by smolck View Post
A bimmer with forced induction should have a proper manual gearbox. Anything less is like french kissing your sister.
Reply With Quote
  #10  
Old 09-20-2012, 04:37 AM
jonathan2263's Avatar
jonathan2263 jonathan2263 is offline
Cogito Ergo Zoom
Location: Far Hills , NJ
 
Join Date: Dec 2008
Posts: 3,500
Mein Auto: 325iT
If there are women in the house, then you MUST always flush.
__________________


http://www.facebook.com/home.php?sk=...?id=1338939628
"I May Be Going To Hell In A Bucket But At Least I'm Enjoying The Ride"
Reply With Quote
  #11  
Old 09-20-2012, 12:59 PM
j_schroeder's Avatar
j_schroeder j_schroeder is offline
Officially Welcomed to the 'Fest
Location: michigan
 
Join Date: Dec 2011
Posts: 195
Mein Auto: 330ci
I did a filter/fluid change on my ZF trans at apx. 118k with redlines atf and I'm at 128k now with no problems. I will be changing the fluid only in like 5-10k just to get more old fluid out. My trans responded very well to new fluid, shifts are butter smooth.

Sent from my DROID2 using Bimmer App
__________________

2001 330CI
Reply With Quote
  #12  
Old 09-20-2012, 01:07 PM
Fast Bob's Avatar
Fast Bob Fast Bob is offline
Keeping it surreal
Location: Here, there, everywhere....
 
Join Date: Jun 2004
Posts: 34,613
Mein Auto: 2004 330Ci ZHP 3 pedals
Quote:
Originally Posted by j_schroeder View Post
I did a filter/fluid change on my ZF trans at apx. 118k with redlines atf and I'm at 128k now with no problems. I will be changing the fluid only in like 5-10k just to get more old fluid out. My trans responded very well to new fluid, shifts are butter smooth.

Sent from my DROID2 using Bimmer App
Valuable bit of info right here....ZF owners should archive this for future reference....
__________________
The road goes ever onward....
(R.I.P. Jever)

*Please support the Wounded Warrior Project*

When faced with choosing between two evils, always go with the one you`ve never tried before....
Reply With Quote
  #13  
Old 09-20-2012, 01:16 PM
AUZREAL187 AUZREAL187 is offline
Auzreal750
Location: Canton,GA
 
Join Date: Sep 2012
Posts: 21
Mein Auto: All of them
On every trans job that we do we remove the valve body and clean it . Every car gets a new pan, fluid, and adapter plug.

Sent from my AT100 using App
Reply With Quote
  #14  
Old 09-20-2012, 01:21 PM
Fast Bob's Avatar
Fast Bob Fast Bob is offline
Keeping it surreal
Location: Here, there, everywhere....
 
Join Date: Jun 2004
Posts: 34,613
Mein Auto: 2004 330Ci ZHP 3 pedals
Quote:
Originally Posted by AUZREAL187 View Post
On every trans job that we do we remove the valve body and clean it
NOT recommended unless you have prior experience with auto trannies !
__________________
The road goes ever onward....
(R.I.P. Jever)

*Please support the Wounded Warrior Project*

When faced with choosing between two evils, always go with the one you`ve never tried before....
Reply With Quote
  #15  
Old 09-20-2012, 01:41 PM
AUZREAL187 AUZREAL187 is offline
Auzreal750
Location: Canton,GA
 
Join Date: Sep 2012
Posts: 21
Mein Auto: All of them
agreed! but holy cow all the nasty that I clean out. I'll try and take some pictures next time. Huge difference.
Reply With Quote
  #16  
Old 09-20-2012, 02:44 PM
Fast Bob's Avatar
Fast Bob Fast Bob is offline
Keeping it surreal
Location: Here, there, everywhere....
 
Join Date: Jun 2004
Posts: 34,613
Mein Auto: 2004 330Ci ZHP 3 pedals
Quote:
Originally Posted by AUZREAL187 View Post
agreed! but holy cow all the nasty that I clean out. I'll try and take some pictures next time. Huge difference.
Exactly why people *shouldn`t* get the power-flush treatment....blowing all that debris into all those little passages and orifices under beaucoup pressure is a BAD idea....
__________________
The road goes ever onward....
(R.I.P. Jever)

*Please support the Wounded Warrior Project*

When faced with choosing between two evils, always go with the one you`ve never tried before....
Reply With Quote
  #17  
Old 09-20-2012, 05:10 PM
bimcwe bimcwe is offline
XIL
Location: Illinois
 
Join Date: Aug 2012
Posts: 122
Mein Auto: 2002 325xi
Lots of great comments, I appreciate it. I just hit 115k and in one of my prior posts I said
Quote:
Over the last two weeks I've been finding that when my baby shifts gears, it lacks the umph that I was used to. It's more of a slight bump rather than the tug that I've grown accustomed to. Something just isn't feeling right. Any clues/ideas?
crowz responded:
Quote:
Change it with factory fluid and the filter and it should firm back up. Sounds like your having a low pressure issue and the fluid change should fix that.
Anything else I should be aware of/keep in mind while I'm doing this? I plan on replacing my plugs, and I just did an oil change last weekend. I'm considering replacing the valve cover gasket but I'm a bit apprehensive due to my inexperience.
^This upcoming week for all of this if the parts come in on time.
Reply With Quote
  #18  
Old 09-20-2012, 06:44 PM
nfsplayer2 nfsplayer2 is offline
Registered User
Location: new jersey
 
Join Date: Jul 2011
Posts: 82
Mein Auto: 2001 bmw 325i
I'm at 170k right now and thinking if I should do a transmission flush.
Reply With Quote
  #19  
Old 09-20-2012, 07:18 PM
bimcwe bimcwe is offline
XIL
Location: Illinois
 
Join Date: Aug 2012
Posts: 122
Mein Auto: 2002 325xi
Quote:
Originally Posted by nfsplayer2 View Post
I'm at 170k right now and thinking if I should do a transmission flush.
From what I've gathered so far, the more miles, the more detrimental a flush could be. I've also gathered that it's slightly scammy and does more harm than good. I'm at 115k like I said before, and I've ruled out flushing. A nice drop-pan cleansing should do it for me.
Reply With Quote
  #20  
Old 09-20-2012, 07:58 PM
Fast Bob's Avatar
Fast Bob Fast Bob is offline
Keeping it surreal
Location: Here, there, everywhere....
 
Join Date: Jun 2004
Posts: 34,613
Mein Auto: 2004 330Ci ZHP 3 pedals
Quote:
Originally Posted by nfsplayer2 View Post
I'm at 170k right now and thinking if I should do a transmission flush.
Did you read this entire thread ?

It`s important to know the difference between "a flush" and "a drain & refill"....
__________________
The road goes ever onward....
(R.I.P. Jever)

*Please support the Wounded Warrior Project*

When faced with choosing between two evils, always go with the one you`ve never tried before....
Reply With Quote
  #21  
Old 09-21-2012, 12:09 AM
GLOK1132 GLOK1132 is offline
Officially Welcomed to the 'Fest
Location: Texas
 
Join Date: Aug 2011
Posts: 176
Mein Auto: 2002 325i
I am doing a drain and refill this weekend and I'll let y'all know if my car explodes.
Reply With Quote
  #22  
Old 09-21-2012, 11:26 AM
crowz's Avatar
crowz crowz is offline
Officially Welcomed to the 'Fest
Location: Alabama
 
Join Date: Oct 2006
Posts: 4,497
Mein Auto: 2000 323i, 97 528i
Quote:
Originally Posted by bimcwe View Post
Lots of great comments, I appreciate it. I just hit 115k and in one of my prior posts I said


crowz responded:


Anything else I should be aware of/keep in mind while I'm doing this? I plan on replacing my plugs, and I just did an oil change last weekend. I'm considering replacing the valve cover gasket but I'm a bit apprehensive due to my inexperience.
^This upcoming week for all of this if the parts come in on time.
If its in the budget Id change the plugs and the coil packs. I have spent so much on mine lately when I do my plugs I may skip the packs this time around but its in general not a bad idea to change them too.
Reply With Quote
  #23  
Old 09-21-2012, 11:30 AM
crowz's Avatar
crowz crowz is offline
Officially Welcomed to the 'Fest
Location: Alabama
 
Join Date: Oct 2006
Posts: 4,497
Mein Auto: 2000 323i, 97 528i
I didnt bother chiming in since it seemed most were on the right track knowing flushing is bad. But some seem to be considering the flushing so I figured Id comment on it.

Flush = evil.

Doesnt matter what the mileage is its a BAD idea. Most shops the do a flush actually filter the fluid they are sending thru and dont change the machines tank's fluid till it "looks bad". So not only are you dislodging crap and sending it thru your trans your also receiving other peoples crappy fluid into your trans. Some bits of someone's grand am is being sent thru your bmw's transmission. If this doesnt bother you I give up......
Reply With Quote
  #24  
Old 09-21-2012, 12:06 PM
Fast Bob's Avatar
Fast Bob Fast Bob is offline
Keeping it surreal
Location: Here, there, everywhere....
 
Join Date: Jun 2004
Posts: 34,613
Mein Auto: 2004 330Ci ZHP 3 pedals
Quote:
Originally Posted by crowz View Post
If its in the budget Id change the plugs and the coil packs. I have spent so much on mine lately when I do my plugs I may skip the packs this time around but its in general not a bad idea to change them too.
Changing coils just for the sake of changing them is a waste of time & money....they either work, or they don`t (like light bulbs). If they`re working, leave `em alone....
__________________
The road goes ever onward....
(R.I.P. Jever)

*Please support the Wounded Warrior Project*

When faced with choosing between two evils, always go with the one you`ve never tried before....
Reply With Quote
  #25  
Old 09-23-2012, 05:41 PM
GLOK1132 GLOK1132 is offline
Officially Welcomed to the 'Fest
Location: Texas
 
Join Date: Aug 2011
Posts: 176
Mein Auto: 2002 325i
I just did a drain and refill on my 02 325i and everything is running fine. Can't say as I can feel a difference in the way the car shifts but it is driving perfectly. All I need to do now is fix my warped brake rotor.
Reply With Quote
Reply

Bookmarks


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E46 (1999 - 2006)
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 11:01 PM.


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