Heavy duty auto transmission cooler - BMW Forum - BimmerWerkz.com
BMW Forum BMW Forum

Auto Insurance

» Featured Product
Wheel & Tire Center

Go Back   BMW Forum - BimmerWerkz.com > BMW Model Specific Forums > 1,6,7,8 - Series and Mini Cooper
Register Home Forum Active Topics Gallery / Showroom Auto Loans Garage Search Today's Posts Mark Forums Read Auto EscrowInsurance

1,6,7,8 - Series and Mini Cooper General Chat related to models that do not fit into particular categories above. Please try to put your discussion in more appropriate sections. This section does cover the 1 Series, MINI Cooper and 8-Series vehicles: BMW 830i, BMW 840Ci, BMW 850i, BMW 850Ci, BMW 850CSi, M8, Alpina B12, BMW CS Concept and others.

BimmerWerkz.com is the premier BMW Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 06-25-2011, 07:18 PM   #1 (permalink)
42, The meaning of life
 
brettski's Avatar
 
Join Date: Jul 2009
Location: Melbourne, Australia
Car: 2000 740iL Individual
Posts: 2,405
Photos:
brettski is just really nicebrettski is just really nicebrettski is just really nicebrettski is just really nicebrettski is just really nice
Heavy duty auto transmission cooler

Sometimes my auto gearbox will hold onto gears a lot longer than it would normally, and it actively resists my attempts of changing up manually, this occurs in either of the following two scenarios:
a) If I have been doing highway / freeway speeds (110km/h) for a period of time in excess of 30 minutes, then drop back into stationary or slower traffic (60 - 80km/h).
b) Sit in stationary or near stop start traffic for longer than 15 - 20 minutes.
The only way to recover from this symptom (that I have found to date) is to stop for 15-20 minutes.

The gearbox has been serviced ~ 15,000 km ago, and the Auto specialist shop didn't find any issues mechanically or diagnostically. That service did actually resolve some seemingly unrelated performance issues with the low speed cruising rev stability, but this issue has persisted.

Has anyone else encountered this issue?

I suspect that it is heat related so I am thinking about trying a heavy duty transmission cooler similar to Universal SuperCooler rated at 29,200 BTU 11"x11"x1-1/2" or Hi-Tek Automatic Transmission Cooling System 13-1/2"x9"x3-1/2" with 9-1/2" diameter fan

Anyone got any thoughts, suggestions or other recommendations to offer me?
__________________

Riding in style
brettski is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 06-26-2011, 06:46 AM   #2 (permalink)
Captain... Savvy ?
 
Jack Dabsy's Avatar
 
Join Date: Apr 2011
Location: Barnsley UK
Car: BMW E38 728i 1996 Met Black
Posts: 2,194
Photos:
Jack Dabsy will become famous soon enough
Garage
Keep it simple first, Brett...
Why not try forcing more air thru the stock cooler? Maybe fit an elec fan or even encase it at the sides so air is directed to it more...
Gotta be worth a try before you spend silly money?
DAZ
__________________

Eso es todo!
Please press the "REP" button if you are happy with your response/answer...

Please JOIN, or just have a look... Its Totally FREE...
BMW Part Market

BMW Online Manuals (TIS)

New Member ?
Jack Dabsy is offline   Reply With Quote
Old 06-26-2011, 08:08 AM   #3 (permalink)
42, The meaning of life
 
brettski's Avatar
 
Join Date: Jul 2009
Location: Melbourne, Australia
Car: 2000 740iL Individual
Posts: 2,405
Photos:
brettski is just really nicebrettski is just really nicebrettski is just really nicebrettski is just really nicebrettski is just really nice
I'll have to check what size the factory cooler is, and how I might go about mounting a fan over it. What do you suggest, just run the fan whenever the ignition is on, or some thermal control on it?
__________________

Riding in style
brettski is offline   Reply With Quote
Old 06-26-2011, 08:19 AM   #4 (permalink)
Captain... Savvy ?
 
Jack Dabsy's Avatar
 
Join Date: Apr 2011
Location: Barnsley UK
Car: BMW E38 728i 1996 Met Black
Posts: 2,194
Photos:
Jack Dabsy will become famous soon enough
Garage
I would go for extra ducting to the cooler or mount a fan with a manual switch... But you must have an issue if the stock cooler is not performing.
Is there an alternative oil you could try?
__________________

Eso es todo!
Please press the "REP" button if you are happy with your response/answer...

Please JOIN, or just have a look... Its Totally FREE...
BMW Part Market

BMW Online Manuals (TIS)

New Member ?
Jack Dabsy is offline   Reply With Quote
Old 07-19-2011, 11:33 PM   #5 (permalink)
n00b
 
Join Date: Jul 2011
Car:
Posts: 1
Photos:
tonslawed is on a distinguished road
If I had the same problem it means I have to first fix the stock cooler problem?
tonslawed is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

  BMW Forum - BimmerWerkz.com > BMW Model Specific Forums > 1,6,7,8 - Series and Mini Cooper


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Transmission cooler Thermostat? Laker 3-Series (E36) 5 02-27-2009 01:36 PM
How easy is it to convert my e34 525i auto transmission to a manual transmission? fonker2889 5-Series (E12,E28, E34, E39, E60) 8 08-23-2008 12:37 AM
Leaking transmission cooler Laker 3-Series (E36) 3 10-19-2005 11:05 AM
Auto Transmission zibby 3-Series (E46, E90) 1 12-13-2004 11:20 PM

Powered by vBadvanced CMPS v3.2.2

All times are GMT -5. The time now is 08:41 AM.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.3.2
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.