transmission flush at home question - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Wrangler Forums > JK Wrangler Technical Forum > transmission flush at home question

FS: Wranger BRIGHT License Plate LED! Just $3! Great valueIntroducing MONSTALINER™ UV Permanent DIY Roll On Bed LineFS: Jeep Fog Light LED Bulbs! Several Brightness Options!

Reply
Unread 10-11-2015, 01:26 PM   #1
stumppc
Registered User
 
Join Date: Oct 2015
Posts: 2
transmission flush at home question

I plan on changing as much transmission fluid as I can at home on my wife's Jeep. Going to drop the pan, change filter, and install a drain plug. I also plan on trying a DIY transmission flush after that. I've read on this forum about a procedure where you unhook the transmission cooler line, start the jeep, and allow the fluid to pump out while you fill the jeep with ATF4 simultaneously.

Would there be anything wrong with just letting the fluid pump out and refilling it afterwards? I'd fill a bucket that measures the amount pumped out, so I can be sure to fill it with as much as came out.

The perfectionist in me says I need to try and get as much of the old fluid out that I can...

refer to this thread about flush: http://www.jeepforum.com/forum/f96/d...-flush-941569/

stumppc is offline   Reply With Quote Quick reply to this message
Unread 10-11-2015, 05:58 PM   #2
ronjenx
Web Wheeler
 
ronjenx's Avatar
2008 JK Wrangler 
 
Join Date: Jan 2009
Location: Maine
Posts: 4,478
How many miles on the Jeep? Has it had a trans fluid/filter service before? If yes, how many miles ago?
__________________
2008 JKU Rubicon
42RLE Auto
ronjenx is offline   Reply With Quote Quick reply to this message
Unread 10-11-2015, 06:43 PM   #3
SoK66
Registered User
2009 JK Wrangler 
 
Join Date: Jul 2011
Location: Durango, CO
Posts: 1,410
This is more easily done if you have an aftermarket cooler where you can detach the return line. Remove the line from the cooler and put a plug in it. Run a length of tubing from the open port on the cooler into a clear container precisely marked at 2 quarts. Run the engine until the fluid pumped into the container reaches the mark, shut it off. Add two quarts, repeat 7 times. The trans system holds a bit over 13 quarts, so the routine I'm describing will replace virtually all the existing fluid.

The reason you have to stop at two quarts, the trans pump will quit moving fluid at just a bit more that that.
__________________
Jeeps: Where my 401(k) went to die!
SoK66 is offline   Reply With Quote Quick reply to this message
Unread 10-12-2015, 10:00 AM   #4
duneslider
Registered User
2007 JK Wrangler 
 
Join Date: Jun 2013
Location: Riverton, Utah
Posts: 1,594
Quote:
Originally Posted by SoK66 View Post
This is more easily done if you have an aftermarket cooler where you can detach the return line. Remove the line from the cooler and put a plug in it. Run a length of tubing from the open port on the cooler into a clear container precisely marked at 2 quarts. Run the engine until the fluid pumped into the container reaches the mark, shut it off. Add two quarts, repeat 7 times. The trans system holds a bit over 13 quarts, so the routine I'm describing will replace virtually all the existing fluid.

The reason you have to stop at two quarts, the trans pump will quit moving fluid at just a bit more that that.
This is how I have done it, twice now. Considering I am at 108k I probably should do it again, not to mention drop the pan and replace the filter again.

Since we are talking transmission service, anything else that should be done to an auto trans that I am not doing with changing fluids and filters? Should I take it to a professional transmission place for a more thorough service?
duneslider is offline   Reply With Quote Quick reply to this message
Unread 10-12-2015, 10:07 AM   #5
SoK66
Registered User
2009 JK Wrangler 
 
Join Date: Jul 2011
Location: Durango, CO
Posts: 1,410
Not really much else to do. Droppping the pan and replacing the filter regularly is just a wise precaution. Inspect the pan for unusual stuff that shouldn't be laying there. In general the ATF+4 Mopar uses is stinky stuff that smells burned in the bottle. I flushed mine the first time using the above because I'd run the JK a year since new with no auxiliary trans cooler and the chime had come on a few times. (Later upgraded via the "Hot Oil" light recall.) Figured it would be a good idea to refresh the fluid when I installed the cooler. Repeated again a couple years later.
__________________
Jeeps: Where my 401(k) went to die!
SoK66 is offline   Reply With Quote Quick reply to this message
Unread 10-12-2015, 10:18 AM   #6
Amtrack
Registered User
2015 JK Wrangler 
 
Join Date: Jul 2015
Location: , Upstate NY
Posts: 202
In the "good old days" torque converters also had a drain plug to ensure the old and burnt oil was drained out.
Amtrack is offline   Reply With Quote Quick reply to this message
Unread 10-12-2015, 10:26 AM   #7
SoK66
Registered User
2009 JK Wrangler 
 
Join Date: Jul 2011
Location: Durango, CO
Posts: 1,410
Indeed. The process I mentioned above was called a "hillbilly trans flush" by one of the first guys I ever worked for. The point being that dropping the pan didn't get the old stuff out of the torque converter and transmission cooler. The downside is, of course, that you're mixing new fluid with old and there's quite a bit of a diminised return until you've gotten well along in the process.
__________________
Jeeps: Where my 401(k) went to die!
SoK66 is offline   Reply With Quote Quick reply to this message
Unread 10-13-2015, 10:10 AM   #8
motoguy1251
Registered User
2012 JK Wrangler 
 
Join Date: Oct 2012
Location: Big Rapids, Michigan
Posts: 296
Great reminder, I need to do my manual transmission and transfer case.
motoguy1251 is offline   Reply With Quote Quick reply to this message
Unread 10-13-2015, 12:28 PM   #9
stumppc
Registered User
 
Join Date: Oct 2015
Posts: 2
Thanks for the input. I am calling this the '2 quart at a time' tranny flush then. My wife's jeep is overdue at 74k miles, but at least it is just used as a mall crawler. I plan on coming up with some kind of pluming fixture then to make this procedure easier in the future.
stumppc is offline   Reply With Quote Quick reply to this message
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.

Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.


Thread Tools






Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.