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Unread 07-27-2013, 11:20 AM   #1
islandsnow
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2001 XJ Cherokee 
 
Join Date: Feb 2012
Location: Birmingham, Al
Posts: 39
Do I already have a tranny cooler?

I have a 01 XJ Sport 4x2 and will soon be towing a cargo trailer 1,300 miles at highway speeds full of stuff from my studio apartment.

After reading a few posts, you all suggest getting an aux transmission cooler when towing long distances as well as to compensate for the additional weight.

After inspecting under the hood it looks like I have one already. Can you look at the pictures and confirm?

If so, I'm guessing it needs a flush. Im at 189k miles.

Also do you suggest flushing the rear diff because of the long distance and weight? I only have 2WD.









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Unread 07-27-2013, 11:31 AM   #2
jeepkid03
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That is the A/C condenser. If you do lots of towing, I recommend running 75w140 synthetic gear oil in the rear differential. Changing it is a good idea if it is original.

As for the transmission, adding a cooler is a great idea and will certainly help your transmission last longer. Heat is the #1 killer of automatic transmissions.

Here is the one I have installed on my Jeep:

http://www.jegs.com/i/B-M/130/70268/...rentProductId=


I don't think you need to flush the transmission. In fact, some people have had issues with flushing the transmission at such a high mileage. Some of those "power flushes" can hurt the transmission internally. I personally have never experienced it, but I wouldn't risk it.

A simple drain and fill of the transmission is much cheaper and very beneficial to your transmission. Make sure and use Dex II/III compatible fluid. I buy mine from Autozone and it is branded as Autozone Dex/Merc, even though it is made by Coastal.

Each time you drain the transmission fluid through the drain plug in the pan, you drain out about 3 quarts. Add 3 more quarts of new fluid, and do this 3 times total. This should give you about 95% new fluid and will extend the life of your transmission.


Also, make sure when you are towing to use the "3" gear selection on the shifter. This causes the transmission to not shift as often and generate less heat.
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Unread 07-27-2013, 11:54 AM   #3
islandsnow
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Location: Birmingham, Al
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lol! ah the a/c condenser, thanks for the clarification and tips.

$59 is not a bad price... Where did you mount your cooler?
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Unread 07-29-2013, 08:35 AM   #4
jeepkid03
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Quote:
Originally Posted by islandsnow View Post
lol! ah the a/c condenser, thanks for the clarification and tips.

$59 is not a bad price... Where did you mount your cooler?
Sorry for the late reply. That kit I linked comes with most everything needed for the install.

In addition to that I bought 4 hose clamps and two 3/8" hose adapters that look like this from sears:


That way I could use them to splice the trans cooler into the soft lines for the transmission.

I mounted my cooler like this (not my jeep):



Here is a good thread that explains how to install a transmission cooler on a Cherokee:

http://www.jeepforum.com/forum/f11/t...ll-xj-1059224/

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My 0331 Head Swap How-To Thread:
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http://www.jeepforum.com/forum/f22/m...build-1119997/
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