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  #1  
Old 07-07-2013, 09:21 AM
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Transmission Fluid Leak

A few weeks ago I noticed some fluid beneath my 2007 WK Hemi. Upon inspecting it further, I determined it was transmission fluid. I took it to a reputable transmission repair shop who replaced the pan gasket and fluid. Now three weeks after the service, I am still having a few droplets of fluid on my garage floor. I did some research and from what I understand, the O-rings on the transmission NAG connector have been known to cause a similar issue. Can anyone confirm that this may be possible source of the leak, or are there any other well-known problems that I should be aware of on this model?

Thank you for your help!
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Old 07-07-2013, 10:30 AM
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Where are you noticing the leak? The transmission cooler lines are a common spot for leaks to develop. For that, you would notice drops near the front passenger side.
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Old 07-07-2013, 05:50 PM
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Re: Transmission Fluid Leak

Thanks for the quick reply, Doc.

I have attached a few pictures that shows the accumulation of fluid on the transmission pan. Maybe the pictures will help in describing the issue.

I am not sure if there are any common faults among WK Hemi's that could result in a leak such as the one my transmission is currently suffering from, but if anyone could offer some input, I would greatly appreciate it!!

[IMG][/IMG]

[IMG][/IMG]

[IMG][/IMG]

Thanks!
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Old 07-07-2013, 06:28 PM
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Re: Transmission Fluid Leak

You have the 5-45RFE transmission. Originally the pan is sealed with RTV, but many use a preformed packing because it gives less hassle during installation and later during removal and cleaning. The disadvantage of the preformed packing is that it is more prone to leaks. You could try to fasten the pan bolts a bit more and see if that will solve the problem.
Last year i rebuild my transmission and the kit came with a preformed packing. Nothing but trouble, and soon i changed it for the good old RTV again.
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Old 07-08-2013, 12:30 PM
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Re: Transmission Fluid Leak

Well, the Jeep is back at the Transmission shop. I requested that they check everything again, and to seal the transmission with RTV. How do I find more information about my particular transmission? Are there any diagrams available?
Thanks for the help!!
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Old 07-08-2013, 07:54 PM
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Re: Transmission Fluid Leak

I have this same transmission on my WJ and my WJ service manual already shows quite some information on this transmission. When i needed to rebuild it last year i just bought an ATSG service manual for the 5-45RFE transmission only, which helped me a lot during the rebuild.
So now the question is, which kind of information you would like to have and how deep into the transmission you would like to dig. Most probably you can find a service manual for your year jeep with the most important information of the transmission in it. My manual at least shows hydraulic flow diagrams and some trouble shooting info.
Attached a picture of the internals of the 5-45RFE.
Attached Files
File Type: pdf 5-45RFE exploded view2.pdf (470.5 KB, 9 views)
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Old 07-08-2013, 08:11 PM
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Re: Transmission Fluid Leak

X2 on the trans cooler lines. These are known to go bad, and mine had to be replaced at about 40k miles. Not cheap to have them replaced. The trans shop should have replaced both filters when they had the pan off. If they did not, do not go back to them ! Also, if they used anything other than Mopar trans fluid, get it changed out right away.
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Old 07-08-2013, 08:49 PM
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Re: Transmission Fluid Leak

Thanks to both of you for the replies.

I think the shop will give it a thorough look this time and I have not heard that they do sloppy work in general. Maybe the trans cooler lines are a plausible cause, as was mentioned earlier.

Does anyone know if the Nag connector O-rings could be the cause?

One way or another, I have to find out what is causing the leak. A leaking transmission is simply not acceptable.

Again, thanks!
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Old 07-08-2013, 09:22 PM
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Re: Transmission Fluid Leak

Your jeep has the 5-45RFE transmission, not the NAG. A leak from the solenoid block connector is not common, eventhough not 100% impossible. No O'rings in there, but a large turret shape gasket which will not easily leak.
On the left side of the transmission are the 2 speed sensors, which also not leak that easily. At last for the left side the transmission shift lever seal.
On the right side are the oil cooler out/in connections, the line pressure sensor and the dipstick tube seal.
That the fluid sits on the aft side of the pan doesn't mean directly that it also leaks overthere. The transmission pan slightly hangs backwards, so fluid can/will easily flow to the lowest point and also during driving the airflow can take the fluid to different places.
On the front side of the transmission is the large cover plate with seals and the torque converter (with seals). Torque converter itself can leak, but there is a small drain hole in the lower bell housing, which should show any leak from the converter area.
But looking at the pictures, i would say the problem is the pan seal.
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Old 08-14-2013, 10:01 AM
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Re: Transmission Fluid Leak

Quote:
Originally Posted by dmsfun View Post
X2 on the trans cooler lines. These are known to go bad, and mine had to be replaced at about 40k miles. Not cheap to have them replaced. The trans shop should have replaced both filters when they had the pan off. If they did not, do not go back to them ! Also, if they used anything other than Mopar trans fluid, get it changed out right away.
I'm going to have to disagree here and say that as long as they used ATF+4 rated for your tranny, you'll be fine. No excessively priced Mopar ATF+4 fluid is required, just whatever says it meets that spec is fine. Now for the differentials with ELSD and the friction modifiers, that's a different story...
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