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Unread 04-28-2014, 01:41 AM   #1
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Question Question - Why is tranny fluid leaking out of my vent tube?

Transmission fluid is leaking out of my transmission vent tube. Why is this? No engine code comes up when I run the obd 2 on it. I just replaced the solenoid pack in the transmission valve body today cuz I had that code. That code is now gone but the fluid is still leaking out of the vent tube. I have researched and gotten little solid, straight forward answers.
Some people said the fluid can be overheating and that's causing it. If this is so, I will install a separate transmission cooler. Could the radiator (that's supposed to be cooling the tranny fluid as well) be faulty? Could the lines being backwards cause this?
Also, could my transmission cooler lines being plugged in to the radiator backwards cause this? I had a friend replace the radiator a while ago and I don't know if the hoses were put on "right". Does it matter what the inlet/outlet is into the radiator? I've researched this too and different people have different answers.
THe car is a 2003 Chrysler 300m special with a 42le/a606 transmission. 97,000 miles.
Please respond with helpful info. I'm looking to resolve this issue a.s.a.p. Thanks a lot.

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Unread 04-28-2014, 11:28 AM   #2
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HI

The lines can attach any way on the radiator, no problems.

The first thing I would check is the fluid level. Running in Park.

If it is overfull it will spill out the vent.
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Unread 04-28-2014, 03:50 PM   #3
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Default checked fluid level

Yep. I checked the fluid with the engine at operating temp in park multiple times. Right now the dipstick reads right where it should. After replacing the solenoid pack it took 12 quarts to fill. That's obviously a lot, yet no fluid showed in the dipstick until 11 quarts. Trying to fix this thing. Somebody has to know something plz help!

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Unread 04-28-2014, 03:52 PM   #4
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Default question

Can the transmission cooler in the new radiator be bad? Should I install another desperate transmission cooler?

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Unread 04-28-2014, 04:22 PM   #5
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Quote:
Originally Posted by kmqu View Post
Can the transmission cooler in the new radiator be bad?
Not likely. You can clamp the cooler line and it won't cause any overflow.

11 qts. sounds like an awful lot of fluid for a change.

The most I've used has been about 6 qts.

Are you sure you are looking at the correct mark on the dipstick?
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Unread 06-21-2014, 08:44 PM   #6
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My friend goes to school and is learning to be a mechanic and his teacher said he recommends switching out the transmission! Wow. It only has 90k and shifts fine, there's just a pretty bad leak. So I guess this is just like a mysterious problem that no human has solved yet, or from what I hear possibly due to internal damage. So...my only real option if I go that route is pulling one from a junk yard for 125 or so and paying my friend to pop it in. I don't have 500 or better to buy one online. This really kinda stinks. Any advice or encouragement? Thanks

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Unread 06-21-2014, 09:05 PM   #7
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It took a case to fill my 4l60e after a rebuild and I also showed no fluid on the stick til the last quart. Not unusual. Is the only problem the drip?
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Unread 06-21-2014, 09:56 PM   #8
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Yea, it'll ride a little while then just pump out fluid. It's more than a slow drip. It will just intermittently start spurting out fluid. I would top it off n level it n ride it again and it would do it again.

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Unread 06-21-2014, 11:35 PM   #9
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If the level is OK, then the vent is plugged. I don't know your transmission but most domestics have a vent tube/hose. If that hose is plugged when the fluid gets hot it will purge itself out whatever way it can.

The vent will be a small hose located at the top of the transmission case.
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Unread 06-21-2014, 11:59 PM   #10
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Hmmm. Really? That's interesting and helpful. I've never heard that one before. Yea, I removed my air intake and could visibly see and touch the 12 inch long vent tube setting on top of the transmission. I watched it spit out fluid more than once and can always tell when it does because it's right above a little 3 inch in diameter and half inch deep pocket type indentation on top of the tranny. So when it would purge that little pocket area would be full.
Ok, so this is my question. How does the hose being plugged cause the fluid to purge? Is it because the purpose of the vent is air flow? So if the tranny can't vent because of blocked air flow it purges fluid? Just trying to understand. This could be wonderful news. Any more info is greatly appreciated.
Also, I saw a model like mine at the junk yard and it's vent tube was like clipped to the differential (I believe) vent tube which is like an upside down L elevated about 3 or 4 inches above the top of the tranny. Mine was and is sitting on top of the tranny with its end right next to the bottom of the other L shaped tube rather than clipped to the top of this. Could this mean anything? Maybe the hose gets hotter sitting directly on the tranny and the lack of an elevated angle makes it easier for fluid to spit or a combination of both?
If what you say is the case (hopefully), it can't be that difficult to replace the vent tube, right? It doesn't look too easy to access where it actually comes out of the tranny but I'm sure it can be done. I think I recall being able to feel it but not visually see it.
Plz give any more helpful info you can. Thanks a lot for your time and replying to my post!

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