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Old 12-02-2006, 11:56 PM   #1
xbox4414
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atx transmission fluid

I've never changed the fluid of my transmission by my self. I just started doing my own oil. So I was wondering what type of transmission fluid should I use and how often do I change it? Also were exactly is the drain and place to put the new fluid in? thanks.


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Old 12-03-2006, 09:28 PM   #2
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You change it every 30,000. You drain it by dropping the transmission pan, and there will be a filter in there to change also. You buy the filter kit (it's a kit because it comes with a pan gasket and there might be an O ring involved also, I don't remember. Anyway, when you're done, you spill in about 4 (not sure of exact quantity) quarts of Mercon V (as in "5") transmission fluid thru the dipstick tube. Don't overfill it, whatever you do... Most autoparts stores can tell you the amount and type of fluid your car needs.

When you're all done you will have changed about 1/2 of the fluid in the transmission. The rest was hiding in the torque converter and valve body. You will hear much talk about "flushing", which is a procedure that changes all of it. In my opinion, if the trans works OK and is sound, flushing is a total waste of money. If the trans is soft, flushing is still a total waste of money- and can actually hasten the demise of a marginal unit.

I think you're best bet is to stick to the simple 30,000 fluid/filter change, but then make sure that you actually DO it every 30K, because it IS important to the trans.
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Old 12-03-2006, 09:32 PM   #3
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You can remove the rest of the fluid by disconnecting a cooler line and running the car.


Also, when I dropped my pan I added 4 qts (as advised on this forum) and the reading was "off the dipstick". In other words, 4 qts was way too much. 2-3 qts would have done it. So, put in two qts, check, and fill as nessecary.

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and can actually hasten the demise of a marginal unit.
How is this? The trans. is not put under any more pressure than when your car is running.
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Old 12-03-2006, 09:38 PM   #4
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Quote:
Originally Posted by Blurvfocus View Post
You change it every 30,000. You drain it by dropping the transmission pan, and there will be a filter in there to change also. You buy the filter kit (it's a kit because it comes with a pan gasket and there might be an O ring involved also, I don't remember. Anyway, when you're done, you spill in about 4 (not sure of exact quantity) quarts of Mercon V (as in "5") transmission fluid thru the dipstick tube. Don't overfill it, whatever you do... Most autoparts stores can tell you the amount and type of fluid your car needs.

When you're all done you will have changed about 1/2 of the fluid in the transmission. The rest was hiding in the torque converter and valve body. You will hear much talk about "flushing", which is a procedure that changes all of it. In my opinion, if the trans works OK and is sound, flushing is a total waste of money. If the trans is soft, flushing is still a total waste of money- and can actually hasten the demise of a marginal unit.

I think you're best bet is to stick to the simple 30,000 fluid/filter change, but then make sure that you actually DO it every 30K, because it IS important to the trans.
Are you talking about topping off the fluid thru the dipstick tube??? That seems a little absurd to me..
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Old 12-03-2006, 09:56 PM   #5
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Quote:
Originally Posted by Bubba Bob View Post
You can remove the rest of the fluid by disconnecting a cooler line and running the car.


Also, when I dropped my pan I added 4 qts (as advised on this forum) and the reading was "off the dipstick". In other words, 4 qts was way too much. 2-3 qts would have done it. So, put in two qts, check, and fill as nessecary..
Yeah, come to think of it, 2-3 qts is right. That's why I have 3 qts still sitting on my shelf here.


Quote:
How is this? The trans. is not put under any more pressure than when your car is running
The presence of new fluid is the problem. If the transmission is old and the fluid shot, deposits will have built up on everything. Now you add all that new fluid, and the detergents go to work and break all that crap loose, which clogs the filter and also gets between the clutches' friction surfaces and presto- slipping transmission. A friend of mine used to run a Cottman Transmission shop and he told me they would never do that to an old unit- they didn't want the headaches that will surely follow.
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Old 12-03-2006, 09:59 PM   #6
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durn double post.
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Old 12-03-2006, 10:00 PM   #7
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Originally Posted by Bubba Bob View Post
In that case dropping the pan and adding fluid will be harmfull also. Just maybe only half as harmfull


Quote:
Are you talking about topping off the fluid thru the dipstick tube??? That seems a little absurd to me
Is there another way?
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Old 12-03-2006, 10:06 PM   #8
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Originally Posted by InfraRedHB View Post
Are you talking about topping off the fluid thru the dipstick tube??? That seems a little absurd to me..

Not at all. That's how automatics are. But I'm told some of them don't even have dipsticks anymore. For pete's sake now what.
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Old 12-03-2006, 11:03 PM   #9
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Quote:
Originally Posted by Bubba Bob View Post
You can remove the rest of the fluid by disconnecting a cooler line and running the car.
That's the easiest way to drain the transmission before changing the filter. Be sure to disconnect the upper line at the radiator which should be the supply line. The lower line is the drain back to the trans. Have a large, deep container down there, mucho fluid will come out quickly. You will also be draining the torque converter when you start the engine to do it this way. I just can't remember how to disconnect that fitting. I think you slide the collar up, and then pull back or something.

Change the filter, your transmission will last longer with routine maintenance.



I am not worthy of talking because I have not changed my fuel filter and I have 36k miles.
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Old 12-04-2006, 07:06 AM   #10
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whynotthinkwhynot, is it safe to drain all the fluid out through the cooler line the the car running?
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