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Transmission fluid change-which method is better? ![]()

99 messages, Last post on Jul 10, 2002 at 6:37 AM
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I saw a ad for a commercial tranny flush system and they sold the flusing fluid for so much per 5 gallon container. Wonder how much of that "solvent" remains behind. Also what does it do to the clutches and seals in trannies. Think it is probably a very risky operation. Several people I know have said to completely change the ATF, disconnect the ATF line to the ATF cooler and divert it with a flexible tube to a large clear container, start the engine and fill at the same rate as the drain container fills. Sounds like a keystone cops maneuver but it might work. |
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| another way to get that done if you figure on doing it more than once a life is to fasten a matching pipe fitting and tube to a bucket (braze to a galvanized pail??) and fill that with new tranny fluid of the proper variety. you will have to have somebody to yell at you to > STOP! < before the bucket goes empty. I have not tried this, and probably won't. | |
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The line to disconnect is the return (upper) line from the cooler at the trans. This cleans out the cooler as well. Regarding elaborate schemes re brazed fittings on buckets, etc, to refill the trans, forget it. Pump suction is from the lower sump in the trans, which coincidentally is where the filter is usually located, not from a cooler line. |
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I like the just drain it method. lots of chances to disturb dirt or do something wrong with the filter change method. |
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