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Maintenance & Repair Maintenance & Repair - Archived Discussions Transmission fluid change-which method is better? 
99 messages, Last post on Jul 10, 2002 at 6:37 AM
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| I have used synthetic ATF in a Chev Corsica, Isuzu Rodeo, Toyota Camry, Mercury Mystique, Buick Regal and change every 30,000. Camry has 145,000. No transmission problems on any of them. Who knows, could be luck. | |
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armtdm, how do you change fluid in the Mistique? If it was a 4 cyl., it had the CD4E, with no pan, no drain plug, no nothing... G. |
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| 4 cyl Zetec engine. Yes, it has a drain plug just back of mid center on the vertical transmission housing. There is no pan but the tranny has a drain plug. Done it several times now. Gets about 3.4-4 quarts out. | |
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armtdm, I checked, and your Mystique has the same tranny my 626 has. I'll jack up the car this weekend and check for the drain plug where you mentioned. Hopefully there is one in mine too, but maybe it was an improvement from 95 to 96 and mine will lack it (I'm a strong believer in Murphy's laws...). I'm getting 2.5-3 quarts through the dipstick, but it would be nicer to let it drain to remove all the crud out... G. |
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I have a 1995 GMC Jimmy with 157,000 miles. I had the transmission fluid checked and it looked REALLY dirty. However, the truck is running fine, no slipping, no leaks or hesitation that I can tell. You want believe this, but I can't remember ever having the transmission fluid completely flushed, only drained from the pan and a new filter and I can't remember when that was done. Bad memory!! Can I have the whole system flushed with new fluid or will this start to cause problems since I have so many miles on the truck and the fact I can't remember when anything was done to the trans fluid? Please Advise!!!!! |
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| I would do at least two drain and fills maybe 100 miles apart. the flush may be too stressful and cause problems at this stage | |
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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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