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People have argued that a flush can break loose stuff and make a situation worse but I have proven to many clients that not true at all EXCEPT when someone either short cuts the process or does it wrong. ( I often have to repeat several times for large systems and even do a cleaning fluid flush then purge) In a system where there is significant contamination, sludge, varnish and even pockets of accumulation- a flush will remove this a lot better than a drain. There's only one advantage and significant difference between a drain/fill versus a "machine"(power) flush- the machine has a much faster velocity of liquid and can recirculate. Other than the labor involved and possibly clean up. This is from flushing industrial hydraulic systems but the concepts are virtually identical. Maybe the modern cars are totally fine with using a machine? I do see a benefit using a machine since you get completely fresh fluid but what are the cons?
#FLUID VS FLOTATO FULL#
To me it seems like true car enthusiasts that like to do their own maintenance strongly discourage using a ATF machine to do a full flush while mechanics / shop owners say using a machine is totally fine and most shops do a full flush with a machine. I was always taught that drain and fill is the only (safe/best) way to change ATF fluid and to avoid using a macing to do a full flush. What is the verdict nowadays between ATF flush using a machine vs drain and fill.
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