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Lucas stops slips....even got rid of the lurching when, in a desperate moment, I dumped dextron in my chrysler. Ran 100k miles more without flushing. I'll run ATF for an oil change through a dirty...

I've heard really great things about this, however, maybe some controls in your experiments would do well.

Run a tank without it, see if the effects last.

Maybe try it on another vehicle...