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used AutoRx in engine, followed instructions, but did not notice any difference, as my engine was already clean with 160k miles.
then used it in auto transmission, following instructions. The transmission now shifts Sooooo much smoother, especially from 1st to 2nd and again into overdrive; its almost seamless. There is also a big improvement in the other gears. I am very pleased with the results; a bit pricey, I know, but hopefully it will extend the life of the car.
hope someone finds this helpful
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