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Shift Pointers

Long life with carefree performance is something every transmission-repair facility expects to have with transmission fluid. And at one time it was easy and carefree; now we are seeing more and more manufacturers requiring specific fluids for their transmissions. Why? In my opinion, this is half marketing, half technology. Let me explain: When automatic transmissions started to become common and popular in the late 1940s, many of the deficiencies of earlier fluids (straight mineral oils, mainly engine oil) showed that fluids used in automatic transmissions had to perform many demanding tasks that were beyond the capabilities of the available oils of the time.

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