For several years now, manufacturers have been moving away from using dipsticks in automatic transmissions — and why wouldn’t they? The more they make things difficult to service by the end user, the better for them. So what is a dipstick and why do you need one? A transmission dipstick serves the same purpose as an oil dipstick, usually made from metal or plastic and housed inside a dipstick tube that runs down to the transmission. Most have a handle or ring to pull it up out of the transmission in order to check not only the level of fluid,...

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