How Does An Automatic Transmission Know When to Change Gears?

Posted by on Thursday, January 15th, 2015

An automatic transmission is an integral part of your car. Image source: Wikimedia Commons

Ever wonder how an automatic transmission “knows” when to change gears? Scroll to learn more.
Image source: Wikimedia Commons

By this point in your automotive career, you’ve probably figured out how the engine sends power to the transmission. But you still may be wondering:  how does an automatic gear know when to change gears? That’s a good question, and one that we’ll be discussing below.

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Lower The Quarter Miles Times In Your 4L60E Equipped Z28 Camaro

Posted by on Wednesday, November 26th, 2014

The 4L60E is a modern four-speed automatic transmission built and designed by the General Motor Corporation. It comes from a a family of transmissions that include the 4L60, 4L60E and 4L65E. All these transmissions are heavily based on a modified version of GM’s first automatic overdrive transmission, the 700R4, which itself is based on the much earlier TH350 three speed transmission. Th 4L60E first saw production in 1993 (in the GMC Vandura and GMC Jimmy) and was eventually taken out of use at the end of the 2008 model year (last used in the Chevrolet Avalanche). The 4L60E is equipped with a perfect first gear ratio of 3.059:1 and a very sweet over drive ratio of 0.7:1 (30% over driven).  The result is good off-the-line performance combined with better gas mileage. The 4L60E automatic transmission could be found in almost every GM car of the time period, including the Sonoma, the Holden Caprice, the Pontiac GTO, the Chevrolet Impala SS, the Chevy Corvette and the GMC Safari van. It could also be found in the Z28 Camaro.

The Z28 Camaro came wit the 4L60E transmission


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