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What is a semi truck? A semi truck is a powered truck with a trailer attached to the back. In North America, they are also known as 18-wheelers, big rigs, and tractor-trailers. While they look similar, semi-trucks are much bigger and harder to drive than a standard car. They also use more complicated technology than …

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There are several causes of why your truck is shifting hard. Your transmission fluid might be dirty and old. It could be leaking or clogged. You can also find a leak in the transmission fluid by observing the color of the transmission fluid. Transaxle fluid should be transparent or reddish. A low level of transmission …

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