Slippage is eliminated, and so is the additional heat, by locking the converter with a hydraulically applied internal clutch. There is an increased load on the torque converter with the higher ratio provided by an overdrive Fourth gear, and some slippage takes place as a result, that slippage creates heat and that’s the enemy of an automatic transmission. In a torque converter, both fans are in a container: One is connected to the engine and the other to the transmission, and oil is involved rather than air.Īs might be expected, there is some slippage inherent with a torque converter, so many now have a lockup devise that hooks the transmission directly to the engine for increased mileage. If you say the other one would begin to turn, you’ve got the idea. For a simplistic explanation of how a torque converter works, picture what would happen if two electric fans were facing each other and one was turned on. Not only does it allow the engine to keep running while the car is stationary, but it can also provide torque multiplication when accelerating from a standstill. This is what connects the engine to the transmission. While automotive transmissions may have two, three four, or more gears, computer controls and a variety of bells and whistles, the basic internal parts remain the same-there are just more of them. To that end, we’re going to examine the basic parts of an automatic, as well as the common modifications that are made, and take a look at the GM transmissions that are commonly used. But while it may seem there is a confusing array available, like most choices that have to be made, the more informed you are the easier it is to make a decision.

and there are a number of numbers from which to choose when it comes to picking one fro a street rod. But while he names were different, the basic operation was about the same and they shared the same basic parts, Today automatics are more often identified with a number rather than a name. There was a time when automatic transmission had all kinds of unique names- Cruise-O-Matic, Hydra-Matic, Ultramatic, and the list goes on.

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