How Transmissions are Made.

This is a great five minute breakdown on how a transmission works.  The transmission shown in the clip is called a 4T45E.  The 4T45E comes in several, light duty GM and Saturn, front wheel drive passenger cars. 

The factory assembly of the unit as seen here, is the only time that the transmission will be new.  Even if the transmission fails under warranty, the dealerships will either repair the existing transmission in the vehicle, or swap it out with a factory remanufactured transmission.  Remanufactured transmissions, commonly called remans, are built just as they would be in a Peoples Transmission Certified shop.  The transmission is removed from the vehicle, dismantled completely (even more than what this video shows), damaged or worn parts are replaced with new, rebuilt, or used parts, cleaned, then reassembled. 

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