The GM 8L90 8-speed automatic transmission was introduced by General Motors as the successor to the popular 6L80E platform. Found in vehicles from approximately 2015 and newer, the 8L90 was designed to improve fuel economy, acceleration, towing performance, and overall Read more…

If you’ve got a Duramax — a GMC Sierra HD or Chevy Silverado HD — your truck is running an Allison 1000 transmission, and it’s one of the big reasons people trust these trucks to work for a living. The Read more…

The GM 6L80E transmission has become one of General Motors’ most widely used 6-speed automatic transmissions. Introduced around 2007 and still found in some newer applications today, the 6L80E was installed in countless GM vehicles including Silverado, Sierra, Tahoe, Yukon, Read more…