A few months back we detailed the buildup and testing of our street 4L60E trans with help from our trans man Jimmy Galante and parts from Sonnax and TCI Automotive. But that was only half the battle.

Cheap turbo + junkyard LS = big power. The formula has been proven multiple times. However, significant power won't last long with a junkyard transmission. Thanks to the aftermarket, there are several ...

The SEMA show will see the release of a new aftermarket component from TCI Automotive, the 4X Transmission Bellhousing Adapter and Flexplate Kit enabling installation of a GM 4L60E transmission in a ...

Upgrading an FE engine to modern performance expectations is easy to do, as we've proven in the past couple issues with our Formidable FE build series. We managed to build a bulletproof engine that ...

Rebuild parts are plentiful, and many local transmission shops are comfortable overhauling them, which can make a refreshed 4L60E an attractive option for a daily-driven Silverado or Tahoe that will ...

There’s lots of talk about making horsepower these days. Sure, this is the golden age of horsepower but all that power does little good if the transmission fails to deliver the power to the tires.

General Motors' 4L60-E automatic transmission is one of the most popular transmissions ever built. It was initially designed to replace and modernize GM's older Turbo 700R4 — also known as the ...