The 4L80E Transmission: Heavy-Duty Guide & Upgrades
The 4L80E transmission is GM’s heavy-duty four-speed. Learn what it fits, why it’s a popular upgrade, and the builds that handle serious power.
6L80E & 6L90E Transmissions: The Complete Guide
A complete guide to the 6L80E and 6L90E transmissions: what they fit, common problems, and the performance upgrades that make them hold power.
The 700R4 Transmission: Guide, Swaps & Performance Upgrades
The 700R4 transmission explained: what it fits, why it’s a popular swap, its common weak points, and the upgrades that make it bulletproof.
4L60E Transmission: Guide, Upgrades & Problems
Everything you need to know about the 4L60E transmission: what it fits, its common problems, and the upgrades that make it hold serious power.