If you're interested in upgrading the torque converter in a GM 6L80 or 6L90 transmission, watch this video. You'll learn about the critical weak points of the stocksize, 300mm units and the difference between performance and heavyduty converter upgrades. To understand options for good/better/best builds, you'll get a closeup look at key components like the front cover, piston and clutch plates, plus unique features of Sonnax multiplate performance converter kits — the ultimate way to maximize reliability in JMBX, JMBV, JMDZ and JMDY coded units.

For a quick overview of build options, check out this guide: https://www.sonnax.com/tech_resources...