07/22/2026
Misidentifying a GM 6L-series valve body can lead to costly transmission issues, especially when factory ID markings are missing. 🧰
In this week’s Tech Tip Tuesday, Wayne Colonna, ETE’s Technical Advisor and President of ATSG, walks through the key visual differences between 6L45, 6L50, 6L80, and 6L90 valve bodies, including early vs. late designs and spacer plate variations.
Learn what to look for with:
✅ Speed sensor mounting pads
✅ Feed hole locations
✅ Exhaust ports
✅ 7-ball vs. 8-ball spacer plates
Watch the full video now and take the guesswork out of valve body identification: https://etereman.link/ValveBodyDifferences