Mar 13, 2017 · The 4L80E takes the 400’s internals and blends them with efficiency, thanks to the addition of overdrive and converter lock-up. At 8,000 pounds gross vehicle weight, the 4L80E’s capacity is greater than the smaller 4L60E’s. As a result, the 4L80E is a completely different transmission and doesn’t share anything in common with the 4L60E. Converts any 4L60e, 4L65e, or 4L70e to 4l80e, car or truck, even 97-98 LS1's! For 06-later vehicles with separate trans controllers, an 80 swap can be particularly difficult with the older style harness. Previous in Neutral Switches: Next in Neutral Switches >> Competitor's Price: This Kit Repairs Damaged External Plugs going to the MLPS Otherwise know as neutral safety switch harness repair kit 4L60E Models to , and 4L80E Models.4L80E Neutral safety switch connectors - LS1TECH - Camaro and Firebird Forum Discussion4L60E Trans wiring - LS1TECH ... Despite its name, the 4L80E is not an upgrade to its GM counterparts. Introduced alongside the original 4L60 in the early 1990's the 4L80E was designed for large trucks and is designed as a heavy duty unit, rather than a transmission for smaller cars or even some pickups.