JEGS 603212 GM 4L60E Servo Upgrade Assembly Corvette-Style Fits All 4L60E Transm

I was skeptical after watching the YouTube videos on if this would actually make a difference but it does. Very positive shifts all the way up and down and will actually hold 3rd on hills now rather than hunting between 3rd and 4th. At 180k on the trans it feels like a whole new truck again. Very easy to install, comes with a new snap ring and O ring, there’s plenty of videos on YouTube on how to do the swap with minimal tools. I’ve put about 10k on with it installed and I am pleased. No leaks or slipping, trans temps stay low. If your trans is feeling tired and sluggish this will wake it back up.