View Full Version : vacuum modulation upgrade

03-29-2006, 07:32 PM
Likes and dislikes....... Im in the process of rebuilding my 4l60e and dont know if its worth the 100 bucks for the upgrade. What do you guys think?

03-30-2006, 12:34 AM
It offers, quicker (no delay) downshifts, firmer WOT 2-3 shift, responds to throttle changes immediately (no delay) in terms of line pressure response. I use these in "all" my performance builds.