Yeah i was reading testimonials on their website and they were saying that they helped with 4-2 and 3-1 gears shift. Which Ive noticed on mine that sometimes when i put my foot down it will hit another gear before it hits the power gear. But it could just be my trannys a little wore but it doesnt slip. I dont know the only other auto i have drove in a long time is my explorer but its tranny has slipped and jerked since i bought w/ 20k on it and its still going 100,000 miles later