The Superchips tuning on my 4.7 L. did clean up the slow shifts in my 5 speed transmission but still not to the point of what I'd call "crisp shifts". Being the past owner of multiple performance cars made by Ford (Mustang GT, Taurus SHO), Chevrolet (2 Z-28's) & Buick (turbocharged Grand National) I've used regular Trick Shift in all of my automatic transmissions in the past (including the 4 speed in my 2000 Cherokee 4.0 L), with much success I might add. After realizing that my new tuning on my '08 Commander still isn't taking me to the level that I'd like I started to research other ways to bump up the pressure in my trans. in order to get a quicker shift (especially the 1 - 2 shift). After reading about solenoids and pressure and some of the "tricks" that a few people are posting online I got to thinking maybe I'd just leave mine alone and learn to be happy with what increase the new tuning has given me. Then I remembered Trick Shift. After some confusing reads about why not to use regular Trick Shift on any post 1993 trans. I started to run into postings talking about the success electronic transmissions were having using the newer Synthetic Trick Shift. I decided to go ahead and do this so I bought a bottle from Jeg's (one of many online retailers who stock it for the same price of $7.99 a quart), I chose Jeg's because they are here in Ohio and I knew the shipping would be fast. A friend and I vacuumed out as much of the ATF+4 last night as possible (roughly 5 1/2 qt.) and replaced the fluid with a quart of Synthetic Trick Shift with the rest new ATF+4. The newer Trick Shift is now blue (instead of clear like the older stuff) and I was almost a little hesitant to pour it in, but I am glad that I did. After a cruise around town my trans. is shifting a small amount faster (subjective I know because I cannot actually tell you how much faster) so it seems to have been a successful upgrade. I am driving to Columbus tomorrow so I'll get a good 40 mile highway ride there and back as a test too. I'll repost if I have any issues from doing this, but as for now its a success. Since a faster shift means less internal heat due to friction I would anticipate this to also be good for the longevity of my trans. Since I've never had trouble from any transmission in the past (while also using this product) I really don't anticipate anything but good shifts to come outta this change, and now I also have the piece of mind knowing that my stock fluid has been changed out way before the recommended service period is due for my '08.