I need a programmer and was wondering if the Hypertech Max Energy is worth it. If you can suggest another keep in mind I need one that changes rear-end gear ratios, eliminates speed limiters, and changes shift pionts(and read DTCodes preferably). I need this because when I changed the rear end gears I got lazy and didn't program it so it hit rev-limiter in 2nd and now 2nd and 4th gear don't exist. I'm pretty sure my clutches and bands are fried but I'm hoping it's something else. Any ideas?