It was a very good investment for me. I also put in a heavy duty shift kit when i had the corvette servo put in. I even replaced the plastic accumulator piston that comes in the 4L60E transmissions. These are what can shatter and destroy the trani. After i got the nelson tune on the truck is now chirps the tires when it shifts from 1st to 2nd under heavy acceleration. I even have 10" wide tires on the rear.