Tf727 servo questions

The SK TFSC it is a minor kit to improve shifts. It is not a performance kit, and before I took the word from someone who is trying to sell me something, I'd contact Transgos' tech department and see what they think. I had one in my Challenger, and the builder did not change any servos. Perfect kit for my car and driving habits. I know damaged/cracked servos can cause issues but I don't see with the minor kit you're installing they will need changing. There are a couple of smart ex builders, on this board, Rusty Rat Rod is one, ask what they think.