Here's the scoop on the trans rebuild and Trans Go shift kit...I LOVE IT!!
All new parts went into the transmission including a shift solenoid body. The kit really made a good difference. It don't really think it should be classified as a shift kit, more like a "fix what Mopar didn't" kit. It holds onto 1st gear a little longer at WOT. No waiting for the gear to engage when shifting from park. Up shifts are smooth and seamless as well as down shifts. You really have to pay attention to feel the shifts because it is so smooth now. Best way to describe it is, Solid. Running better than the day it came off the production line.
At this point, I highly recommend this kit, especially if you have the transmission out of the vehicle. If not, put in the shift kit accessible through the pan and save the rest for when the trans has to be rebuilt.
One thing to note, the transmission filter only had 9,000 miles on it and it had already split. Not sure if that had anything to do with the day I broke it, or if that was part of why it broke, but the filter failed....and rather early at that. So keep an eye on that fellow WK Jeepers.