Looking for some opinions on shift kits for the a340f. It seems like the 2 big options are the transgo kit and the sonnax zip kit. Does anyone have experience with either of these or both together? Also, is there any way to identify the valve body type without pulling the pan? I put a transgo kit on my is300 and liked the firmer shifts. Also, I'm struggling with getting the overdrive to stay in. Seems like it does not want to drop into overdrive or if it does it likes to drop out of overdrive with any added load like a hill or slight acceleration. I'm running 33s but felt like the truck did it with stocks as well. Thanks for the help guys.