A shifter gate is what controls how you move the shifter, ie the shift pattern (A L for stock cruiser t-cases) I don't really know much more than that, I think someone posted a pic awhile ago of what you are supposed to grind. When I install my SM420, I was planning on just looking at the...
You can grind out the shift gate, and gain 2lo without buying the $200 twin stick. When you grind out this gate, you just move the oem shifter straight to the right from 2hi to get 2lo.