For GM 3-speed automatic transmissions (TH200, TH250, TH350, & TH400) Floor mount design requires a single 1" hole for cable pass through. 2-bolt shift lever stub with 7/8" center-to-center spacing and 3/8"-16 threads. Accepts standard 2-bolt manual transmission shifter lever of your choice (NOT included) Positive detents ensure that you won't over-run 2nd gear. Reverse shifter lockout detent. Integrated neutral safety & back-up light switches on shifter body. Plastic trim plate, shift boot, and chrome shifter bezel for a finished look in any interior. Shift Your Ride with Ease Rodders and muscle car fans have been utilizing GM's famous three-speed automatics in their builds for decades, and with good reason, they are simple transmissions that can take great amounts of power and are plentiful in salvage yards. The aftermarket offers all manner of rebuild for these transmissions as well, making their use even more prolific. We have built this universal floor-mount shifter for these applications with all the features you would need to allow easy control of your GM three-speed automatic to get you on the road quickly and at a great value! Built to Take Every Shift Our new Side Detent Shifter works with all TH200, 250, 350, and 400 transmission models. The shifter assembly is made from steel to take years of abuse and features a robust reverse shifter lockout system to prevent inadvertent shifter movement into reverse shift during spirited manual shift driving. Positive shift position detents provide feedback confirmation as to what gear position you are in while preventing you from over-running 2nd gear. We have included both a neutral safety switch and reverse shift light switch right on the shifter body that can be easily wired into stock wiring or any aftermarket wire harness solution