Lugnuts are these overdrive units?
Yes. These are 5 speed floor shift transmissions with an overdrive gear. They were widely used in Chevy S10 and GMC Sonoma pickup truck trucks in the 1980s through the mid 1990s and are capable of bolting to a Chevy bell housing with a Muncie bolt pattern. The main appeal is that they’re fully synchronized and have an overdrive gear. The other nice thing is that you can keep your original floor stomp starter, and original clutch package. You can also keep your cable operated speedometer!!! I have these transmissions in both of my half ton pick ups. I have been rebuilding them for about 10 years and have a surplus at this time. I fully inspect, service, and rebuild these transmissions, depending on what they need. Some need a full rebuild. Others just need cleaning and are fit for immediate service without the need for a rebuild.