I have a question for you guys. I drove the car today and realised it has no first gear, it just starts off in first, even at WOT. But I have all the other gears. I read somewhere it could possibly be the speed sensor in tail shaft. The plug got a little smashed by accident on install. So my question is, would my speedo still work if the speed sensor isn't getting any signal? Or could it be something else?

Thanks