FYI, Not all 2L Roadster 5 speeds have servo synchro's. In fact, most have the warner synchro's. There is no reliable way to tell by looking at the trans. You have to open it up. If you know what the toothed edge of the brass synchro ring looks like, you can sort of see it through the oil fill hole. If it's in a car, you can tell the difference by the way it shifts. the warner synchros feel more normal, like detent balls alone. The servo rings feel more damped like pushing the gear lever past the detent balls and then through some other resistance before the gear engages - if that makes any sense. To further complicate things, all of the roadster 5 spds have servo synchros on 5th gear - so you can't just take the tailshaft housing off. If you're looking or roadster info, start at 311s.org. There is a for sale forum there as well as a list of vendors.