Sorry if the images are huge but I dont know how to resize them. Anyway, the Top set of splines (closest to the threads) has 30 Teeth and the bottom row has 34 teeth. Now the pinion has 15 Teeth and they mesh with the 44 Tooth ring gear from the ITR. I bought it from a guy who told me I was getting the gsr countershaft to fit my ITR LSD into my LS tranny but this is not the correct one because none of my gears fit onto the splines (there are too many on this shaft) Make me an offer on it. Thanks