I have a ys1 tranny in my ls that was purchased from a person who said it was the gsr ys1. However I was informed that there were three ys1 trannys. How can I id this tranny to know if it is the short geared tranny? Any websites or any one know the numbers?

 

At 60 mph what rpm are you at? my ys1 gsr sits at about 4,000 rpm at 70 mph.

 

is that in 3rd or 4th gear?

 

5th...