Anyone know what spline size difference there is on B-series cable tranny's. I know there is a small and large, but which one is USDM, and which is JDM. Also what are the two sizes? Found a decent tranny, and dont want to buy something i cant rebuild. JDM YS1- not rebuildable USDM YS1- rebuildable.
Just want to know before i purchase...
Thanks in advance.

 

The spline count for the JDM and USDM trannys are the same, it is the spline count between the series/model.
Meaning -YS1 all the same spline count regradless if US or JDM
J1,SI,Y1 all same spline count regradeless if US or JDM

YOu can tell the difference from the internals and bearings, etc.