How can you tell if you have a World Class or a Non World Class T-5? This number is stamped on the outside of the tranny:

RF-F4ZR-6394-CA

Also, looking at the the different rebuild kits at GearBox; which one should I get? I am mainly wanting to replace my second gear synchro, but not sure if I should replace more since I will be in the tranny.

Thanks

Inside the bell area, next to the input shaft, a WC tranny has a silver plug about the size of a half dollar. Non-WC does not.