Wanted: Ford transmission expert

[40larry]

I have two transmission questions regarding parts used in these transmissions.


1. Is there a difference between the 022a-7113 and 21c-7113 cluster gears? Why are there different part numbers if they are interchangeable?


2. Is there any difference between the 01a-7100 and 21c-7100 low rev slider gears? They appear identical but??


Thanks for your help........40larry