Apparently the 4l80 that I have now came out of a 98' model pickup and has a bolt on yoke.
I really want to buy the 99' and newer 4l80e,

Question is most of the newer ones I see has slip yokes and I already spent over $400 on a custom driveshaft and dont really want to have to buy a new one...
so will a bolt on yoke fit on an output shaft set up for a slip yoke?

And does it have the hole for the bolt

Also how can I tell what yr trans I have, I dont see any #'s stamped into the case????