Driveshaft problems after motor swap

[NarNar]

So I swapped from a 2.3 5 speed to a 4.0 auto trans from a 94 explorer. But my ranger driveshaft does not fit into the explorer transmission. The connection on the new tranny is smaller in diameter than the connection on my stock driveshaft.... ?? What?

 

[NarNar]

Explorer driveshaft connection Thumb for scale

Ranger connection same thumb for scale.

 

[4x4junkie]

It's because you swapped from a manual trans to an automatic.

You'll need to find a driveshaft from an automatic-equipped Ranger that is the same body type (wheelbase) as yours, which should fit right in.