Transmission / Speedometer Fuse Blowing
 

I have a 02 express van and went on a dirt road and the fuse to the transmission / speedometer blew.

I changed it and everything was fine for a few months.

It blew again when I hit a pothole on the freeway.

Now it blows in a couple of miles.

It runs rough and will not shift into overdrive without the fuse.

Is there a part that would go bad from shock or is there a speed sensor that goes bad?