Rebuild my 4R100 or switch to a 6spd?

[cesspool]

how hard would it be to switch to a 5 speed auto?

 

[DaveBen]

In what year truck?

Dave

 

[cesspool]

2000 excursion

 

[trackspeeder]

how hard would it be to switch to a 5 speed auto?

The 5 speed auto would be the 5R110. Its not compatible with the 7.3.

The tranny bolt spacing is set up for the 6.oh.

Build up the 4R100. If its done right it will not break. Plus it will be cheaper than adapting another tranny to your vehicle.