[mongocanfly]

Here goes..changing the input shaft has nothing to do with the speedometer. Its the dodge transmissiin that people are after
the dodge nv4500 trans has a mechanical speedometer output shaft but has a longer input shaft
The Chevy nv4500 trans has the electronic pulse speedometer output shaft but has the shorter input shaft..
when people want to keep their mechanical speedometer they are using the dodge version nv4500 and swapping the input shaft from a dodge to a chevy..
Doing this is giving them a chevy style input nv4500 with a mechanical speedometer output.
When I did mine all I had was a newly rebuilt chevy trans.my only option then was the dakota digital convertor which takes the chevy speedometer electronic pulse and converts it to a cable drive so that I could keep my factory speedometer