UN1 uprated?

[Bill J]

Is there any way to tell if a UN1 is uprated by looking externally or internally with a borescope? I have no plans to take it apart to see what is inside just for fun!

 

[Davidmgbv8]

If the output shaft does not wiggle around then you have a one piece mainshaft

 

[Paulbav]

Rotate the output shafts too, you’ll know if you have an ATB or open diff then.