What Kind of Transmission?

dukeboy_318 said
We have one as a grain truck, its a 4 speed +2, in other words, 4 speeds with 2 speed axle. Transmission in it is a NP4530. I believe the 5 spd version was a NP540 series.

Okay I'll check it out. I've never heard of these trucks having a 5 speed this early.