Superdawg6

Could be, I know the main is a spicer but not sure about aux. I'll post when I find out. 

That's possible, we're picking it up Monday I'll post some pics. 

Thanks man, good advice 

Main is a spicer 1252A couldn't see aux but I'll dig deeper when I get it home Monday.  

Makes sense, thanks

Just bought an 80 Superliner with spicer 5x4. What I can't figure out is overdrive on the auxiliary is up and to the left where 1st or lo should be not up and to the right. Anybody run into this before? Posted this in eng and trans section but figured I'd try here too. Thanks

Just bought my first Mack today! 1980  Superliner with 400 cummins and spicer 5x4. Trying to find some info on the aux trans. The shift pattern is backwards. Runs and shifts great but high gear is where first should be, up and to the left. Don't have the truck at home yet so no trans numbers just hoping someone knows off the top of their head. Thanks