I just had this same experience at a local dealer. Badge on frame says TC40A, sticker on hood says TC40a. Parts person insisted it is a DA based on s/n, even though it is a manual/shuttle transmission and by no means "deluxe". Seems there something awry with NH database. Could get interesting...
Thanks dlctcg. NH cust serv responded to an inquiry and advised the ...513 is the one I need for my particular version of TC40a. Wonder what they changed in 2006? Must have been mid-year also, since mine is a 2006 but aligns with the 2003 Ops Manual.
Just bought 2006 TC40a and see that NH lists two Ops Manuals, 87319782 and 87300513. My tractor is PIN G604xxx. Any idea which one applies? Will I run into the same sub-model issue with repair manuals? Thanks.