On Page 14 of PS 753 (Aug 15), we let you know that for FMTVs from serial numbers 100,001 or above, you could get an interconnecting box using NSN 5895-01-591-7887.
That’s still true. However, NSN 5895-01-591-7887 is listed in FED LOG as AAC “V”, which means you can only order it until stock is depleted. It’s currently priced at $767.
TM 9-2320-333-23&P (Jun 19) lists NSN 5895-01-591-7887 for 2 ½ -ton FMTVs as Item 56 in Fig 14 and for 5-ton FMTVs as Item 56 in Fig 1014 for GEN IV transmissions. It also lists NSN 5895-01-649-8229 in both figures for GEN V transmissions, at a cost of $582.
Bottom line: either interconnecting box NSN is acceptable to use with the GEN IV or GEN V transmissions. So make a note until the TM is updated.