Newmar , on a Spartan chassis had a 10,000 TTC in 99, the same coach on a F/Liner is only 5,000. I assume that the same is true for other years.
Not sure if Newmar was producing a shorter DP in those years.
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.