Could you post the year and rear axle ratio and if it came equipped with a factory to package.
No factory tow pkg and TTC could be as low as 2,000lbs.
Camping Life Magazine's web site has trailer tow rating back to 1991.
Does the trailer have brakes of any kind ?
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.