what is safe speed to tow with h2, pulling 22ft trailer about 4 hours in tow haul rpms will be cranking

 

according to operating manual you only use the tow haul when driving around town and in hilly terrain. I did a 22 hour one way trip to Michigan towing a 14 ft v nose 8 foot wide motorcycle trailer at about 5k lb in drive or forth and had no problem doin 70 at about 2k rpm.