1/4 inch of tread is really not very much, and will limit the tire's ability to channel the rain away from the tread, with possible hydroplaning. That might have contributed to the momentary loss of traction. As for tires, I have had Firestone Transforce on my F350 for several years, with never a problem, especially pulling an 11,000 # 5er. As a case in point, one winter several years ago, there was an ice layer topped by an inch of snow on the roads here. My wife slid her Olds sedan off into a 1-foot ditch on a curve. I nosed up to the ditched car with my truck, attached a chain, and pulled the car out of the ditch with no loss of traction on the ice and snow at all. In addition, the truck was pulling backwards and up a slight hill. I know the weight of the truck helped with traction, but I have a lot of confidence in these tires as well. JMHO
2003 Ford F-350 V-10 Crew Cab 4WD Long Bed
2004 Jayco Designer Medallion 29 RLTS 5th wheel
Bill, Gayle, and Mindi (dachshund)
Retired at last !
Nothing is foolproof to a sufficiently talented fool.