not so much a problem with ALL leaf sprung vehicles, some are worse than others:
spring under axle combats axle wrap quite effectivly. spring over axle is more susceptable, and to make matters worse, most rangers also have a rear lift block. add deeper gears to the equation and rangers have bad axle wrap.
my truck is a 2006 fx4, in deep snow it wheels hops so bad i'm worried it will break something! on the street, it feels like the axle wants to twist right out from under the truck when accelerating hard.
i ordered the james duff traction bars on friday, so we'll see if they as good as everyone says! i expect to be pleased with the results!
PS: i've been told that for every one second of holding power in an automatic transmission (like what you did), you raise the fluid temp in the torque converter 100 degrees!