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An unladen 2wd p/u has probably only about 33% of the vehicle weight over the drive wheels. My F150 2wd has a cap and about 13 4x4x8 posts for traction, but when those are not in, snow can really make you go slow and easy.
The computer on the F150s carries a fast idle condition (for warm-up purposes, I suppose) for what seems to me to be a heck of a long time. Fast idle means the truck will creep if you take your foot off the brake. When you entered the corner, there was obviously enough touque to break traction under those conditions and, once traction was lost, the wheels were free to spin on the snow, removing ANY chance you had to 'catch' the rear end. It may have done this even if the idle was normal.
Back in the days of atomatic chokes, I was taught to put in the clutch in a manual transmission vehicle, or shift to neutral with an automatic, if there was going to be too much torque fed to the rear wheels during a manouver (at parking lot speeds).
Les
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Les
My train of thought has been replaced by a bumper car.
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