I went to Uwharrie this past weekend, had a blast, but the truck did something funny. Toward the end of the day it seemed to freewheel in 1st. The trans stopped holding the truck back on down hills. When gas was applied it acted as normal, just as you took your foot off the pedal the rpms dropped to idle as if in D. Then later I tried it again and it seemed to work again. Anyone ever seen this?