Hey guys can anyone tell me if shifting into 1st gear at highway speeds for approx 5 seconds can damage anything? I was in drive going 70 mph and went to shift into manual so I could down shift and accidentley went into 1 st gear! I heard the engine rev high but the truck didn't slow down or anything. Is there a safety feature to prevent damage to the tranny? Does it go into nuetral or something? Everything seems to be ok, just has me feeling like a complete idiot and worrying something may be wrong. Any info is greatly appreciated.