this just started this week some times when i go to take off from a stop the truck will start to gain speed and then some where between 1500 or 2000 rpm's or so it seems like the truck will slip in to nuetral. the rpms jump up and then all of the sudden bam shifts in to second. decided to check the tranny fluid and it was really low. i added a couple of qts. and went on my way. as i was in the middle of a 500 mile road trip. i haven't had a chance to climb under the truck and look to see where it leaking from yet. also after the added tranny fluid it stopped haveing the problem. any info would help

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