Trans makes wierd noises in 1-2 shift (96 Cobra)

Posting under my friends name. The 96 Cobra I just picked up makes a sorta "grinding" noise when you shift from 1-2 without pausing between gears for enough time. I hope this isnt anything TOO expensive or hard to fix, I didn't notice this when i first drove the car cause i was taking it REALLLLL slow. The car is still under a 30 day warentee from the dealer i bought it from, is this something that I should have them fix?
-Chris
 
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