Yes, if it leaked out there, it was overfilled- - - - -OR- - - - -there might be water in the bottom of case which will float the gear lube on top of it. If the vehicle hasn't been driven in a while, pull the bottom plug and see if there's water under the grease. It only takes about 3 quarts for a complete refill so it won't break the budget to do a drain and refill.
Jerry