Just because a transmitter and receiver's frequencies are not the same, doesn't mean there can't be any interference. If the transmitter signal is strong enough, it could still overload the receiver's input circuit, or swamp the weak signal that the receiver is trying to lock onto.

But it depends on various things like signal strength ratio of the two signals, the type of receiver circuit, the ability of the receiver to reject frequencies outside the band (it is not infinite), etc, and it may or may not be a problem in this case.