I'm pretty sure the Attack 2.4 that comes with the later ones like the JS-2 do it, I can't remember exactly and I'm not near the tank at the moment. As far I recall, there's no binding with them, so you could turn off the Tx without causing a runaway.

With Spektrum, I could remotely turn off the HLs with a DBC3 using the gear switch, but never managed to do it with Tamiya like you can with the old FM or AM Txs. I'm glad I hung on to my old Futaba Attacks, especially now with subs since 2.4 doesn't penetrate water.