Clarification: Juggernaut's helmet and forcefield do not stop TK, it's stop's Telepathy. Telekinesis does nothing to him. And TK =/= TP. DBZ is not known for psychic battles nor anything even remotely like anything that has been used against Juggernaut in the past. Even without the helmet, there isn't jack Goku nor Gogeta could do to him.
Yep. he wouldn't be able to beat classic juggernaut because he is invincible with his helm.. But with gogeta ssj4 that's a different story since gogeta ssj4 has telekenesis
Which is exactly what Juggernaut's helmet protects him from...