Torque limiter is a clutch disc trapped against the flywheel that transmits all the power from the engine to the transmisson, PTO and hydraulic pump(s) located anywhere in the rear axle area. If you have hitch and remote hydraulics but no travel or PTO, I'd sooner think you don't have any regulated circuit (low) pressure or flow that is required to lock up clutch packs. Probably no lube flow to the transmission, either. Failed torque limiter would disable everything except any pumps driven from the engine's cam or timing gear train.
Speaking only in theory here, I have no direct experience with 6 cylinder 30 series powershifts.