Does a 350 turbo lockup work without hooking up the lockup?

Yes, a TH350 transmission can function without the lockup feature being connected. In this case, the transmission will operate in a standard non-lockup mode, meaning that it won't engage the torque converter lockup, which can affect fuel efficiency and performance at highway speeds. However, the transmission will still shift and operate normally for everyday driving. It’s advisable to connect the lockup feature for optimal efficiency and performance.