Did this start after the half shafts were replaced? If so, did you use new axle nuts and torque them to the proper spec. With a click-type torque wrench? The tightness is critical, and the nuts are a one-time-use nut. That shouldn't cause a constant clicking noise but it will lead to real early failure of the wheel bearing which will become noisy. A loose nut can cause a single click when you accelerate and a single click when you let off the gas to coast.
Be sure the inner cv joints are fully seated on the stub shafts coming out of the transmission. If they aren't, you would have had a really hard time reattaching the lower ball joint.
If there's a rapid constant clicking, jack the front end up and run it in gear to see which side is making the noise. Look for brake caliper-related problems.