It is not (repeat not) a CV joint, axle, wheel bearings, or transmission. We've spent the last 4 months replacing everything and the replacing it again. We've had transmission shops verify it isn't the transmission. I've replaced the rack and pinion, 1/2 axles (both), wheel bearings (driver's and passenger's sides), tie rods, suspension arm bushings, etc.
While the wheels are on the ground, it makes the noise constantly. The faster I go, the faster it makes the noise. When we jack the front end up in the air it sounds like the gears are trying to catch on one side of the transaxle. So, does anyone know if there are bearings of any kind that can be replaced or is there something else that could be causing the noise?