Yeah, those no name coils are a problem. Replace with FJ coils.
I converted my air bags to FJ coils with Bilstein 5100 in the rear and Bilstein 6112 in front at the lowest setting. It still picked up about .5" so basically at the "high" setting on the air bags. Rides perfectly on the street...
Sample of one, but when I pulled out my air ride system the compressor/dryer was full of water. The system was still functional though, so not sure if there is a purge cycle to it.
There definitely needs to be coolant in the overflow, the cap has a siphon tube down to the low level of the overflow tank and coolant does move back and forth between the radiator and overflow.
A new denso radiator is like $150 or so and it's a 1 banana job, then add a piece of hose from the...
The brake system is split, front vs. rear. The rear uses the ABS pump you hear on startup. You can use the pump to quickly bleed the rears, Techstream has a function to turn the pump on and it continuously runs and pumps fluid through the rears (you can also have the pump run by having someone...
Check the front speed sensors. Visual inspection for damage (wires especially since you did LCA and bearings). Then Techstream to see what the ECU is seeing from both sensors.
I'd seriously question your mechanic. Both the front and rear DS have zerks, along with zerks on all of the Ujoints. So 3 grease fittings both front and rear.
Also are you sure it's the TC? If the sound disappeared when the rear DS was removed it could be the ujoints and or the slip yolk. Relatively easy to replace the joints and grease the slip yoke.