I may be close by. You get to be neighbors to the overlord :P Join GXOR on Facebook if you use it. We have a global and regional chapters, including GXOR-GA and we do get togethers when we don't have an unscheduled apocalypse.
Can be bushings in the rack under load or internal seals losing pressure. I had a rack that had chipped teeth on the mechanical side (first rack) and a rack that had an internal seal leak (second rack). They aren't exactly the most robust design passed the stock phase lol.
I swapped to a smart tap relay using a toyota 9 to 12 pin harness I repinned to make it work (and killed my DRLs) in my GX470.
6 ohm is the resistance for hyperflash usually. Make sure you put the resistors where they can cool and not touch any wiring as they tend to get hot.
I just loosen the drain plug with a socket and extension and let the oil drain down the extension until I pull it away. Or I just have someone else change the oil when it goes for the next upgrade (usual approach).
Is this a 4th Gen 4R or a GX? Sounds like the CDL wanted to lock or was locked when you attempted to shift? Can be out of phase...but that beep is from the CDL. If it is a 4Runner with the dial, the 4L actuator is right next to the CDL actuator (all one assembly). Can check the basics like oil...
I went underlanding.
Sounds like a plug is loose. The ABS module and the wiring on the engine can get knocked a bit while working on a starter. Also, may be a fuse or possible the brake switch (brake light). Otherwise...going to need the codes.