That's really good information. For the mount I did use the 4wd mount as the 2wd mount would not bolt up to the transmission. I used the factory bracket from the 2wd as it bridges the gap of where the 4wd crossmember would sit. I am actually moving to a Trail gear skid/ crossmember. I had to shim the 2wd bracket as originally it was rubbing on the frame and causing some vibration. I got it to sit right however it is sitting just high enough that when I load the truck up with weight and the body mounts compress, the trans rubs the frame and causes an ever so slight vibration at idle. Its really hard to notice and I could shim the mount more to alleviate it, but I figure its a good time to upgrade to the big beefy trail gear crossmember.
Its also funny you mention the shifter assembly nuts as I just drilled holes and used self tapping screws along with some high qualify rubber sound deading to insulate the threads and cover the shifter hole (Me and gramps went to town with the grinder lmao). I didn't think to weld the nuts in place before.
I was planning on wiring the dash light and I'm playing with the idea of installing the center locking diff t-case in the future....just gotta figure out how to wire in the 4x4 control module into the dash.
As far as abs goes, my light is on and im using the hubs/ bearings from a 1st gen tacoma since I went with the manual hubs. Im wondering if its an issue with the sensor since I had a shop press in and assemble my spindles. I saw your right up on this before hand (very informative btw) and swapped in a 96 auto from an SR5 into my 99 Limited and its been running smooth as butter.
