Well, it was my brakes, the problem was that I replaced the booster at the same time and didn't give the pedal any freeplay when I put it in, so the master cylinder was slightly on all the time. I loosened up the nut to give it some freeplay and it's fine now.
But what I was really wanting to do is update this thread with part numbers that some might find useful if they end up setting up their own diffs.
Charlie Glabe's Writeup is a great resource, once you get used to all the terminology, so that's what I will try to help with. BTW - make or find someone who has the side adjuster tool - you will be stopped dead in the water without it. I just wanted to say a few things and answer a few questions that I had to spend time wondering about, so don't make fun of me for being stupid
. BTW, all this stuff comes in a diff setup kit, but this is for the people who decide they want to go through Toyota and build a kit piecemeal.
Pinion depth shims - this guy comes out when you pound out the inner pinion bearing race. It's about three inches in diameter, and its purpose is to set the pinion depth so that the tooth pattern on the ring gear is okay. They come in five different sizes from Toyota, you need to (by trial and error) find the correct one for your ring, pinion, and housing setup.
Toyota calls them "Shims":
90564-68001 - 0.25mm (0.0098")
90564-68002 - 0.30mm (0.0118")
90564-68003 - 0.35mm (0.0138")
90564-68004 - 0.40mm (0.0157")
90564-68005 - 0.45mm (0.0177")
For example, a 0.40mm shim came out when I pressed out the race. As I'm setting up my gears, I will again use a 0.40mm shim. If the tooth pattern is not right, then I will have to pound out the race again and REPLACE the 0.40mm shim with a different shim - you DO NOT stack shims unless you are very unlucky.
Next are the Preload Washers - These have a thickness to them and a beveled edge that sits against the shoulder on the pinion, and they are the fine tuning adjustment of the preload. You only use one.
Toyota calls them "Spacers":
90560-30184 - 2.74mm-2.76mm (0.108"-0.109")
90560-30185 - 2.77mm-2.79mm (0.109"-0.110")
90560-30186 - 2.80mm-2.82mm (0.110"-0.111")
90560-30187 - 2.83mm-2.85mm (0.111"-0.112")
90560-30188 - 2.86mm-2.88mm (0.113"-0.113")
90560-30190 - 2.89mm-2.91mm (0.114"-0.115")
90560-30191 - 2.92mm-2.94mm (0.115"-0.116")
90560-30192 - 2.95mm-2.97mm (0.016"-0.017")
90560-30199 - 2.98mm-3.00mm (0.017"-0.018")
Finally, the Preload Shims - These work in conjunction with the Preload Washers, and get you close while you dial it in with the Preload Washers. They come in one size only, and you can use up to four (4) if needed.
Toyota calls them "Shims":
90564-30035 - 0.25mm (0.010")
So for the whole kit, you will need to get one (1) each of the five (5) Pinion Depth Shims, one (1) each of the nine (9) Pinion Preload Washers, and four (4) of the Pinion Preload Shims.
HTH for anyone interested...