Originally Posted by macnkitty2002
1. I don't use the kit shock oil simply because I don't know what viscosity it supposed to be comparable to.
2. Belts just need to be adjusted if they are too loose. Your belts will flip if they are too loose, but it's best to run them as loose as possible for a resistance free drive train.
3. The diff spring is the part that would need to be broken in on the diff. However, if you use pliers to compress the spring prior to installation, you will take care of most of the diff break-in process. You might also want to sand the diff rings with 600+ grit sandpaper.
4. I used to use an 18 tooth pinion with the stock TA05 06 module spur gear for a FDR of 8.75 when I ran my 5.5R (non-sintered rotor). I have since sold my original TA05 and bought a TA05R. Now I run more tame brushless motors and have not tried my 5.5R with the new sintered rotor. I'd guess that I'd try a FDR ~8.0 for a starting point with the 5.5R and a sintered rotor.
5. For a dual-diff setup or a spool setup, the yellow medium springs (they are colored white with the TA05R, but are still medium) worked well for me.