From now on all kits and parts shipping from the manufacturer will contain updated internal sun gears. If you are a master mechanic, you can tell the difference by just a quick glance. If you are not, here is the way to do it. The new gear has a larger flat area on top of the gear. Also, it is a darker colour. The new part number is JQB0066A.
With the new gears, the shimming is updated. When using these gears this is the way to shim your diff:
1pcs shim behind each sun gear.
0 other shims anywhere.
We apologise for the inconvenience.