This combo diff set is made using 7075 T6 aircraft aluminum and hard anodized for maximum wear life. We designed it to use the stock Tekno parts.
We have redesigned the inside to allow the case to hold over 2 times as much diff fluid. This will give you more consistent diff action thru the entire run in a long main. We have also added spider gear shims (small inner gears) to cut down on friction.
These are custom hardened shims that will not rotate in the case so there will be no wear on the diff case.
Many thanks to Chris Nunez, Kevin Rowe and Matt Wolter for all the help in getting these diff cases designed and tested.