Finally got to build one myself.

[manbridge 74]

Originally Posted by gled49

I thought stock retainers were powdered metal. 906 steel retainers are a little wimpy and you can see a little pull thru, depth of the keepers. 935 steel retainers are very robust.

The 3.0 & later ones are sintered steel, and that means they can fracture if you ever miss a shift. The 2.7 and earlier ones are machined steel and are more durable.

Grady Clay said a few times that 935 used ti retainers.