The kit includes all the parts to form a new diff using your existing kit parts.
Schumacher Alloy Diff Complete V2 - Kr,Kd,Ld/2/3,St/2 U8396 C
Schumacher Alloy Diff Insert (+1.25) (pr) - CAT PB U9297
Schumacher Alloy Lower Shock Mounts - Mi8 HGT Conversion (pr) U8569
Schumacher Gear Diff Complete - Ld/2/3 U8646 C
Schumacher Gear Diff Set (Hex Wheel) - Atom 3 U8911
Schumacher Gear Diff Spur Gear 60T 48DP - Icon 2,A3 U8341
