Its just the extra spring, if it has a D-MAX in it your stuck with 3.73s from the factory. No 4.10 option was ever available for the D-MAX.
Truck: 06 CC/SB LBZ "The Screamin Demon"
4094 AVNT w/ Danville billet wheel
PPE Stage 5 trans, PPE Lift Pump, PPE Gauges, Maifolds/Up pipes
All Season Y-bridge and EGR Delete
DTS Stainless DP & Hot Side IC
AFE Intake Labonte Stage 3 Water/Meth
Zone 6" Lift, Dodge Posi
Evil Arc Fab Steering, Bumper, Welding Bed and Coolant Re-route
35" BFGs, 16" PCXA Wheels
12.67@105 1/4 Mile
2006 CCSSSB Vortec Max 4x4
6" Rancho, 33"s, 4.56 gears, Volant and efi live