1998 ford econoline 350 v-10 need the pinion nut torque spec.

Hello, This depends on which differential you have in your Econoline. A Dana 60/70 would need 220 - 280 lb/ft. A Dana 80 would need 440 - 500 lb/ft. For a FORD (non-Dana) axle: The manual directs that Ford axles be set by continually measuring preload and setting torque based on the torque measured on the companion flange prior to removal in the first place.