The 210 spec is just a starting point. By the sounds of it you still haven't tightened it far enough to collapse the new spacer.

1. Install the companion flange washer and a new nut on the pinion and tighten the pinion nut until there is zero bearing end-play. It will not be possible at this point to achieve zero bearing end-play if a new collapsible spacer was installed.
2. Tighten the nut to 285 N·m (210 ft. lbs.)
3. Using Holder 6719, crush collapsible spacer until bearing end play is taken up.
4. Slowly tighten the nut in 6.8 N·m (5 ft. lbs.) increments until the desired rotating torque is achieved. Measure the rotating torque frequently to avoid over crushing the collapsible spacer
5. Check the pinion bearing rotating torque with an inch pound torque wrench. The torque necessary to rotate the pinion should be:
   • Original Bearings - 1 to 3 N·m (10 to 20 in. lbs.)
   • New Bearings - 2 to 5 N·m (15 to 35 in. lbs.)