Finally got the coupler out...new one going in same way taken out. Walk through would be:
1. Jack driver's side vehicle up until both tires off ground; secure with stands. This is for those of you who aren't down with jacks holding a 5600 lbs vehicle in the air.
2. 15mm socket; one long neck 1/4 drive extension; 5 inch 1/4 drive extension.
3. 17mm open box wrench.
4. Lubricant.
5. Get under vehicle and mark drive shaft to output.
6. Socket on bolts, wrench on nuts. 6 total. You can get to them all without having to turn the driveshaft much less raise the vehicle significantly.
7. Pry bar or similar tools to dislodge coupler from shaft and output. Spacers are holding it together, so pry those or tap them out until coupler loose.
8. Push driveshaft towards front of vehicle and lower.
9. Remove coupler and any remaining spacers.
10. Reassemble.
11. Dorman Driveshaft Coupler 935-302. Made in Germany.