Dan the Gear Man Tech® Note 1:
All New Process NP205 Transfer Cases EXCEPT 1982-1985 GM synchronized NP205 Transfer Cases use two of these Lock Rings, one on each output shaft. 1982-1985 GM synchronized NP205 Transfer Cases use one of these Lock Rings on the rear output shaft and a QU30081 Lock Ring on the front output shaft.

Dan the Gear Man Tech® Note 2:
Optional Matching Parts for QU10689 are:
TK10859 Low Gear
QU50345 32 Spine Front Output Shaft
TK50084 32 Spline Rear Output Shaft
QU50185 Low Gear Bearing Rollers
QU10696 and QU50256 Low Gear Thrust Washers

Dan the Gear Man Tech® Note 3:
Need Tech Help on rebuilding your NP205? Get my TM2000 New Process NP205 Transfer Case Service Manual. A Complete NP205 shop Manual with over 375 color photographs is your indispensable NP205 resource for Repair Procedures and Parts Identification. Complete coverage of Disassembly, Inspection, and Reassembly Procedures. Also, Shop Notes, Tool Recommendations, Complete Parts Guide, and full color Exploded Views, including Right Drop and Left Drop Models, plus GM Specific Parts. Covers New Process NP205 Transfer Cases found in Chevrolet, Dodge, Ford, GMC, and International Harvester (IHC) 4x vehicles from 1969-1993.
Or my TM2002 for the Exploded Views and Parts Guide only. Fully Illustrated with dozens of crisp color photographs for EASY Parts Identification! This Manual includes 10 page Parts Identification Guide with full color Exploded Views.