85431 Spreader Gearbox Kit Snowex Helixx salters .7 , 1.5, 2.0, 3.0, 4.5, 6.0

A New Spreader Gearbox Kit (part # 85431.) This is the same as a 99067 and 99087 but this comes Auger driveshaft 11892 and machine key 99572. 

 Snowex Stainless Helixx,  This is used on many sizes ranging from the small  .7, 1.5, 1.8, 2, 2.5, 4.5, and 6 yard. Gear Box 10 x 20 2X Worm Gear.

 One side has 5/8" keyed hole with the flange to bolt to the 99085 motor Fisher and Western or 85479 motor Snowex. 

This is assembled with 30017 connector flange and the 30456 Motor plate.

The tag says this is model MRVC40/50-FS2, Ratio 1:100. The diagram says 2:1 ratio, W-Geary or JIE Jdrive. 

You can find related parts and diagrams in this document.