Snapper RD1740 (2690155) - Snapper 40" Lawn Tractor, 17 HP, Hydro Drive, Rear Discharge - Transmission Group - Tuff Torq K46Q Snapper RD1840 (1694384 & 2690073) - Snapper 40" Lawn Tractor, 18 HP, Hydro Drive, Rear Discharge - Transmission Group - Tuff Torq K46Q Snapper RD2040 (2690114) - Snapper 40" Lawn Tractor, 20 HP, Hydro Drive, Rear Discharge - Transmission Group - Tuff Torq K46Q Snapper YT1740 (2690155) - Snapper 40" Yard Tractor, 17 HP, Hydro Drive, Rear Discharge - Transmission Group - Tuff Torq K46Q Snapper YT1840 (2690073) - Snapper 40" Yard Tractor, 18 HP, Hydro Drive, Rear Discharge - Transmission Group - Tuff Torq K46Q Snapper YT1840 (2690114) - Snapper 40" Yard Tractor, 18 HP, Hydro Drive, Rear Discharge - Transmission Group - Tuff Torq K46Q Snapper RD1840 (1694384)(2690073)