I've looked on the Tuff Torque site and through the Deere parts catalogue but remain puzzled on the trans specs.
The X300/320/340 tractors use a Tuff Torq K46 or a derivative there of. Rated for 131 to 171 ft lb torque and 675lbs axle weight max. Powdered metal gears.
The 19.5HP LA110 and 21HP LA120 uses a hydrostatic trans with a Deere part number of AM134582.
The 21HP LA130,23HP LA140,26HP LA150 use the M1A10911?
The LA tractors are using a “cheaper” dry disk brake trans than the internal wet brake K46 ? It looks like a K55? The Tuff Torq site lists their K46 as their lightest duty trans and post no specs on a K55 but they do show a parts diagram etc for the K55. Does anybody know what axle torque, axle dia and weight capacity a K51 or K55 is rated for? Or for that matter what transmission(s) Deere is actually using in the LA line of lawn tractors?