I am suspicious about the spin drain being a strain on the tranny. If a perforated tub is full of water, the weight of the wet load is suspended in the water so while the whole assembly weighs a lot, the perforated tub is not bearing the total weight nor, by extension, is the transmission. The perforated tub is moving through the water, which, while it does have drag, does buoy the weight. A solid tub full of water and laundry does take a lot of energy to accelerate to speed, as is noted by how many solid tub machines required the circuit to be protected by what was called a "slow-blow" fuse that could withstand the initial heavy current draw at the start of spin, especially in the early days of automatics when many machines shared circuits with other electrical devices or were on lighting circuits. A most commonly experienced situation among club members is the Unimatic mechanism which actually drops into the start windings between agitation and spin because the mechanism's shift actually stalls the motor. If the capacitor goes bad, it won't spin unless the tub is empty and even then it's iffy. An alternative was a clutch, a slipping belt or a fluid drive like Beam used.
These Design 2000 machines were introduced in the early days of no phosphate detergents and had complaints that they left detergent and lint streaking on the loads. I never let my KA go through a neutral drain and have had no such problems.