When the suspension rods wear out it can cause the center tube to seal/bearing too also wear and leak. Rust forms on the drive shaft. Basically everything under the agitator or wash plate is damaged. The rust on the drive shaft won’t allow the basket to drop into position completely or float up into position. This causes the basket to bounce and go off balance, even without any clothes in it. The parts needed are the gear case w/drive shaft, tub seal, hub assembly. If the wash plate is rusted to the shaft, it might need to be replaced. These washer last about 6 - 10 years.