The additives contained provide optimal care of rubber and plastic seals in the steering gear and automatic transmission. Leaks on transmissions caused by hardened or brittle seals are prevented or remedied. Holes and ducts in the gears are also cleaned, and the performance of the oil is revitalized. The noise generation of power steering systems is reduced and the shifting operations of automatic transmissions are improved. Can extend the service life of steering gears and automatic transmissions and lower the repair costs.