VOITH 55.6335.xx

VOITH 55.6335.xx – this is a technical approval issued by the German manufacturer Voith Turbo GmbH for hydraulic retarder systems and automatic transmissions of heavy vehicles. It defines the requirements for class B oils that provide stable torque transmission, wear protection and preservation of hydraulic integrity under high loads and frequent braking cycles. The specification is applied in diesel trucks, buses and special equipment, often equipped with DPF systems, where compatibility with the catalyst and low SAPS content are required. Oils that meet VOITH 55.6335.xx include transmission products such as XA‑TRAN CVT, X‑TRAN 75W90 GL‑4/5 and others approved in documents 55.6335, 55.6336. Use of such oils guarantees OEM‑recommended reliability of braking systems and transmission durability under intensive operation.