Shell Spirax S6 ATF A668, 208 L - Allison TES 668 ATF

Shell Spirax S6 ATF A668 is a high-performance automatic transmission fluid developed for heavy-duty Allison gearboxes. It is officially approved to Allison TES 668 and provides friction stability, viscometric control and oxidation resistance for demanding service.

Recommended applications

• Allison automatic transmissions in commercial and industrial vehicles requiring TES 668.
• Compatible trucks, buses, municipal, emergency and other heavy-duty equipment.
• Earlier applications expressly identified by the equipment manufacturer.

In-service benefits

• Oxidation and thermal stability for extended drains when authorised by the manufacturer.
• Stable friction properties for smooth shifts and consistent power transfer.
• Wear protection and low-temperature performance for demanding service.

Technical data and approvals

Fluid selection and changeover

Confirm the exact approval required by the transmission and follow OEM drain intervals. Even where backward compatibility applies, a complete fluid change is recommended for full performance.

Safety and environment

For professional use. Consult the current SDS, avoid prolonged skin contact and send used oil to an authorised waste contractor.

The official Shell data sheet and official Allison TES 668 list are available under Downloads.

The displayed price is for the product; delivery to the customer is calculated separately by weight and destination.

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