Shell Spirax S6 ATF A668 oil is a fully synthetic, heavy-duty automatic transmission fluid which is specifically designed and approved for use in transmissions requiring Allison TES-668 fluids. Spirax S6 ATF A668 is approved for extended service intervals and remains stable even under severe operating conditions. 

Key Features:

• Long enhanced protection - long equipment life
• Long fluid life - maintenance saving
• Enhanced efficiency

Key Applications:

- Allison Medium/Heavy Duty Automatic Transmissions