• Valvoline™ SYN GARD™ Transmission Fluid E-386

Valvoline™ Syn Gard™ 668 ATF is a full-synthetic heavy-duty automatic transmission fluid approved for use in Allison Transmissions®. Formulated to deliver outstanding oxidative stability and anti-wear performance, this ATF also provides extended drain interval capability. Syn Gard 668 ATF is approved for all TES 668™ applications and is backwards compatible for TES 295 applications, including Allison 1000-4000 series transmissions.