CARB Compliant

Press Releases

Allison 4000 Series™ Transmission Now Available with CARB-Compliant PACCAR MX-13 Engine

Allison Transmission is pleased to announce the Allison 4000 Series™ fully automatic transmission is now available with the new CARB low NOx compliant PACCAR MX-13 engine for Kenworth T880 and Peterbilt Model 567 truck models. The Allison 4000 Series™ is the only fully automatic transmission available with the MX-13 engine that is CARB-compliant and the pairing is designed to optimize performance…