W.W. Williams & Allison Transmission

We're Your Allison Transmission Partner

For 100+ years, Allison Transmissions have built a reputation on performance and durability—equipping the transport industry with the ability to get the job done more efficiently. At W.W. Williams, we are a proud Allison Transmission distributor and service provider—and we're known for understanding the products inside and out. With top-notch service centers, factory trained technicians, and knowledgeable support staff, we'll help you get more out of your transmissions and vehicles.

Find an Allison Transmission Service Center Near You

Need transmission repair or service? In the market for a new transmission?

Full Service Support & Sales for Allison Transmission


We are your authorized Allison Transmission warranty service provider, with trained technicians dedicated to helping you optimize performance. We do it all—repairs, overhauls, rebuilds and standard maintenance all designed to increase the uptime and life of your transmission. Our Allison Transmission repair services include:

  • SPEC Tool© investment analysis
  • Driveline spec’ing with iSCAAN
  • Allison DOC™ software
  • Allison TransHealth™
  • Mobile service capabilities
  • Experienced, factory trained technicians


In the market for a new or refurbished diesel transmission? Allison diesel transmissions have a global reputation for quality, efficiency, reliability, and durability. We represent product lines for every application—both on-highway and off-highway. From big rigs to coach buses to RVs—we’ll help you find the heavy duty transmission you’re after.

  • 1000 – 3000 PTS (Pupil Transportation/Shuttle) Series
  • 1000 – 4700 RDS (Rugged Duty) Series
  • 1000 – 4500 HS (Highway) Series
  • 1000 – 4800 EVS (Emergency Vehicle) Series
  • 1000 – 4000 MH (Motor Home) Series