For fleet managers, heavy-duty truck owners, RV enthusiasts, and bus operators, the Allison Transmission is a benchmark of reliability. However, when it comes time for maintenance, ordering parts, or verifying the history of a used vehicle, one task stands above the rest: the .

Designate the vocation, such as RDS (Rugged Duty Series), HS (Highway Series), or EVS (Emergency Vehicle Series). Troubleshooting Without a Scanner