| MY2027 reference | L7 | L8 |
|---|---|---|
| Automatic transmission | Allison 2500 RDS | Allison 3000 RDS |
| Brake baseline | Hydraulic; air optional | Full air |
| Body decision | Match brake and suspension options | Check heavier body loads and mounting requirements |
A larger chassis rating is not a payload guarantee
Subtracting an advertised empty chassis weight from a gross rating omits the body, installation equipment and often the operational load. Ask for completed axle weights and an installation review. The rear axle may reach its limit first if a liftgate or concentrated load sits far behind it.
Compare the systems you will maintain
Inspect the actual transmission, brakes, rear suspension and tire specification. Have the service provider price the work that is due on each truck and confirm access to the relevant equipment. If both configurations meet the application, condition and body suitability may have more purchase value than moving up a model name.
Sources and reference scope
Reviewed September 9, 2026. Manufacturer facts are tied to the edition below; inspection and purchase-planning questions are editorial guidance.
Canadian MY2027 L6, L7 and L8. Published chassis choices; individual option combinations require the order sheet.
Select the truck model year and conventional or cab-over chassis before using installation drawings.