What is RAM’s Part-Time 4×4 System in Vermilion, AB?

May 23,2022

New RAM trucks  come with either a RWD or a 4x4 drivetrain. The two options provide different benefits as far as traction, towing, and fuel economy. The AWD models have a unique part-time, shift-on-the-fly system that brings the best of both worlds to Vermilion owners.  

2021 RAMs, including the 1500, 2500, and 3500, offer a part-time four-wheel drive. This system allows the vehicle to switch seamlessly between 4WD and RWD using a front-axle disconnect component. If just two wheels are receiving torque, the fuel economy improves slightly. You can also get better towing performance, but only on roads with good traction. 

How does the part-time 4x4 work? It uses a transfer case to switch driving modes. It is a shift-on-the-fly system, so you can change between RWD and 4WD while moving at speeds of up to 88 km/h. It relies on an electrical, mechanical motor with a vacuum line that ensures a smooth transition. 

Front and rear stabilizer bars (standard on 4x4 models) and an available anti-spin differential also assist with traction and steering in slippery or otherwise challenging conditions. 

If you have questions about the mechanics or capabilities of RAM's shift-on-the-fly 4x4 system, contact our dealership today.