2022 Mercedes-Benz Sprinter Transmission & Axle Gear Ratios

Transmission gear ratios

The 2022 Mercedes-Benz Sprinter offers two primary transmission options depending on the engine and drivetrain: a 7-speed automatic (7G-TRONIC) and a 9-speed automatic (9G-TRONIC).

7G-TRONIC Automatic Transmission (G42)

This transmission is typically paired with the 2.0L 4-cylinder diesel engine in certain configurations.

9G-TRONIC Automatic Transmission (G43)

This transmission is more commonly found with the 3.0L V6 turbodiesel engine and some 2.0L gasoline models.

Available axle ratios

The axle ratio plays a crucial role in balancing towing capability and fuel economy. The 2022 Mercedes-Benz Sprinter offers several axle ratio options to suit various operational needs. Mercedes-Benz refers to their axle ratios by the final drive ratio (overall reduction from the transmission output to the wheels).

How to identify your axle ratio

Identifying your Sprinter's axle ratio is essential for proper maintenance, parts ordering, and understanding its performance characteristics. For Mercedes-Benz Sprinters, the most reliable way to find your axle ratio is typically through the vehicle data card or an RPO (Regular Production Option) sticker.

Unlike some domestic brands that place a clear RPO sticker on the door jamb with a specific axle code, Mercedes-Benz usually embeds this information in the vehicle's data card, which can often be accessed by a Mercedes-Benz dealer or through a VIN decoder specifically for Mercedes-Benz commercial vehicles. The three-digit axle code (e.g., A50, A51, A52) will be listed there. Sometimes, a sticker under the hood or in the glove compartment may also contain this information. If all else fails, a Mercedes-Benz dealership can provide a detailed build sheet by VIN.

Towing vs MPG impact

The axle ratio directly influences the powertrain's mechanical advantage. A numerically higher axle ratio (e.g., 4.727) means the engine will spin at a higher RPM for a given road speed. This provides more torque to the wheels, improving acceleration and increasing towing and hauling capacity. However, the trade-off is reduced fuel economy due to the engine working harder and consuming more fuel at cruising speeds.

Conversely, a numerically lower axle ratio (e.g., 3.923) results in lower engine RPMs at a given road speed. This reduces fuel consumption, leading to better MPG, especially during highway driving. The compromise is a reduction in available torque for towing and hauling, meaning the engine will have to work harder to move heavy loads, potentially leading to strain and reduced performance.

For Sprinter owners, selecting the right axle ratio at the time of purchase is critical. Those primarily using their Sprinter for light deliveries or highway cruising will benefit from a lower (numerically smaller) ratio for better fuel efficiency. Customers who frequently tow heavy trailers or operate at maximum Gross Vehicle Weight Rating (GVWR) will find the higher (numerically larger) ratios indispensable for maintaining performance and reducing stress on the drivetrain.

Common issues

While the Mercedes-Benz Sprinter driveline components are generally robust, like any mechanical system, they can experience wear and issues over time.

• Ring & Pinion Whine: A common symptom of wear or improper setup in the differential is a whining noise that changes with road speed and load. This can indicate worn gears, improper gear mesh, or worn pinions bearings.
• Carrier Bearing Wear: The carrier bearings support the differential carrier within the axle housing. Wear here can lead to humming or rumbling noises, especially when turning or accelerating, and can eventually cause play in the drivetrain.
• Limited-Slip Differential (LSD) Clutch Wear: If your Sprinter is equipped with an optional limited-slip differential, the clutch packs within can wear out over time. Symptoms may include shuddering or chattering during turns, especially at low speeds, or a reduction in traction assist on slippery surfaces. Regular fluid changes with the correct friction modifiers are crucial for LSD longevity.

Early diagnosis and professional repair are vital to prevent more extensive and costly damage to the differential and driveline components.

Find a driveline shop on Repairius.