The 5.7 Hemi itself does not come with one single differential. The rear axle/differential depends on the specific vehicle model and year in which the engine is installed. In practice, LX-family cars with a 5.7 Hemi commonly use an 8.25-inch rear axle, while Ram pickups featuring the 5.7 Hemi typically use a 9.25-inch rear axle; heavier-duty Ram 2500/3500 variants can use larger or different axle setups such as Dana 60. To know the exact differential for a given vehicle, check the VIN/build sheet or inspect the axle code on the differential housing.
Overview: how the 5.7 Hemi spans different platforms
The 5.7 Hemi is used across multiple models from Dodge/Chrysler and Ram. Because of this, the rear differential available with the engine varies by platform, trim level, and year. There isn’t a universal “5.7 differential”—instead you have a small set of common rear-axle configurations in use across different vehicles and production years.
LX-platform rear-axle options (Charger, Challenger, 300)
Across the Chrysler LX lineup, the 5.7 Hemi has been paired with a couple of common rear-axle sizes. The exact unit depends on trim, options, and year.
- 8.25-inch rear axle: a common size on many LX-era V8 models, typically with the option for a limited-slip differential on higher trims.
- 9.25-inch rear axle: used on selected LX variants to provide greater torque capacity, often paired with a limited-slip or electronic differential in performance packages.
Note: Exact gear ratios and LSD availability vary by model year and option group; consult the specific vehicle’s build information to confirm.
Ram pickups and heavy-duty models with a 5.7 Hemi
In Ram trucks that use the 5.7 Hemi, the rear differential options differ from the LX cars; the standard is a larger-case axle designed to handle heavier loads and higher torque.
- 9.25-inch rear axle: commonly found on many Ram 1500 models equipped with the 5.7 Hemi; typically available with limited-slip in higher trims or as an option.
- Heavy-duty axles (e.g., Dana 60 or other large-diameter differentials): used on 2500/3500 models with higher payload and torque requirements; LSD configurations vary by year and package.
As with LX cars, the exact differential depends on the specific year/model and option package; verify via VIN/build sheet or axle code for your vehicle.
How to confirm your vehicle’s differential
To be sure which differential your 5.7 Hemi has, use a few verification methods that work across most Chrysler, Dodge, and Ram models with this engine.
- Check the axle tag or stamped markings on the differential housing; codes often indicate the axle size (for example, “8.25” or “9.25”).
- Inspect the differential cover: its size, bolt pattern, and stamping can help identify the family (8.25" vs 9.25" vs Dana 60, etc.).
- Refer to the vehicle’s build sheet, window sticker, or VIN-based options list to confirm the axle/differential code.
- If needed, consult a dealership or service manual that lists axle/differential part numbers for your exact year/model.
Note: Variations due to model-year updates, optional packages, and aftermarket modifications mean you should verify with official sources for your exact vehicle.
Summary
The 5.7 Hemi does not come with a single differential. The rear axle depends on the model and year: LX cars with this engine commonly use an 8.25-inch rear axle, while Ram pickups typically use a 9.25-inch rear axle; heavier-duty Ram 2500/3500 variants may use larger or different axles such as Dana 60. To know the exact differential for a specific vehicle, check the VIN/build sheet or axle code on the differential housing.