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What differential does a scat pack have?

Short answer: A Scat Pack uses a rear limited-slip differential, most commonly an electronically controlled limited-slip differential (ELSD) on modern examples. The exact setup can vary by year and transmission, so check the vehicle’s build sheet or VIN to be sure.

The Scat Pack is Dodge’s performance-oriented variant of the Challenger and Charger powered by the 6.4-liter Hemi. The rear differential is a key component that governs how torque is distributed to the rear wheels, particularly under aggressive acceleration and when cornering. This article explains what you typically get in current Scat Pack cars and how to verify the exact configuration on a given vehicle.

What to expect in a Scat Pack's rear differential

Below is a concise overview of the differential configurations you are most likely to encounter on Scat Pack models today.

Electronic limited-slip differential (ELSD) is standard on most recent Scat Pack configurations, providing controlled torque distribution to the rear wheels to improve traction during acceleration and cornering.

In some older or specific-era configurations, a mechanical (clutch-type) LSD was offered as an option or part of certain packages, but ELSD is the predominant setup in contemporary cars.

The exact differential type (ELSD vs. mechanical LSD) and any additional tuning can vary between Challenger and Charger, and between manual and automatic transmissions, so year-by-year confirmation is advised.

In practice, most current Scat Pack models deliver the benefits of an ELSD, delivering better grip and more confident handling from a standstill and through turns by adjusting the torque split between the rear wheels in real time.

How to verify your Scat Pack’s differential

To confirm the exact rear differential on your Scat Pack, use these checks and sources as a quick guide.

Check the window sticker or the build sheet for a designation such as “Limited Slip Differential” or an LSD option; this is the most straightforward confirmation.

Ask the dealer or use the vehicle’s VIN through Mopar/FCAS/Chrysler’s official build data to pull the exact factory options, including the differential type.

Inspect the differential cover or nearby labels for markings or part numbers associated with an LSD; some covers include a badge or stamp indicating the LSD type.

Review any equipped performance packages (for example, handling or performance package options) that historically included an LSD as part of the package contents.

If in doubt, have a trusted shop verify the differential type by inspection or by scanning the drivetrain’s electronic control data; the ELSD system is typically detectable via the car’s performance telemetry or service tools.

Verifying the exact differential is especially important if you are considering performance work, tire upgrades, or swapping to aftermarket pieces, since the compatibility and behavior can differ between ELSD and mechanical LSD setups.

Summary

The Scat Pack’s rear differential is predominantly an electronically controlled limited-slip differential (ELSD) in modern builds, designed to maximize traction and stability under sport driving. However, the precise configuration can vary by model year, transmission, and optional packages. To be certain, consult the vehicle’s build sheet, VIN data, or a dealership to confirm the exact LSD type installed on a specific Scat Pack.

What differential does a Hellcat have?

A stock Hellcat has a limited slip differential with a 2.62:1 gear ratio. However, many owners upgrade to a 3.09:1 limited slip differential, which is available from Mopar and Direct Connection, to improve acceleration. The newer 3.09 ratio offers better performance for many driving conditions and is often the preferred choice for those seeking better traction and acceleration off the line.

Stock Hellcat differential

Type: Limited Slip Differential (LSD)
Gear Ratio: 2.62:1

Upgraded Hellcat differential

Type: Limited Slip Differential (LSD)
Gear Ratio: 3.09:1
Benefit: Improved acceleration, especially in lower gears
Source: Available as a factory upgrade from Mopar and Direct Connection

Why upgrade?

While the stock 2.62:1 ratio is more forgiving on the street, the 3.09:1 ratio provides a significant boost in acceleration, making the car feel more powerful in the lower gears.
The 3.09 ratio is a popular upgrade for both manual and automatic transmissions and is designed to work with the Hellcat's high-horsepower engine.

Can a Scat Pack outrun a cop?

Superior power and insane speed don't mean police can't catch you. While a few law enforcement agencies have sprung for Dodge Hellcats and Scat Packs, those types of resources aren't all over the place. That means anyone with such a muscle car could conceivably outrun any cop pursuing them.

What gear ratio does a Scat Pack have?

Scat Pack models typically come with a 3.09 rear gear ratio for automatic transmissions or a 3.90 for manual transmissions. Some older or different versions may have a 2.62 ratio, while others might have a 3.90 (or similar) option for manuals, which provides quicker acceleration for drag or dig racing. Choosing between these depends on the intended use of the vehicle, as a higher numerical ratio like 3.90 will improve acceleration but lower the car's top speed and fuel efficiency compared to a lower ratio like 3.09 or 2.62.

This video shows a review of a Mopar 3.90 differential on a Scat Pack Charger: 49sSrtfied OfficialYouTube · Apr 10, 2021
Common gear ratios

3.09: Often paired with the automatic transmission, this ratio provides a good balance of acceleration and highway cruising. It's a common choice for automatic Scat Packs.
3.90: Typically found on manual transmission Scat Packs, this higher numerical ratio results in quicker acceleration from a stop, which is ideal for drag racing.
2.62: Some versions of the Scat Pack come with this ratio, which is better for fuel economy and higher top speeds compared to the 3.09 or 3.90 ratios.

What gear ratio means for you

Higher ratio (e.g., 3.90): Quicker acceleration off the line but reduced fuel efficiency and lower top speed. It is great for track or drag racing.
Lower ratio (e.g., 3.09): Better fuel economy and higher top speed compared to a higher ratio, with a good balance of performance for general street use.

What differential is in a Scat Pack?

2020 Dodge Charger Scat Pack Rear Axle Carrier Drive Ratio 3.09 Differential OEM.

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.