2022 Jeep Grand Cherokee Transmission & Axle Gear Ratios

Whether you are upgrading your drivetrain for off-road trails, optimizing for towing, or just replacing a worn-out component, understanding the transmission and axle gear ratios of your 2022 Jeep Grand Cherokee is essential. This guide breaks down the factory specifications, available axle options, and how these numbers impact your vehicle's performance.

Transmission gear ratios

The 2022 Jeep Grand Cherokee utilizes the renowned ZF-sourced 8-speed automatic transmission. Depending on your engine choice, your Jeep will be equipped with either the 850RE (paired with the 3.6L Pentastar V6 and 2.0L 4xe) or the 8HP70 (paired with the 5.7L HEMI V8). Both transmissions offer an incredibly wide gear spread to balance low-end grunt and highway fuel efficiency.

TorqueFlite 850RE 8-Speed Automatic (3.6L V6 & 4xe)

TorqueFlite 8HP70 8-Speed Automatic (5.7L V8)

Available axle ratios

Jeep offers a few distinct axle ratios for the 2022 Grand Cherokee, tightly tied to the engine option selected.

How to identify your axle ratio

Unlike GM trucks that use a distinct door-jamb RPO sticker, Jeep vehicles require a slightly different approach to identifying exactly what is inside the differential housings.

• Look at the Axle Tag: The most direct way to check your ratio is by sliding under the rear of the Jeep and locating the physical tag bolted or stuck to the differential cover. This tag will typically display the exact ratio (e.g., "3.45").
• Check the Build Sheet / Window Sticker: If you still have the original window sticker or the factory build sheet, the axle ratio will be listed under the standard or optional equipment sections.
• Use a VIN Decoder: Fiat Chrysler (Stellantis) provides detailed build sheets online. By entering your Grand Cherokee's 17-digit Vehicle Identification Number (VIN) into a reputable Mopar VIN decoder, you can see every factory-installed specification, including the front and rear axle ratios.

Towing vs MPG impact

When it comes to axle ratios, you are always playing a game of tug-of-war between pulling power and fuel efficiency.

A numerically higher ratio (like the 3.70 on the 4xe) means the driveshaft spins more times for every single rotation of the tires. This multiplies engine torque, making it easier for the vehicle to accelerate off the line and pull heavy loads (better for towing and off-roading). However, it also means the engine runs at higher RPMs on the highway, which can negatively impact fuel economy.

A numerically lower ratio (like the 3.09 on the V8) reduces the engine RPM at cruising speeds. Because the massive 5.7L HEMI already produces immense low-end torque, it doesn't need as much gearing multiplication as the V6. The lower ratio keeps the engine calm on the highway, resulting in better MPG and a smoother high-speed ride.

Common issues

The 2022 Jeep Grand Cherokee is built on an advanced platform, but owners should keep an eye on a few driveline-related issues as mileage accrues:

• Electronic Limited-Slip Differential (eLSD) Wear: Models equipped with the Quadra-Drive II system (like the Trailhawk) use an eLSD in the rear. Over time, or with heavy off-road use, the clutch packs within this differential can wear down or require precise fluid and friction modifier replacements to prevent shuddering during tight turns.
• Ring & Pinion Whine: If the vehicle has been subjected to heavy towing without proper differential fluid changes, you may develop a high-pitched whine from the rear axle on acceleration or deceleration, indicating gear wear.
• ZF 8-Speed Pan Leaks: The 8-speed automatic features a plastic transmission fluid pan that integrates the filter. Over time and heat cycles, this pan can warp slightly, leading to minor fluid seeps.

Find a driveline shop on Repairius. If you are experiencing axle whine, differential chatter, or transmission shifting issues, don't wait for a total failure. Use Repairius.com to find a certified driveline specialist in your area today!