The 2024 Jeep Rubicon features an automatic transmission with a very low first gear ratio designed for technical rock crawling. Understanding the 2024 Jeep Rubicon auto transmission ratios is key to appreciating how this vehicle handles extreme off-road trails. These numbers directly affect torque multiplication, crawling speed, and overall drivability.
This article breaks down every gear ratio in the 8-speed automatic transmission. You will learn how each ratio impacts performance on rocks, mud, and sand. We also compare the auto to the manual transmission option.
2024 Jeep Rubicon Auto Transmission Ratios
The 2024 Jeep Rubicon comes standard with the TorqueFlite 8HP75 eight-speed automatic transmission. This gearbox is built to handle the 3.6L V6 or the 2.0L turbocharged four-cylinder engine. The ratios are designed for both low-speed crawling and highway cruising.
Here are the exact gear ratios for the 8-speed automatic in the 2024 Rubicon:
- 1st Gear: 4.71:1
- 2nd Gear: 3.13:1
- 3rd Gear: 2.10:1
- 4th Gear: 1.67:1
- 5th Gear: 1.28:1
- 6th Gear: 1.00:1
- 7th Gear: 0.84:1
- 8th Gear: 0.67:1
- Reverse: 3.30:1
The first gear ratio of 4.71:1 is extremely low. This gives the Rubicon massive torque at idle speed. You can crawl over large boulders without touching the gas pedal. The transmission also has a deep reverse ratio for backing down steep obstacles.
How The Ratios Compare To The Manual Transmission
The 2024 Rubicon also offers a six-speed manual transmission. The manual has different ratios that favor driver control. Here is a quick comparison:
- Manual 1st Gear: 4.46:1
- Manual 2nd Gear: 2.61:1
- Manual 3rd Gear: 1.72:1
- Manual 4th Gear: 1.25:1
- Manual 5th Gear: 1.00:1
- Manual 6th Gear: 0.84:1
The automatic has a lower first gear (4.71 vs 4.46). This means the auto version crawls slower at idle. The manual has closer ratios in the mid-range, which some drivers prefer for technical trails. But the automatic’s 8th gear (0.67:1) gives better highway fuel economy than the manual’s 6th gear (0.84:1).
Transfer Case Ratios And Crawl Ratio
The 2024 Rubicon uses a Rock-Trac transfer case with a 4:1 low-range ratio. This is the same as previous years. When you combine the transmission’s first gear with the transfer case low range and axle gearing, you get the crawl ratio.
The standard axle ratio for the 2024 Rubicon automatic is 3.73:1. The optional axle ratio is 4.10:1. Here is how the crawl ratio works out:
- Standard (3.73 axles): 4.71 x 4.0 x 3.73 = 70.2:1 crawl ratio
- Optional (4.10 axles): 4.71 x 4.0 x 4.10 = 77.2:1 crawl ratio
A crawl ratio above 70:1 is considered excellent for rock crawling. The 2024 Rubicon automatic with 4.10 axles gives you a 77.2:1 crawl ratio. This is one of the best in the midsize SUV segment.
Why The First Gear Ratio Matters For Off-Roading
A low first gear ratio lets you crawl at walking speed without riding the brakes. The 4.71:1 ratio in the 2024 Rubicon automatic means the engine can idle over obstacles. You do not need to rev the engine or slip the clutch.
This is critical for technical trails like the Rubicon Trail or Moab. When you are on loose rocks, a steady idle crawl keeps traction. Sudden throttle inputs can cause wheel spin. The deep first gear minimizes that risk.
The transmission also has a feature called “Selec-Speed Control.” This acts like a low-speed cruise control. You set a speed between 1 and 6 mph, and the transmission manages the gear and brakes. The low first gear makes this system more effective.
Highway Performance And Overdrive Gears
The 2024 Rubicon automatic has two overdrive gears: 7th (0.84:1) and 8th (0.67:1). These ratios drop engine RPM at highway speeds. For example, at 70 mph, the 3.6L V6 turns about 1,800 RPM in 8th gear. This saves fuel and reduces engine noise.
Compare that to the manual transmission, which has only one overdrive gear (0.84:1). At 70 mph, the manual turns about 2,200 RPM. The automatic is clearly better for long highway trips.
The 8th gear ratio also helps with towing. The 2024 Rubicon can tow up to 3,500 pounds. The tall overdrive keeps the engine in its power band without screaming.
Gear Ratio Impact On Fuel Economy
The 2024 Jeep Rubicon automatic gets an EPA-estimated 17 mpg city and 22 mpg highway. The wide gear spacing helps achieve these numbers. The low first gear gets you moving easily in traffic, while the tall 8th gear reduces highway RPM.
If you choose the optional 4.10 axle ratio, highway fuel economy drops slightly. You might see 16 mpg city and 21 mpg highway. The trade-off is better off-road crawling ability.
How The Transmission Shifts In Different Modes
The 8-speed automatic has several shift modes that change how the gear ratios are used:
- Auto Mode: Shifts smoothly for everyday driving. Uses all eight gears.
- Sport Mode: Holds gears longer and downshifts quicker. Uses lower ratios more aggressively.
- Manual Mode: Lets you select gears with the shift lever or paddle shifters. You control which ratio is used.
- Off-Road Mode: Keeps the transmission in lower gears. Prevents upshifts on steep climbs.
In Off-Road mode, the transmission will not shift into 8th gear. It stays in 1st through 6th for better engine braking and torque. This is ideal for descending steep hills.
Common Questions About The 2024 Rubicon Auto Ratios
Many buyers wonder if the automatic transmission is reliable for heavy off-road use. The 8HP75 is a proven design used in Ram trucks and Dodge Chargers. It handles high torque and heat well. The 2024 version has a reinforced torque converter for off-road abuse.
Another question is whether you can regear the axles. Yes, you can install aftermarket ring and pinion sets. Common upgrades are 4.56 or 4.88 ratios. This changes the crawl ratio significantly. For example, with 4.88 axles, the crawl ratio becomes 4.71 x 4.0 x 4.88 = 91.9:1.
Some owners ask about towing with the 8-speed. The transmission has a tow/haul mode that adjusts shift points. It holds lower gears longer to keep the engine in the power band. The 0.67:1 overdrive still works for empty highway cruising.
Comparison To Previous Year Models
The 2024 Rubicon automatic uses the same 8HP75 transmission as the 2023 model. The gear ratios are identical. The only change is software tuning for the 2.0L turbo engine. The turbo model gets slightly different shift points for better low-end torque.
Compared to the 2022 model, the 2024 has no ratio changes. Jeep has kept the same gear set since 2018. This consistency means aftermarket parts and tuning are widely available.
Aftermarket Tuning And Ratio Adjustments
You can reprogram the transmission control module (TCM) for different shift behavior. Tuners like Superchips or DiabloSport offer custom calibrations. These can firm up shifts and change when the transmission uses each gear ratio.
Some tuners also adjust the torque converter lockup schedule. This can improve fuel economy or towing performance. However, tuning may void your warranty. Check with your dealer before making changes.
Real-World Driving Impressions
On the highway, the 2024 Rubicon automatic feels relaxed. The 8th gear ratio keeps RPM low, so the cabin is quiet. Passing requires a downshift to 6th or 5th gear, which happens quickly.
Off-road, the first gear is incredibly low. You can creep over rocks at 1 mph without touching the brake. The transmission does not hunt for gears. It stays in 1st until you manually upshift or hit the rev limiter.
On steep descents, the low first gear combined with the transfer case gives excellent engine braking. You rarely need to use the brakes. This reduces brake fade on long downhill sections.
Maintenance And Fluid Considerations
The 8HP75 transmission uses ZF Lifeguard 8 fluid. Jeep says the fluid is “lifetime,” but many owners change it every 60,000 miles for heavy off-road use. The transmission has a spin-on filter that should be replaced during fluid changes.
Overheating can be a concern in extreme off-road conditions. The 2024 Rubicon has a transmission cooler as standard. If you do hardcore rock crawling, consider an aftermarket cooler for extra protection.
How The Ratios Affect Tire Size Changes
If you upgrade to larger tires, the effective gear ratio changes. For example, going from 33-inch tires to 35-inch tires reduces the effective crawl ratio. You lose some low-speed torque.
To compensate, you can regear the axles. A common upgrade for 35-inch tires is 4.56 gears. For 37-inch tires, 4.88 or 5.13 gears are recommended. This brings the crawl ratio back to optimal levels.
Here is a quick guide:
- 33-inch tires: Stock 3.73 or 4.10 works fine
- 35-inch tires: Regear to 4.56 for best performance
- 37-inch tires: Regear to 4.88 or 5.13
- 40-inch tires: Regear to 5.38 or 5.89
The 8-speed transmission handles these regears well because it has a wide ratio spread. The low first gear still provides good crawling even with larger tires.
Frequently Asked Questions
Q: What is the crawl ratio of the 2024 Jeep Rubicon automatic?
A: With standard 3.73 axles, the crawl ratio is 70.2:1. With optional 4.10 axles, it is 77.2:1.
Q: Is the 2024 Rubicon automatic transmission good for rock crawling?
A: Yes. The 4.71:1 first gear and 4:1 transfer case make it excellent for slow-speed crawling.
Q: Can I tow with the 2024 Rubicon automatic?
A: Yes, up to 3,500 pounds. The 8-speed has a tow/haul mode for better shift control.
Q: What is the difference between the auto and manual transmission ratios?
A: The auto has a lower first gear (4.71 vs 4.46) and two overdrive gears. The manual has closer ratios in the middle gears.
Q: Do I need to regear for 35-inch tires on the 2024 Rubicon automatic?
A: Not strictly required, but regearing to 4.56 improves performance and fuel economy.
Final Thoughts On The 2024 Rubicon Auto Ratios
The 2024 Jeep Rubicon auto transmission ratios are carefully chosen for dual-purpose use. The 4.71:1 first gear gives you serious crawling capability. The 0.67:1 8th gear provides comfortable highway cruising. This combination makes the Rubicon one of the most versatile off-road vehicles available.
Whether you are tackling the Rubicon Trail or commuting to work, the 8-speed automatic delivers. The ratios are optimized for the 3.6L V6 and 2.0L turbo engines. With the optional 4.10 axle ratio, you get a near-perfect balance of low-speed torque and highway efficiency.
If you are considering a 2024 Rubicon, the automatic transmission is a strong choice. The gear ratios are proven and reliable. Just remember to factor in tire size and axle ratio when planning your build. The transmission can handle almost anything you throw at it.