How To Convert A 2011 Jeep Grand Cherokee 5.7 Hemi To RWD: The Complete Technical Guide

Converting a 2011 Jeep Grand Cherokee equipped with the 5.7L Hemi V8 and Quadra-Trac II or Quadra-Drive II systems to Rear-Wheel Drive (RWD) requires a systematic bypass of the active transfer case control module or the physical removal of the front rotational assembly. To achieve a successful RWD conversion without triggering permanent limp mode, the vehicle must maintain wheel speed sensor integrity while disabling the MP3023/MP3022 transfer case clutch engagement, effectively routing 100% of the 390 lb-ft of torque to the rear differential.

Pre-Conversion Technical Assessment and Equipment Requirements

Before attempting to modify the drivetrain of a 2011 WK2 platform, it is essential to identify the specific transfer case and transmission pairing. Most 2011 5.7L Hemi models utilize the 545RFE 5-speed automatic transmission paired with the MP3023 (two-speed) or MP3022 (single-speed) transfer case. Unlike older manual-shift transfer cases, these units are electronically controlled via the Drivetrain Control Module (DTCM), which uses pulse-width modulation (PWM) to apply a clutch pack that engages the front driveshaft.

Essential Gear and Tool Inventory

• Electronic Interface: An OBDII-based programmer such as the Z-Automotive Tazer WK2 is the industry standard for non-permanent electronic RWD toggling.
• Mechanical Tools: A 1/4-inch and 3/8-inch drive socket set, specifically including 8mm and 10mm sockets for front driveshaft flange bolts.
• Measurement Tools: A digital torque wrench capable of measuring 20 to 100 lb-ft.
• Safety Equipment: Heavy-duty jack stands (3-ton minimum) and a floor jack with a minimum 20-inch lift height.
• Diagnostic Hardware: An advanced bi-directional scan tool (e.g., Autel or Snap-On) to clear "Service 4WD" codes and monitor wheel speed sensor data.

Prerequisite Knowledge and Safety Standards

• Drivetrain Stress: Operating a 5,200-pound SUV in RWD mode places 100% of the Hemi's torque on the rear driveshaft, U-joints, and differential. Ensure the rear gear set is properly lubricated with 75W-85 or 75W-140 synthetic gear oil.
• Regulatory Compliance: Modifying a factory 4WD system may affect vehicle stability control performance; this modification is typically reserved for track use, dyno testing, or off-road maneuvers.
• Estimated Duration: 15 minutes for electronic bypass; 90 minutes for mechanical driveshaft removal.

Step-by-Step Methodologies for RWD Conversion

Step 1: The Electronic Software Bypass (Recommended Method)

The most sophisticated way to achieve RWD in a 2011 Jeep 5.7 is through the CAN-bus system. This method tricks the DTCM into keeping the transfer case clutch fully open.

1. Plug the specialized programmer into the OBDII port located under the driver-side dashboard.
2. Navigate through the steering wheel EVIC (Electronic Vehicle Information Center) menu using the "Back" and "OK" buttons to locate the "Drivetrain" or "Performance" sub-menu.
3. Select the "RWD Mode" or "Force RWD" option. This command sends a signal to the DTCM to cease PWM voltage to the transfer case motor.
4. Verify the conversion by observing the instrument cluster; the "Traction Control Off" light will typically illuminate, indicating the system is no longer managing four-wheel slip.

Pro-Tip: Using a software bypass allows for "on-the-fly" switching, which preserves the longevity of the transfer case internal clutches compared to mechanical methods that may cause the internal oil pump to run dry if the input shaft is spinning without output resistance.

Step 2: The DTCM Fuse Isolation (Budget Method)

If a programmer is unavailable, you can manually disable the electronic brain of the 4WD system.

1. Locate the Totally Integrated Power Module (TIPM) under the hood on the passenger side.
2. Open the fuse box cover and identify the fuse responsible for the Drivetrain Control Module. On most 2011 WK2 models, this is Fuse J11 (30 Amp) or M11, depending on the specific build date.
3. Remove the fuse using the plastic puller tool provided in the lid.
4. Start the engine. The "Service 4WD" light will appear on the dashboard. This indicates the transfer case motor is de-energized, leaving the vehicle in its default RWD bias.

Warning: Pulling the DTCM fuse often disables the Electronic Stability Control (ESC) and Anti-lock Braking System (ABS) because the vehicle can no longer accurately predict torque distribution. Exercise extreme caution in wet or slippery conditions.

Step 3: Mechanical Front Driveshaft Removal (Hard Conversion)

For dedicated drag racing or dyno applications where you want to eliminate rotational mass and parasitic loss, physical removal is necessary.

1. Raise the vehicle on four jack stands to ensure it is level and the wheels can rotate freely.
2. Locate the front driveshaft connecting the transfer case to the front differential.
3. Using an 8mm socket, remove the six bolts holding the CV-style joint to the transfer case output flange.
4. Move to the front differential side and remove the remaining bolts. If the bolts are seized, apply a penetrating catalyst and allow it to sit for ten minutes.
5. Carefully slide the driveshaft out of the vehicle. Do not drop the shaft, as denting the tube will cause severe vibration if it is ever reinstalled.
6. Secure the transfer case output flange. Since the 2011 MP3023 uses a sealed flange, you do not need to worry about fluid leakage, but you should cover the splines with a protective cap to prevent debris ingress.

Drivetrain Specifications and Compatibility Matrix

The following table outlines the technical parameters for the 2011 Jeep Grand Cherokee 5.7L Hemi drivetrain to assist in calculating torque loads during RWD operation.

Common Drivetrain Failures and Actionable Fixes

Converting a vehicle designed for AWD into RWD introduces specific mechanical stresses. Monitoring these failure points is critical for maintaining vehicle health.

• Scenario: "Service 4WD" Light and Engine Limp Mode

  
  
  
  • Root Cause: The Powertrain Control Module (PCM) detects a mismatch between front and rear wheel speeds or a total lack of communication with the DTCM, causing the engine to limit RPM to 3,000 to protect the transmission.
  • Actionable Fix: Re-insert the DTCM fuse and use a high-end OBDII scanner to perform a "Proxi Alignment" or "DTCM Reset." If using a programmer, ensure the firmware is updated to the latest version compatible with the 2011 MY (Model Year) software architecture.

• Scenario: Rear Differential "Chirp" or Binding

  
  
  
  • Root Cause: If your 2011 Jeep has the Quadra-Drive II system, it features an Electronic Limited Slip Differential (ELSD). In RWD mode, the computer may attempt to lock the rear differential clutches aggressively during turns.
  • Actionable Fix: Add 4 ounces of Limited Slip Additive (Friction Modifier) to the rear differential fluid. This reduces clutch chatter and ensures smooth engagement when the electronic actuator is not receiving standard 4WD-logic signals.

• Scenario: Excessive Vibration Above 50 MPH

  
  
  
  • Root Cause: Removing the front driveshaft changes the harmonic balance of the transfer case output. Alternatively, the rear driveshaft may have an existing imbalance that was masked by the front-end tension.
  • Actionable Fix: Inspect the rear driveshaft center support bearing (carrier bearing). If the rubber isolated mount is cracked, the increased torque load of RWD-only operation will exacerbate the vibration. Replace the carrier bearing or the entire rear two-piece shaft assembly.

• Scenario: Transfer Case Overheating

  
  
  
  • Root Cause: In the MP3023, the internal oil pump is driven by the rotation of the main shaft. If the vehicle is towed or operated in a way that prevents proper fluid circulation while the internal clutches are slipping, temperatures can spike.
  • Actionable Fix: Ensure you are using a software bypass that fully disengages the clutch rather than a "halfway" engagement. Change the transfer case fluid every 15,000 miles if the vehicle is frequently operated in RWD mode for performance driving.

Frequently Asked Questions

Can I do burnouts safely once the Jeep is in RWD mode?

While the 5.7L Hemi has sufficient torque to break traction in RWD mode, the 2011 Grand Cherokee uses a complex multi-link rear suspension with rubber bushings. Repeated "shock loading" from burnouts can lead to premature failure of the rear subframe bushings and differential mounts. It is highly recommended to install polyurethane differential inserts if you plan on frequent high-torque RWD launches.

Will converting to RWD improve my fuel economy?

The fuel economy gains are negligible, typically less than 0.5 MPG. Even in RWD mode, the front axles, hubs, and differential gears still rotate (driven by the wheels), meaning the aerodynamic and mechanical drag remains. The only way to see significant MPG gains is to install manual locking hubs, which is not a feasible modification for the WK2's independent front suspension architecture.

Is the RWD conversion reversible for winter driving?

Yes, if you use the software or fuse method, the process is 100% reversible in seconds. If you mechanically remove the front driveshaft, it can be reinstalled, but you must ensure the bolt holes are cleaned of old thread-locker and that new blue Loctite is applied to the 8mm/10mm flange bolts to prevent them from backing out due to vibration.

Does the 2011 Jeep 5.7 have a "Hidden" RWD mode?

There is no hidden factory menu for RWD on the 2011 model. While later SRT models have a "Track Mode" with a 30/70 torque split, the standard 5.7L Hemi requires third-party electronic intervention or fuse manipulation to reach a 0/100 RWD bias.

Will this modification void my warranty?

As the 2011 Jeep Grand Cherokee is well outside the factory powertrain warranty period, the primary concern is insurance and safety inspections. Some jurisdictions require all factory-installed safety and drivetrain systems to be operational. Always check local regulations before performing a permanent mechanical delete of the 4WD system.

Professional Drivetrain Optimization

For owners looking to maximize the performance of their RWD-converted Jeep, upgrading to a high-stall torque converter and a custom TCM (Transmission Control Module) tune will significantly enhance the Hemi's power delivery. Ensure your cooling system is pressurized and leak-free to handle the increased thermal load on the transmission during spirited RWD sessions.