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I am planning to order an Overland diesel 4x4 and will be towing it behind my motorhome. Do any of the transmission options have any restrictions or special requirements when towing with the transfer case in neutral? Or can they all be flat towed with no problems?

Super_Rep
 

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Should be no problem. There is a way to disengage the front and rear axles from the trans via the transfer case. I cut and paste the steps from the manual below. By the way, you if you google 2014 Jeep Grand Cherokee Manual you can get your hands on a full PDF manual for your reading pleasure. :)

Recreational Towing — 4WD Models with 2-Speed Power Transfer Unit
The power transfer unit must be shifted into NEUTRAL (N) and the transmission must be in PARK for recreational towing. The NEUTRAL (N) selection button is adjacent to the power transfer unit selector switch. Shifts into and out of NEUTRAL (N) can take place with the selector switch in any mode position.
CAUTION!
• DO NOT dolly tow any 4WD vehicle. Internal damage to the transmission or power transfer unit
will occur if a dolly is used when recreational towing.
• Tow only in a forward direction. Towing this vehicle backwards can cause severe damage to the
power transfer unit.
• The transmission must be in PARK for recreational towing.
•Before recreational towing, perform the procedure outlined under “Shifting into NEUTRAL (N)” to be
certain that the power transfer unit is fully in NEUTRAL (N). Otherwise, internal damage will result.
• Failure to follow these procedures can cause severe transmission and/or power transfer unit damage.
Damage from improper towing is not covered under the New Vehicle Limited Warranty.
•Do not use a bumper-mounted clamp-on tow bar on your vehicle. The bumper face bar will be damaged.
Shifting Into NEUTRAL (N)
WARNING!
You or others could be injured or killed if you leave the vehicle unattended with the power transfer unit
in the NEUTRAL (N) position without first fully engaging the parking brake. The NEUTRAL (N) position disengages both the front and rear driveshafts from the powertrain and will allow the vehicle to move, even if the transmission is in PARK. The parking brake should always be applied when the driver is not in the vehicle.

Use the following procedure to prepare your vehicle for recreational towing.

CAUTION!
It is necessary to follow these steps to be certain that the power transfer unit is fully in NEUTRAL (N)
before recreational towing to prevent damage to internal parts.

1. Bring the vehicle to a complete stop and shift the transmission to PARK.
2. Turn the engine OFF.
3. Turn the ignition switch to the ON/RUN position, but do not start the engine.
4. Press and hold the brake pedal.
5. Shift the transmission into NEUTRAL.
6. Using a ballpoint pen or similar object, press and hold the recessed NEUTRAL (N) button (located by the selector switch) for four seconds. The light behind the NEUTRAL (N) symbol will blink, indicating shift in progress. The light will stop blinking (stay on solid) when the shift to NEUTRAL (N) is complete.
7. After the shift is completed and the NEUTRAL (N) light stays on, release the NEUTRAL (N) button.
8. Start the engine.
9. Shift the transmission into REVERSE.
10. Release the brake pedal for five seconds and ensure that there is no vehicle movement.
11. Shift the transmission to NEUTRAL.
12. Apply the parking brake.
13. Shift the transmission into PARK, turn the engine OFF, and remove the key fob.
14. Attach the vehicle to the tow vehicle using a suitable tow bar.
15. Release the parking brake.
NOTE:
• Steps 1 through 5 are requirements that must be met prior to pressing the NEUTRAL (N) button, and must continue to be met until the shift has been completed. If any of these requirements are not met prior to pressing the NEUTRAL (N) button or are no longer met during the shift, then the NEUTRAL (N) indicator light will flash continuously until all requirements are met or until the NEUTRAL (N) button is released.
• The ignition switch must be in the ON/RUN position for a shift to take place and for the position indicator lights to be operable. If the ignition switch is not in the ON/RUN position, the shift will not take place and no position indicator lights will be on or flashing.
• A flashing NEUTRAL (N) position indicator light indicates that shift requirements have not been met.
 

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We towed our 2015 Summit diesel 4x4 all over the place with no problems behind our Tiffin Phaeton DP. Just follow the directions in the OM.

We use the Air Force 1 braking system and magnetic wireless turn signals.
 
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