Towing questions (Hemi) - Jeep Commander Forums: Jeep Commander Forum
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post #1 of 4 (permalink) Old 04-13-2012, 10:53 AM Thread Starter
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Towing questions (Hemi)

I have a question, what exactly does tow/haul mode do? I have a 2010 with a hemi and qd2...I'm just wondering how much of a change is made. Thanks guys!
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post #2 of 4 (permalink) Old 04-13-2012, 11:06 AM
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From the 2010 Owner's Manual:

Using the TOW/HAUL mode (if equipped) or a
lower gear range while operating the vehicle under
heavy operating conditions, will improve performance
and extend transmission life by reducing excessive shifting
and heat buildup. This action will also provide better
engine braking.

2006 Steel Blue 5.7L HEMI Limited 4x4 Build Date: June 9, 2006 Hour 14
Interior: Dark Slate/Light Graystone with Saddle Brown Leather Seats
Quadra-Drive II, NAV, DVD, Trailer Tow Group IV, Off-Road Group II, Remote Start, UConnect, Rear Backup Camera, Chrome Wheels,
Magnaflow cat-back exhaust, Daytime Running Lights enabled, 2" Rough Country Lift with 265/70R17 Goodyear Wrangler AT/S
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post #3 of 4 (permalink) Old 04-13-2012, 11:07 AM
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the tow haul button locks out your overdrive so you dont burn up your transmission going up and down hills
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post #4 of 4 (permalink) Old 04-13-2012, 01:27 PM
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When towing (in some vehicles), a “Tow/Haul” mode provided crisper shifts to cut wear on the transmission, and reduced gear searching by holding lower gears longer. The system also selected lower gears when going downhill, to use the engine’s braking capability. In 2006, Chrysler claimed that the transmission had been “refined for higher-quality shifts;” it was strong enough to give the Jeep Commander and Grand Cherokee class-leading towing capacity of 7,200 lbs. The changes included a redesigned solenoid to provide quieter operation when shifting (ending “solenoid clatter”), and a turbine damper to cut noise and vibration from the torque converter.

http://www.allpar.com/mopar/transmissions/545RFE.html
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