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  #1  
Old 11-12-2013, 10:19 PM
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didimauw didimauw is offline
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Question mds

mds is dissabled when i put it in tow/haul mode on short trips, ...but i still see really good gas mileage...maybe i dont fully understand mds mode?
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Old 11-12-2013, 10:55 PM
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MDS turns off in tow haul mode because MDS shuts off four cylinders for butter fuel mileage but less hp, therefore, tow haul mode turns off MDS so that you can maintain all the hp for towing.
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Old 11-13-2013, 12:27 AM
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4 cylinders!!?????

WOW i thought it was only 2.
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Old 11-19-2013, 09:34 PM
Joshua16 Joshua16 is offline
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MDS for me only made a difference on highway trips, around town stop and go it was more annoying for me than anything else - no noticeable increase in mpg's on or off. Eventually turned it off for good with a tuner. FWIW, putting it into '6' instead of 'D' should also disable mds.
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Old 12-10-2013, 07:56 PM
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I ran for 1 week with the MDS active and 1 week without it and didn't notice any mileage difference at all, even on the highway. 18-19mpg with or without all highway miles.
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Old 12-10-2013, 08:29 PM
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Will this work on my 2013 R/T by using the tow haul feature?
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Old 12-11-2013, 07:22 PM
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Remember when in Tow/Haul mode you are not using the 2 overdrive gears.
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Old 12-12-2013, 06:37 AM
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I could have swore mine shifted into 5th while in tow haul. It was at about 60 or so.
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Old 12-12-2013, 09:40 AM
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MDS is for poor sound, uneven cylinder wear(imo), poorer drivability, extra 25lbs of junk bolted to the truck, all for 2 mpg savings when coasting haha.
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Old 12-12-2013, 05:09 PM
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So is there any long term issues with having the MDS deactivated? I have been doing the manual option to disable it. I plan on purchasing a tuner, but want to make sure there will be no warranty or engine issues later.
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