Im starting to think these auto trans are junk

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Longhauler

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Illinois
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2011
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Cummins 6.7
This shudder is starting to **** me off. I tow my 10,000lb 5th wheel in tow haul and exhaust brake on. It shudders when I go up a slight hill in the road. The truck doesn't shift it just stay's in 6th. I had a Dodge mechanic ride along with me the other night while towing and he thinks there is nothing wrong it just too much for 6th gear to handle and said when it starts doing it shift down to 5th.

I just don't think I should have to do this, shouldn't it shift down on its own if it needs too. He also said no one else has complained of this happening. I did put a Smarty Jr. with delete pipe and I run it in tow mode could it be that? should I put everything back to stock?

Thanks for any advice you guys might have to offer. There's only 12,000 miles on her
 

Stangshcky12

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What time are you running? That could be it, I really don't have any experience with 68re but isn't tow haul mode supposed to keep it out of OD?
 
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Longhauler

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I didn't change the timing setting so I'm guessing it is factory, but not positive.
 

Cthulhu

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If its like the T/H mode in my truck, no it does not keep you out of OD. It allows O/D but shift points are higher in RPM, and it downshifts to assist in descent control. OD Off is the only one that locks out O/D, but it also uses the modified shift points. I think I got the 46RE or something like thtat.
 

jpex

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i have a 2012 3500 and have pulled my 10000+ lb trailer up all kinds of hills without any shutter maybe its the tune? maybe remove the tune and retry? (i'm not to sure whats involved with the shorty (newb here lol)
 

Trupiano

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Hometown : Puyallup,WA Stationed : Little Rock,
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2010 Ram 2500 6.7L CTD Crew Cab
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Have you attempted any other tunes while towing? Try towing on a different setting and see if the truck responds differently. If you can pinpoint a certain tune, or the tuner itself then it's not your trans fault.
 
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