Vibes when driving

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Forsaken82

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Feb 8, 2021
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Location
27529
Ram Year
2015
Engine
6.7
I recently got a 2015 ram. 6.7 ccsb.
The truck has 295/70/r18s on it.
65k on the clock.
The truck is phenomenal but im im trying to sort out a issue. During city or urban area driving it likes to shift early it feels like. Rpms will drop to 1k and it gets some vibration. Feels like a manual that you need to downshift. If i put it in tow/haul it doesnt do it.

Anyone have any ideas? Some have told me to tune it, but i dont have the cash to do a tune in it currently. ( Truck was a unexpected purchase due to my truck being totaled)

I corrected the speedo and that just moved the shift to a slightly higher speed, with the same result. I also did a relearn on the trans through alfaobd.T
Tire rotation didnt change aanything, u joints seem to be OEM, and i dont feel any play in them.
 
Last edited:

BigJoe1094

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Mar 9, 2014
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Location
Somerset County, NJ
Ram Year
2015
Engine
5.7L Hemi
unfortunately not the answer you were looking for but i had the same issue on my 5.7 and once i put the trans tune in it shifts 1000x better.
 
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Forsaken82

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Location
27529
Ram Year
2015
Engine
6.7
I feel like if it would bump it about 250 rpms before it shifts to overdrive it would be perfect.
 
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