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Transmission issues after New tires

RGdogman

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Jun 20, 2022
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I just bought new shoes (same size and rating) for my '21 Ram 1500(14k miles). After 4 days of driving I am down to 14.5 mpg from 17.6 mpg and the truck does not want to shift into 7th or 8th when it reaches adequate rpm. It will shift into 7 and 8 by feathering the throttle. At low speeds everything seems normal. Over 40 mph it now feels like I am pulling another vehicle behind me.

Eco mode does not engage properly and when it does engage, it has much lower mpg.

I pulled the fuse for what is labeled as the TCM and let it sit for a while. Plugged fuse in, waited >5mins and test drove. No difference.

I have an appointment on Tuesday at the stealer, but I need this truck asap. I am at a loss right now an any help would be much appreciated.
 

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