Truck "jerky" after larger tires installed

[RAMNC76]

Hey guys! Just wondering if anyone else has had similar issues after installing larger tires. I went from stock 285/60/20's to 35x12.50-20. When cruising, truck jerks and is really annoying. I have NOT had the speedo calibrated since the tire change. Could that be an issue? It honestly didn't change but maybe 1 mph. Any suggestions. Truck is a 2019 2500 CCCB CTD 4x4. Thanks in advance!!

 

[MtnRider]

Jerks how? Side to side, forward?


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[RAMNC76]

While driving, it's while in forward motion. Not side to side. Almost as if the converter is locking/unlocking.

 

[jadmt]

probably changed your speedo more than you think and speed is data that is used for shifting so might want to correct your speedo

35/12.5-R20 vs 285/60-R20 Tire Comparison - Tire Size Calculator | Tacoma World

285/60-R20 tires are 1.56 inches (39.6 mm) smaller in diameter than 35/12.5-R20 tires and the speedometer difference is 4.5%

www.tacomaworld.com

 

[MEGA HO]

 

[MtnRider]

I went to 35's on my 2016 and have no issues at all. I did correct the speedometer with alfaOBD though. You might just be cruising right at a shift point now? Maybe try driving in tow/haul mode and see if it acts differently.

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[RAMNC76]

I went to 35's on my 2016 and have no issues at all. I did correct the speedometer with alfaOBD though. You might just be cruising right at a shift point now? Maybe try driving in tow/haul mode and see if it acts differently.

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I have tried in tow/haul mode. Still acts the same way. It is more noticeable between 45-60 mph.

 

[Brewbud]

I ran a few days with 37s before doing speedo calibration. Mine didn't surge or do any jerking.