Transmission Hard Shifting

[CarbonMetal553]

I finally got my truck fixed with the A/C issue after multiple visits and rentals being graciously provided by local dealer. However, my transmission is shifting hard, like the whole truck feels like it runs over a speedbump. This happens in gears 6-9 going uphill or accelerating at a decent rate of speed like 50-75 mph rapidly.

I feel like it has gotten worse. I just want to drive the dang thing and not have to bother my service advisor so much.

I came from a 2023 Tundra that I traded for this truck because it literally died in the middle of the road doing 45mph and after all the quality issues I read about, I got rid of it. I'm wondering what I should do now.

2023 STX 5.0L
12K Miles
Had the tranny "re-flashed" once already.

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[Jerome10]

Is it possible that the A/C fix may have also updated the PCM (I think that's the right term... the transmission software) and therefore an adaptive learning reset was performed?

I wouldn't be surprised. My suggestion would be give it a few more days and see if it smooths out.

I can relate to the "just want to drive the dang thing".... I just "notice" my transmission almost constantly.

 

[dmac]

Mine shifted like total garbage after disconnecting the battery for a while. Now, after ~800 miles it's way better. Not perfect, but well within tolerable.

If you did in fact have a PCM update, I would say that the jerkiness is expected for a bit. Do your best not to switch fuel grades as I've noticed that confuses it.

I'd also have someone check the fluid level to make sure.

 

[22Platinum]

I'd also have someone check the fluid level to make sure.

Right if it's as bad as you say, I'd jump under there with a 19mm flex head ratchet wrench with it running in park and cold and make sure it's just barely on the stick

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