Thank you so much! I thought I was the only one having this issue. It's been driving me crazy for the last year. My truck does the exact same thing in manual shift mode only after 3k. Does yours still do it in manual mode after the re-program?
I have a bit of an odd issue with my 2019 8 speed transmission. Theres a slight vibration that can be felt and heard when going over 3K RPM in second gear. The dealership says it's "normal operation". Is it worth taking it to a different dealership or is it just something these transmissions do? I think it maybe happening in a higher gear as well over 3k RPM but I've only noticed it once when merging on to a highway.
Where did you get yours from?
I'm guessing this is normal operation but when the engine is cold my oil pressure sits around 500 - 700 kpa (72.5 - 101.5 psi). When the engine warms up after 10+ min it goes to around 400 kpa (58 psi). I just never noticed the oil pressure going that high on my 2014. I also noticed the engine runs a bit cooler on my 2019 over my 2014. The engine temp has never gone over 90 C (194 F) even on a hot day.
Just to add to this. I drove the truck for the first time in Auto 4WD today. The resonating/vibration was way more pronounced. It only did it for 5-10 seconds I sped up a bit and it went away. I don't think thats right at all. My 2014 Silverado never did anything like this.
Not sure if this is "normal operation" or not but it seem like the engine resonates intermittently when cruising at constant low RPM. The speed doesn't seem to make a difference although it is more noticeable at highway speeds than lower speeds. Is this just how these trucks run or is something up? As a side note my truck does vibrate in just 2nd gear over 3k rpm. I've been told by the dealership that is normal operation though.
I’m familiar with the infamous shudder issue with the 8 speed transmissions but I haven’t seen an instance of a case like mine yet. My truck vibrates in 2nd gear when over 3k RPM. Every other gear is fine. Shifting is smooth. No deceleration shudder. Any ideas what could be causing the problem? I took the truck into the dealership. They acknowledged there’s a shake but say it’s normal.
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