Question regarding transmission behavior

[iCryWheniGoPoop]

I have a the 4.3 would my trans be the same? I was going to bring it in because it seems like from about 30mph down to 20mph there is a slight vibration almost like when your driving a manual trans and your in to high of a gear but not as pronounced as it would be in a manual trans. this is the second truck i have bought in a year and i had small issues with the other one too so i am loosing faith but if its designed to be that way it makes me feel better.

 

Now I have not had the pleasure of driving a 4.3 for any period of time that would make me qualified to answer this but I have a couple questions before I answer with my 5.3 experiences.... Is your vehicle stock? If not, what modifications do you have?

If your vehicle is stock then I wouldn't' think there would be any vibration but the 4.3 may be different. I get nothing more than a slight drag from the engine braking and a couple earlier downshifts than what I would normally expect.

If you have any modifications like a lift/drop or even possibly exhaust then what you are feeling could be caused or amplified by the modifications.

[boxerbull]

No modifications completly stock regular cab shortbox work truck 4x4 with the 4.3 and just under 1000 miles. Like i said it is a faint vibration but its there I can feel it in the steering wheel and slightly in the seat when slowing down from 30 to 20 its at its worst at 25mph. I also have a 99 camry that i drive the exact same route as the truck to work and there is no vibration so its definetly the truck. My 2013 that i sold had an annoying buzz in the radio the dealer told me that they all do that I am kind of getting fed up with Chevy.