transmission or electronics?

[towelsnapper17]

i have a 97 silverado with the 4l80e trans. when i get out on the road and drive for a little bit every once in a while the truck will start to stutter or shake. the only way it stops is if i let off the gas or really get on it. the next issue i have is that after almost 8 miles on the dot if i come to a stop sign and take off again it starts to "drop" hard into all the gears. it drops the hardest from 1st to 2nd then gets a little better in each of the next gears. the weird thing is that if i stop then and shut the truck off even if its for 30 seconds it will be fine again for about another 8 miles like somthing gets reset. any help on this would be greatly appreciated

[Jimmiee]

What's happening is your transmission goes into failsafe and the PCM raises the line pressure which makes it shift hard. You may also have a misfire which causes the shaking. Go to a shop and get it scanned for codes. Autozone will do it for free. Post the codes here and we can help you fix it.