Shake when shutting off the key.

if it's at low idle it will shake like crazy back and forth, flywheel and crank and everything still connected and spinning, it rocks back and forth with the momentum of everything. if it's at high idle it feels like it disconnects from flywheel and crank and uses the engine brake to grab the cylinders as it shuts off, you hear little puffs of air and no rocking or shaking. on mine low idle vs high idle is only like 200 rpm difference, u hold cruiser accel button to raise it. if it's at low idle when you key off its pretty rough, if it's at high idle when you key off the engine brake grabs it like a marshmallow fist instant off and quick

 

Trucks just do that sometimes. Some more than others.

 

Do the new trucks have the anti shudder valve ?
It’s a flap that closes and cuts off the air so the engine doesn’t shake as much when it stops .

 

if it shakes more than 3x....your playing with it

 

my DD13 low idle is 600, high idle is like 750...if u key off at low idle it bangs around, if u key off at high idle it farts to a instant stop without any shakes, sounds just like an engine brake

 

All of my old trucks would stop the engine so hard it would shake the truck and squeak the fan belts .

 

lol