I just replaced the plastic fork in my transfer case and everything goes well, the car move smooth like months before, also change my sparks and cleaned up the throttle body.
the plastic hose close to the fifth cylinder to the plastic chamber was destroyed and will replaced soon,
the problem I have no is the truck stars to shake around 30-35 mph,
what can it be?

 

The vacuum hose to the port at the rear of the engine is easily replaced with a 1/2" rubber emission hose. You likely have a vacuum leak.

Any CEL or codes?

 

re tighten your wheels nuts.