well i have an 86 Blazer 4x4 with the 2.8L V6. i noticed the other day that when i have it in four wheel drive and i get up to about 30 mph i get this vibration. it seeems like its comming from the front end somewhere. so i crawl up underneath to check the u joint to see if that could be a possible candidate. when i went underneath the truck and the boot for the half shaft was ripped. i was wanting to know if that could be it or if i should still change out the u joints?

 

well theres yo problem u hav a 2.8 get a 4.3 next time jk. i would change it just in case it sounds like sometin may hav jumped up and hit it. cause my blazer whn in 4 wheel drive rides smoother especially on the freewyay.

 

yeah having the 2.8 wont cause the front end to shake like it is. it was the U JOINT not the MOTOR that was causing the vibrations.

 

i said i was just kidding calm down geez