1986 bronco shuddering

[Bronc76]

He said... "it shakes while in park "
Would the torque converter cause that?

the convertor might cause the vibration if it is out of balance (I maybe way off).

fsas- does it vibrate if it is revved in neutral?

 

[famousguy_fsas]

not at a high rev cause it only does it when not to much stress on the truck. like low revs and cruising speed. anytime i jump on the gas it goes away. so i know i said i dont think it was the engine before. but more and more driving i guess its possible. so this one im just totally lost. so who votes i just take it in to a shop and get it diagnosed. would be the first time i have ever broughten any of my 15 cars i have owned into a shop. i hate shops

 

[famousguy_fsas]

also not at all in neutral cause its not much stress on the truck. but when stopped in drive and on the break and i give it a lil bit of gas without going anywhere it will start to shake

 

[Maddog]

Have you ever used a Jake Brake?? Does it feel like that?

 

[Yardape]

recheck your firing order. Make sure you used the 302 firing order (15426378) and not the 302ho/351w firing order (13726548).