i just lowered my truck 2/4 2 in drop spindles and 4 inch angle blocks aslo change motor mountbecause itwas bad.At 40 mph and over it starts but when driving at 30 nothing happens. The truck was aligned and he told me the shock on passenger side was wore. The vibe is coming from the front.

 

Have you had the balance on your tires checked?

 

they were balance and they were good

 

I took my truucck in the have the front end rebuilt. The mechanic asked why I needed it rebuilt and I told him a had a real bad vibration in the front. We went for a drive and he said immediately it's the shocks. He replaced the shocks and gone went the shake.

 

The truck never did it before it was lowered