85 720 lowered issues need help asap

[720s]

i recently lowered my 720 4" & i recently noticed when im driving at a good speed like 40-60 my rear end sways and my steering wheel is a bit loose

[wayno]

i recently lowered my 720 4" & i recently noticed when im driving at a good speed like 40-60 my rear end sways and my steering wheel is a bit loose

 

How exactly did you lower the rear, remove leafs?

[datzenmike]

Any lowering of the front throws the toe alignment out. The more you raise or lower from normal the more the front wheels turn inward toward each other. Line one of your front wheels up with the rear wheel behind it. Have someone help you. Sight down the sidewall to the rear one, and once the front and rear are in a straight line, walk out in front and look down the other side. I'm betting the other wheel does not line up and is pointed markedly inwards.

 

wayno is also spot on for the rear springs. Removing leaves or heating them to make them sag is dangerous and plain wrong.

[720s]

I added 4" drop blocks & loosened the torsion bar bolt

[Draker]

Get it aligned.. ?

[datzenmike]

I added 4" drop blocks & loosened the torsion bar bolt

 

That will work and better than some. You may find the adjustment bolt is at the end of the adjustment. You can remove the torsion bar and turn it a spline or two and put back in. Look up 'indexing your torsion bar' 

 

Get a torpedo level and hold vertically against the front rims. Less that vertical is added camber and it will wear the outer or inner edges of your tires. You might want to raise back up slightly or if there are shims left they can be removed to move the top outward.

 

The other concern is more apparent. Toe in. Both tires are turned inward and fighting each other going down the road. This also wears the tire tread off quicker. Truck tends to wander constantly and very dangerous in the rain.