Alignment on lowered OBS

[618 Syndicate]

How wide are your front tires? Is this a result of tramlining rather than an alignment issue?

 

[04SVT]

Too much caster is not going to cause that. Check your pitman and idler arms. Have a buddy steer the front end back and forth while you examine those and all the other connections like tie rod ends.

I have those two new parts, in case it needs them. I had a previous shop check and they said that they were both tight, but I kind of agree... there's not much else that could be causing it. I should probably have the alignment shop install those, then re-align it.

 

[Erik the Awful]

If your pitman is tight, but delays turning when you turn the wheel, your steering box still has slop.

 

[04SVT]

How wide are your front tires? Is this a result of tramlining rather than an alignment issue?

I've got a staggered 8/10 set up with Torque Thrust wheels, 245/45-20 up front, 275/40-20 rear. It's not really doing it on ridges or the center line... more like all the time, just a slight but constant drift left, drift right.

 

[04SVT]

If your pitman is tight, but delays turning when you turn the wheel, your steering box still has slop.

The shop re-adjusted the steering box.

 

[04SVT]

Please post your alignment sheet.

Camber 0.0 and 0.0
Caster 5.1 and 5.9
Toe 0.13 and 0.12
Total toe 0 .25
Steer Ahead 0.00

 

[Erik the Awful]

The shop re-adjusted the steering box.

Trust, but verify.

 

[618 Syndicate]

I've got a staggered 8/10 set up with Torque Thrust wheels, 245/45-20 up front, 275/40-20 rear. It's not really doing it on ridges or the center line... more like all the time, just a slight but constant drift left, drift right.

Not really wide up front, so I wouldn't think that was a problem.
Does it behave like this consistently and constantly? No matter the road surface material and condition, speed, etc?

 

[Supercharged111]

Camber 0.0 and 0.0
Caster 5.1 and 5.9
Toe 0.13 and 0.12
Total toe 0 .25
Steer Ahead 0.00

That's more caster than I would have expected, but also a good bit of cross caster. We have .6 degrees of cross caster in the wife's Envoy and I was not happy leaving the alignment rack. Fortunately it doesn't pull one way of the other with that much, but I wouldn't be thrilled with that much cross caster. That said, yours pulls both ways. The alignment implies that it should pull to the left all the time, this was probably done to assist with road crown but I'm not a fan of it. If you do go back, and you like taking corners with enthusiasm in your lowered truck, I'd ask for some negative camber but you may have to give up some caster for it. As for the left and right drift, it's not in the alignment, and I didn't expect it to be.

 

[04SVT]

Not really wide up front, so I wouldn't think that was a problem.
Does it behave like this consistently and constantly? No matter the road surface material and condition, speed, etc?

Yep, very consistent, very slight, but then again, very noticeable...