Home brew alignment theory

[Dwilly]

those numbers look really good. Do you happen to know where the adjustment nut was set before the alignment? Mine is one notch forward of straight down (on both sides)

I do not know where they were.

 

[Squatch]

I do not know where they were.

I’ll I know is, when I get home I am cranking those suckers a little further back. Mine is still a little twitchy.

 

[Brewbud]

Doing that alignment straightens the springs out real nice and gives a touch more clearance at the rear of the wheel well for the 37s. I barely trimmed anything at all.

Have you had a chance to check the tire fit while turning with some flex?

 

[H3LZSN1P3R]

Before the alignment from a local shop

My only concern is they used the specs from a 1/2 ton as you can see in the picture... caster for ifs is different from solid axle

 

[Rockcrawlindude]

0° toe and 4° caster is bout perfect on these though according to thuren specs

 

[H3LZSN1P3R]

0° toe and 4° caster is bout perfect on these though according to thuren specs

Fair enough

 

[Dwilly]

My only concern is they used the specs from a 1/2 ton as you can see in the picture... caster for ifs is different from solid axle

They did what i told them to do as per Thuren specs. Not sure why it says 1500. Makes no difference either way.

 

[Dwilly]

Have you had a chance to check the tire fit while turning with some flex?

Nothing touches. I went over a significant speed bump while turning and all was good.

 

[Trooper]

Drivers side.

This is exactly where mine are now and drive is perfect. I have 3"F/1"R level.
What was strange to me is that two local alignment places would not follow the Thuren spec, ignored my request, (even after showing them, I believe they don't understand so don't want liability) I drove an hour to another recommended place and that is all they would do, Thuren spec. I am very happy with the set up now

 

[Squatch]

Passenger side. Truck tracks straight and beautiful. Nice, light steering for a diesel with 37s.

I matched your settings this morning for those caster adjustments and it made a hell of a difference on the highway with wandering and greatly improved the trucks ability to automatically recenter the steering when you let the steering wheel go after turning. Thanks for the pics. I’ll also add, those suckers were damn hard to brake loose on my passenger side...holy s.... I’m thinking they had those quite a bit tighter than the 150 ft.lb spec.

Edit: torque spec is actually 225 ft/lb.

 

[Rockcrawlindude]

I matched your settings this morning for those caster adjustments and it made a hell of a difference on the highway with wandering and greatly improved the trucks ability to automatically recenter the steering when you let the steering wheel go after turning. Thanks for the pics. I’ll also add, those suckers were damn hard to brake loose on my passenger side...holy s.... I’m thinking they had those quite a bit tighter than the 150 ft.lb spec.

@LateToTheParty said they were 215lb ft when he broke his loose. think I read the spec was 230lb/ft. Double check the spec before you send it at 150lb/ft

 

[Squatch]

@LateToTheParty said they were 215lb ft when he broke his loose. think I read the spec was 230lb/ft. Double check the spec before you send it at 150lb/ft

Haha, 225 lb/ft, back out to the garage...thanks man!

 

[Dwilly]

Hope you guys are loosening the upper radius arm bolts b4 doing caster adjustments! Glad to hear all has worked out.

 

[Squatch]

Hope you guys are loosening the upper radius arm bolts b4 doing caster adjustments! Glad to hear all has worked out.

That I did get right

 

[Rockcrawlindude]

That I did get right

What’s the torque spec on that bolt?

 

[Squatch]

What’s the torque spec on that bolt?

I found 225 ft/lb from the Thuren spec sheet for both radius arm to axle bolts.

 

[Rockcrawlindude]

What about the frame end?

 

[Squatch]

 

[Rockcrawlindude]

View attachment 11857

Thanks! I didn’t see that page I was looking at a different one.

 

[Rockcrawlindude]

Hey @Squatch how much lift are you running?

Your truck still riding good set at the same caster settings as Dwilly posted?