Trac Bar with Full Suspension Replacement

[FarFire70]

I'm replacing my entire suspension after the Jeep frame has been up on jack stands and the axles removed so there is no 'reference points' as far as axle placement.

I'm putting in a Currie/Savvy full JJ & all adjustable arm kit.

I have all arms in and the springs and I'm working to try to dial in the pinion angle for each axle (and confirm they are square to the Jeep).

My reading of the guidance was to center the axle based off full stuff. This makes sense front to back but then the side-to-side is still way off. I've also read to get the arms length set (pinion & squareness) and then put in the trac bar.

I'm at a loss on where to go as installing the trac bar when the axles were at full stuff has them 1-2" off side-to-side at ride height.

Before I try to get the pinion & squareness down, am I best to correct the trac bar to space the tires/axles equally? Or do I remove the TB entirely from the install now and just get the pinion & squareness dialed in?

How can you confirm the squareness if the axle/frame references will change after you set the arm length to get the axle centered?

 

[Blackjack]

I'm replacing my entire suspension after the Jeep frame has been up on jack stands and the axles removed so there is no 'reference points' as far as axle placement.

I'm putting in a Currie/Savvy full JJ & all adjustable arm kit.

I have all arms in and the springs and I'm working to try to dial in the pinion angle for each axle (and confirm they are square to the Jeep).

My reading of the guidance was to center the axle based off full stuff. This makes sense front to back but then the side-to-side is still way off. I've also read to get the arms length set (pinion & squareness) and then put in the trac bar.

I'm at a loss on where to go as installing the trac bar when the axles were at full stuff has them 1-2" off side-to-side at ride height.

Before I try to get the pinion & squareness down, am I best to correct the trac bar to space the tires/axles equally? Or do I remove the TB entirely from the install now and just get the pinion & squareness dialed in?

How can you confirm the squareness if the axle/frame references will change after you set the arm length to get the axle centered?

Axle centering needs to be at ride height. Now whether you want the axle perfectly centered is dependent on how much travel you are trying to get out of the suspension and if you run into interference at any point during that travel. You may find that after doing a travel check it may be beneficial to run the front track bar a touch short.

 

[jjvw]

...


My reading of the guidance was to center the axle based off full stuff. ...

No.

Put the track bars in. Center the axles and make them parallel and square at ride height.

Put a long bolt in the middle holes of the center skid to use as a reference point. A framing square on the ground held against the axle tubes also helps.

Then remove the springs and fully cycle the axles with a floor jack to confirm interferences. This includes full articulation with tires on and turning the steering lock to lock.