I'm slowly getting my build done. The tons are finally installed and I am finalizing the control arm lengths.
On the front, I went with MetalCloak's suggestion of [email protected]
/16" and [email protected]
/4". The pinion angle looks good on the front but I have not been on an alignment rack yet to confirm the caster. The front is probably fine.
The rear is where I am spending my time at the moment because the pinion is to high and does not form a straight line with the drive shaft. I started by using the Synergy specs on the rear control arms because they are slightly shorter than what MetalCloak publishes and was trying to avoid pushing the axle back to far .
The shortest that I can get the MetalCloak UCAs to is 17-5/8" which is still slightly longer than stock (17-7/16"). I'll have to lengthen the LCA now to compensate. Stock, the rear LCA is 19-3/4" and I set it to Synergy's spec at 20-1/4". Now I'll try the MetalCloak spec of 20-7/16" for the rear LCA but I suspect that won't be enough.
I read through another thread here on JKO that suggests you want the pinion angle a degree or two smaller than the driveshaft angle because under power, it will raise up slightly.
The pinion was way to high with the rear control arms set at:
Then I shortened the UCA as much as I could and the pinion is still a tad high.
I'm going to grab a beer and set it up as follows and see where it lands me but I suspect I will have to kick out the LCAs a little more. There's a certain degree of trial and error here.
The Fusion4x4 housings have the brackets welded on already and and compensate for some pinion angle change. I told them I had a 4" lift and then promptly swapped out my coils to 3" so I might be working against myself slightly with that change.