I have searched this topic thoroughly and think I have a sound understanding of the issues contributing to my problem and the diagnosis.
However, even with castor and toe numbers within spec on alignments, I am getting rapid uneven tire wear that is indicative of bad toe numbers.
08 Access cab 4wd
OME 886s with factory UCAs
ARB+ Smittybilt XRC8\synthetic line
Factory steel wheels, 255/85/16s
Ever since installing the 886s and ARB, I have been observing persistant wear issues with alternating blocks on the inside edge of the passenger front tire. The driver front is fine and wears evenly. Also constantly present is the loud "thrumming" noise I have heard before on vehicles with bad front suspensions. Every bit of research I have found and tech I have spoken to said this is a symptom of bad toe alignment on that side.
However, each time the vehicle is aligned, it meets the factory spec range on everything but caster. I has been to four separate shops and had all wheels/tires rebalanced in the last 3,000 miles in an effort to properly diagnose the problem.
This is the printout from my last alignment shop session:
As you can see, the toe on the side wearing rapidly was in spec before alignment. After having this work done, the loud rumbling from the front end is still there. This has been the story each time I have had the alignment run. I am going to rotate again and observe wear, but based on past results, I doubt the pattern is going to change.
Any insight as to why the the passenger front is still feathering rapidly even with in spec toe/camber?
On caster: I know the numbers are terrible, but I find the truck very drivable and stable at freeway speeds. This might be due to the 255s, which track like semi trailer tires.
I see two possible courses of action moving forward if this latest alignment definitely has not fixed my problem:
1- Aftermarket UCAs probably either LR or Allpro. I should do this anyway, as my alignment adjustments are pegged just to get the specs I have.
2- Swap 885s in instead of 886s, and retain factory parts.
The 886s are ludicrously stiff. Even with the weight of the ARB + winch, they have not settled much at all in the last 6k miles.
Thank you in advance