Help diagnosing root cause
Looking for a bit of clarification on what the root causes of DW are, versus what would be contributing factors leading to more often occurrences.
If I read the orig post correctly the are basically two possible root causes; either the TB or the control arms. Everything else like worn/damaged ball joints, tie rod ends, drag link etc just add to the liklihood DW will occur. Does this sound right?
I'm trying to solve DW on a stock '07 JKU. We've had the JK for about a year, and I suspect that the underlying cause has been present but being hidden by the SS until recently, when DW reared it's ugly head and scared the hell out of da wife. I have now also experienced it...and it's def full blown DW.
I've been through the checklist items I could do at home, and been to two independent mechanics who 'claimed' to have knowledge of DW. I didn't give the checklist to either mechanic, just so I could gauge what they knew by what they looked at.
At this point, here is what I can say with certainty is wrong. Ball joints, drag link, tie rod ends all toast. SS is shot as well. Given what it has been through and having 90k on the clock, no surprise there. I don't want to go ahead and replace these unless I know what the true cause is. Otherwise they just get damaged again down the road.
This is where it gets more confusing. My manual inspection of TB didn't indicate anything wrong. Truth be told I'm not sure if I missed anything due to lack of exp. I didn't feel anything odd, and the welds looked ok. I tried to take the bolts out, but I couldn't break em loose at home which is why I went the mechanic route. Both mechs claim TB is OK. One took the bolts out and said no ovaling. The other just did a manual check while still bolted up. One mech did check the majority of the checklist items and confirmed the items I listed above are bad. He didn't look at the control arms, and when I asked about them he tried to tell me that it doesn't have them. The other mech pretty much just checked then TB and then said I should replace shocks, SS and go back to stock size tires. He did find play in the ball joints, but said nothing to be concerned about. No exactly confidence inspiring...
At this point I'm thinking, OK, I'll have the obviously bad items replaced and at the same time put on a Teraflex HD TB with the larger bolts along with new control arm bushings, get everything toqued to spec, and hope that covers all the possible weak spots.