Firstly, been lurking for a while and wanted to say thanks to the MUD community for all the shared knowledge. Definitely wouldn't have my cruiser in its current state with y'all.
For background I have '04 LX and bought it completely stock. Since then suspension mods include - AHC delete, OME 2.5 lift, diff drop, sway bar extension links front/back, new front wheel bearings, new cv's (not OEM), new rotors (not OEM), and upgraded my tries to 275/70r18 Duratrac's. At the point of these mods, never had any issue or wobble of any kind.
Recently, I upgraded to 315/75r16's KM3's and with it some new SPC UCA's and wheels. Got everything buttoned up as best as I could and went in for an alignment at an off road suspension shop.
It was an alignment from hell as I asked the sales guy explicitly if they had any experience with these specific UCA's and the kid more or less blew me off and said 'we'll manage it just fine'. Not confident in his response I told him I'd be staying there until it was done in case they needed a consult. After like 4 plus hours I realized they didn't know what was going on and I went in and asked if they have been rotating the star pate to achieve the desired +4 deg caster. They had no idea what I was talking about despite me providing the instructions *sigh*, and anyways from there we got cracking on everything after setting UCA's to position A (only way we could get close to +4 deg). The supervisor who eventually took over from his tech then worked on my alignment and got everything just about where we wanted it.
I headed home, and immediately after hitting about 40 mph I noticed the wobble. Took it back in the next day and our alignment numbers were all out of whack and the supervisor had a lot of trouble getting caster back in line and at this point we all wanted to be done with this alignment - mostly satisfied with the numbers you see below I headed home with the wobble still there. Next day, I had a feeling that maybe the tire balance was out of whack as I did notice recently that one of the weights looked to be coming off my new wheels (from what I hear can be common at times), and took the truck back to get the tires balanced. Tires rebalanced now and wobble is still there - again right at about 40 mph. No wobble under 40 and I'd say no wobble at about 50 mph.
Sorry for the long post but just wanted to help rule out any of the usual suspects. At this point the only thing I can point my figure to is maybe we need to hit the toe-in to -0.1? I know 0 toe can be problematic for some vehicles but wasn't sure if that's also the same case for our trucks? Last data point is that the guys at Costco where I got the balance done said the wobble is sometimes a symptom of the KM3's (not sure about that logic but if anyone can validate please share). They said they jacked it up and spun the wheels and the wobble was still there and there wasn't anything else they could do and that they checked for anything being loose and said it was all good. If that's the case then maybe the toe-in doesn't matter? Anyways getting out of my element here and thanks in advance for any advice.
For background I have '04 LX and bought it completely stock. Since then suspension mods include - AHC delete, OME 2.5 lift, diff drop, sway bar extension links front/back, new front wheel bearings, new cv's (not OEM), new rotors (not OEM), and upgraded my tries to 275/70r18 Duratrac's. At the point of these mods, never had any issue or wobble of any kind.
Recently, I upgraded to 315/75r16's KM3's and with it some new SPC UCA's and wheels. Got everything buttoned up as best as I could and went in for an alignment at an off road suspension shop.
It was an alignment from hell as I asked the sales guy explicitly if they had any experience with these specific UCA's and the kid more or less blew me off and said 'we'll manage it just fine'. Not confident in his response I told him I'd be staying there until it was done in case they needed a consult. After like 4 plus hours I realized they didn't know what was going on and I went in and asked if they have been rotating the star pate to achieve the desired +4 deg caster. They had no idea what I was talking about despite me providing the instructions *sigh*, and anyways from there we got cracking on everything after setting UCA's to position A (only way we could get close to +4 deg). The supervisor who eventually took over from his tech then worked on my alignment and got everything just about where we wanted it.
I headed home, and immediately after hitting about 40 mph I noticed the wobble. Took it back in the next day and our alignment numbers were all out of whack and the supervisor had a lot of trouble getting caster back in line and at this point we all wanted to be done with this alignment - mostly satisfied with the numbers you see below I headed home with the wobble still there. Next day, I had a feeling that maybe the tire balance was out of whack as I did notice recently that one of the weights looked to be coming off my new wheels (from what I hear can be common at times), and took the truck back to get the tires balanced. Tires rebalanced now and wobble is still there - again right at about 40 mph. No wobble under 40 and I'd say no wobble at about 50 mph.
Sorry for the long post but just wanted to help rule out any of the usual suspects. At this point the only thing I can point my figure to is maybe we need to hit the toe-in to -0.1? I know 0 toe can be problematic for some vehicles but wasn't sure if that's also the same case for our trucks? Last data point is that the guys at Costco where I got the balance done said the wobble is sometimes a symptom of the KM3's (not sure about that logic but if anyone can validate please share). They said they jacked it up and spun the wheels and the wobble was still there and there wasn't anything else they could do and that they checked for anything being loose and said it was all good. If that's the case then maybe the toe-in doesn't matter? Anyways getting out of my element here and thanks in advance for any advice.
