"Floaty" steering on interstate - Tires or Alignment?

Fox TALAS and other adjustable suspension forks? Not changing wheelbase but will change positioning and angles by flipping a lever.


When I replaced my UCA's, I went from caster at about 2.1 to 3.7, made a very nice difference on the highway.

Yeah mine is adjustable but not as drastic as head tube angle lol. I like a slacker versus twitchy. Twitchy is for racing and youngsters...
 
This weekend was the first time I had the new T4R on the interstate(and out of Oregon). Just put on a Toytec 2.5 Ultimate Lift and BFG 285/65-18's and thought they did pretty well. Passengers asked me why I was all over the road and I asked what they were talking about. I didn't really notice it, but after they asked, and depending on how worn the ruts/surface was, that I could just barely touch the steering wheel(like 1 degree or so) and it had a very tight/quick response. Wasn't too difficult to keep in the lane, but if I hit puddles or ruts at 70-75mph, I did have to correct.

Still happy with the alignment and tires. Although I need to replace the UCA's to get more caster. I think they could only get to 2.3 or something like that.
 
Good link, very clear and basic explanation.

I had the dealer do a full alignment and ended up at 3deg caster. It was about 2deg prior. The toe-in was out of whack as well. Possibly placebo effect, but the wandering effect seems to be significantly lessened now.
based on your initial post, it sounds like it was toed out. that will cause what you are describing.
 
I don't have the spec sheet in front of me for the before/after, but the before was mostly within the parameters of acceptable. I asked them to get it dead on all the reference ticks and after that it's driven perfectly since.
 
After much research and driving the different models we finally decided that we wanted a new SR5 Premium because we do a lot of HWY driving. In our testing the SR5 model seemed the most comfortable on the HWY. So after deciding on the SR5 Premium it finally came down to which dealer would give us the best price That wound up being a dealer about an hour away from us who had a demo with 1500 miles on her that he was motivated to move.

So we did the perfunctory 5 mile test ride last evening and everything seemed fine and we finalized the deal. On our 60 mile hwy ride back home I was like,"Oh Chit" this thing is twitchy as can be - much more than I remember on my other longer test rides in other SR5's. I found it annoying as heck to keep between the white lines. Having never owned a 4runner a bit of doubt began to creep in my mind about the user-friendly hwy driveibility of these 4runners, but then I figured with the great reputation of the 4Runners it had to be correctable with tires or alignment.

After finding this thread I feel a bit relieved that others have faced and rectified this issue as well. Fingers crossed that our new issue is alignment.

Thoughts?

I'll let you know how it turns out.
 
I would call myself a near expert on this stuff at this point. I bought my 2014 TE in October and for tires I have run the original OEM Dunops, BFG KO2s (LR:C), Cooper ATPs (P), Cooper AT3s (P), and a different set of KO2s (LR:C).

I was convinced the poor driving characteristics were due to the tires, but after getting an alignment it turns out the twitchy/floaty feeling was mainly a symptom of poor alignment.

I wouldn't mind mine to be a little bit tighter, which means having the caster closer to maxed out, but right now I'm in the dead middle of acceptable caster variation according to the dealer.

I would recommend having your dealer do an alignment and ask that they take the caster further than mid-spec, which should be close to 3 degrees or more.
 
I just went and found my alignment spec sheet from the dealer. I am happy with my setup as is, but would expect it would tighten up more as you approach 4 degrees.

If I remember correctly mine was like 2.3deg or something prior to getting adjusted.


IMG_20161220_104017183_HDR_zpss0yjdt70.jpg~original
 
I would call myself a near expert on this stuff at this point. I bought my 2014 TE in October and for tires I have run the original OEM Dunops, BFG KO2s (LR:C), Cooper ATPs (P), Cooper AT3s (P), and a different set of KO2s (LR:C).

I was convinced the poor driving characteristics were due to the tires, but after getting an alignment it turns out the twitchy/floaty feeling was mainly a symptom of poor alignment.

I wouldn't mind mine to be a little bit tighter, which means having the caster closer to maxed out, but right now I'm in the dead middle of acceptable caster variation according to the dealer.

I would recommend having your dealer do an alignment and ask that they take the caster further than mid-spec, which should be close to 3 degrees or more.

Thanks, I have a service appt set for Thursday.
 

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