Alignment question

Just curious on thoughts. I’ve been having some what I think are alignment issues with my 21 SR5. 3” lift, 285/70/17. Do you think it’s best to put alignment by to spec and do a CMC mod or just move caster highest it will go forward? When I got my new JBA UCA’s there’s an alignment sheet in the book and my last alignment guy said he set to those specs but still seems to be doing the same thing it has been since the lift. Any thoughts are much appreciated. I’ve tried uploading video but won’t upload.

 

What's it doing and what are your alignment numbers?

 

The steering wheel is acting like bump steer. I tried uploading a video but it wouldn’t upload.

 

Have to upload to YouTube then attach link to it here

 

That alignment looks about as good as you can hope to get.

High caster definitely feels a lot different in the steering wheel, I would drive it for a bit and see if you get used to it.

 

https://youtube.com/shorts/CzsmwFKZ2xE?feature=share

 

Hopefully that worked. That is on a small gravel driveway area. Notice the MPH.

 

I personally did not like that high of caster on my own truck. I know exactly what you are talking about. Lowered mine down to around 3.3

 

Just got mine set to +3 caster , 0 camber and 0 toe. Feels different. Going on a road trip tomorrow. Will see how it does.

 

Mac- you think it’s because there’s so much caster?

tacodog- what tire you running? Did you have to do the CMC mod?

 

Mine felt twitchy at 4.5. After hitting a bump I had slight osalation of the steering wheel. Plus the steering felt heavy to turn

 

What tire you running? I don’t think my steering feels to heavy just pretty much every bump moves the wheel.

 

285 70 17

 

Same size I’m running. So your caster is 3.3 did you do CMC so you don’t rub? How’s it feel on smaller bumps once you lowered caster?

 

Wow...
Are you going over bumps in the video?
What's the offset on your wheels?

 

No cmc. I have Spc uppers. Lower eccentrics are maxed to push wheel all the way forward. I have slight rub on the plastic splash shield. Feels better on smaller bumps now.

 

They look like methods in his avatar

 

Splitbolt- Yes small rocks and small holes in the dirt drive, method 301 17x9 -12

Mac- I do have JBA uppers

 

I’ve been fighting this for a couple months trying to wrap my head around it.

 

I suspected a negative number...
It creates more leverage when you move the offset that way...

Are those your numbers or are they from the JBA instructions? Betting you have toe around 0; should be at least +0.07 for that amount of added positive scrub.