Need some explanations please.

[Ben Hinz]

So I’m thinking of running some Fox Shocks that are 0”-3” lift. But in order to run this set up, you need new UCA (Upper Control Arms). Can some please explain to me why. I know it has to do with achieving better angles and geometry for the suspension and what not. I just can’t wrap my head around it. Thanks in advance.

Also would having new, extended UCA help with bump steer?

 

[Ilikemtb999]

You have bump steer because of your wheel offset, plain and simple. You’ve got way too much positive scrub radius which does silly things to a vehicle. Notice any poor braking too?

 

[Ben Hinz]

You have bump steer because of your wheel offset, plain and simple. You’ve got way too much positive scrub radius which does silly things to a vehicle. Notice any poor braking too?

I’ve had zero braking issues. If anything I feel it’s gotten better since I now have new tires with more traction, unlike my old used ones.


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[dnt1010]

Do not want to thread hijack but I have what i think is a problem that driectly relates here. i have a 2009 Tahoe with a 3.5" body lift that I recently bought. My drivers side Upper Ball Joint is squalling like a wild boar caught in a trap, when I turn the steering wheel. Per the seller both sides UCA were replaced within the last year. I think the 3.5" lift is somehow stressing the UCA's and I need to know what type of UCA to go back with so I am not having to change them out once a year? Sorry if this has been answered before but I have bounced around the search feature for a while here and I cannot pinpoint it.... Any help would be greatly appreciated. I have never had a lifted vehicle before so I am just not familiar at all.

 

[arctictwist]

Do not want to thread hijack but I have what i think is a problem that driectly relates here. i have a 2009 Tahoe with a 3.5" body lift that I recently bought. My drivers side Upper Ball Joint is squalling like a wild boar caught in a trap, when I turn the steering wheel. Per the seller both sides UCA were replaced within the last year. I think the 3.5" lift is somehow stressing the UCA's and I need to know what type of UCA to go back with so I am not having to change them out once a year? Sorry if this has been answered before but I have bounced around the search feature for a while here and I cannot pinpoint it.... Any help would be greatly appreciated. I have never had a lifted vehicle before so I am just not familiar at all.

If you have a BODY lift, its not affecting your suspension.