SPC Upper Control Arms

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jonharis

jonharis

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I want to see these (or similar) go into production! I've been running Just differential's UCAs for about 2 years now and they have served me well but in the dusty conditions I typically drive in I think an OEM ball joint would better suit my needs as a more maintenance free option. Slee, What say you? I understand that OEM Upper ball joint's are not replaceable and can't be sourced and the entire assembly must be purchased. Is there a viable upper ball alternative that would have the correct specs that would work in this application?

http://www.sleeoffroad.com/products/suspension_pieces_ifs_arms.htm
 
Last edited:
Ball joint type arms

How abut something like this:

bj uca sample.webp
 
I'm just weighing the benefits between the two.

Uni-Ball Pros: Strength, Increased Droop/Caster/Camber, User Replaceable
Uni-Ball Cons: Prone to Squeaks, Must Lubricate, Cant get the replacement at Napa.

Ball Joint Pros: Sealed, zero maintenance, Longer replacement cycle. User replacement with widespread parts availability. Potential for increased travel/caster/camber over OEM.
Ball Joint Cons: Slightly less strong, maybe (unknown) less droop and alignment adjustment.

Dunno.
 
jonharis said:
I want to see these (or similar) go into production! I've been running Just differential's UCAs for about 2 years now and they have served me well but in the dusty conditions I typically drive in I think an OEM ball joint would better suit my needs as a more maintenance free option. Slee, What say you? I understand that OEM Upper ball joint's are not replaceable and can't be sourced and the entire assembly must be purchased. Is there a viable upper ball alternative that would have the correct specs that would work in this application?

http://www.sleeoffroad.com/products/suspension_pieces_ifs_arms.htm
Click to expand...

the pricing on these is great too...hopefully the 100 series version will be the same.
 
I had the SPCs on my FJ and they were great, totally maintenance free and no squeaks. I called them a couple of times and asked about them for the 100 and they said that they had not had enough interest. Give em a call and but the crap out of em till they build em!
 
What about an offset balljoint? Can we get that too? To me, in theory, it sounds like a good idea to get most of the adjustment at the balljoint and then fine tune at the inner pivot points. With the OE design, it just seems like it binds when adjusted too far.

Can an offset ball joints hold their set position over time and abuse?

SPC_Part_67320.jpg
 
^ packaging gets a little trickier/impossible to retain full/extended droop clearance between the off-set balljoint/arm and a 2.5 can shock. A clean sheet design can accommodate whatever offset, laterally and/or fore/aft as necessary for any ball joint...

like to know the articulation range, in degrees, on any of the mentioned ball joints.
 
Good point. How about a standard ball joint but the arm slotted fore to aft for caster adjustment. Should not need too much extra room. Ball joint would be responsible for caster and inner pivots for camber... less bind?

But, as you said, building it in would be best. And seems like everyone has a 2-2.5" lift and so it shouldn't be too hard.
 
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