Fitting 33" tires with NO CMC and maintaining OEM Specs.

2000prerunner23 · Oct 3, 2021

WormSquirts said: ↑

For sure you're right, with heavy wheeling, it all needs to be replaced anyway!

I own a shop that exclusively works on off-road Toyotas, so I see a lot, and have installed/run a lot of setups. There's absolutely nothing wrong with your setup at all. I do find that the truck drives better with 3°+ of caster, but it is all a bit personal preference. I try to aim for 3.5°.

The OEM rubber bushings definitely don't like being run at an angle. The stock adjustments are there to correct frame variations, and are also accounting for camber and caster (with stock uca), but aren't meant to be maxed out. When the bushing is at an angle, it strains the rubber, and they end up wearing out and tearing quicker. I've personally gone through 3 sets of LCA bushings before changing everything to uniballs which don't care what angle they are at. I've seen the same thing with several people I know who drive off road a lot, and end up going through LCA bushings basically as often as inner tie rods, which is ever year or so. I just installed a new toyota rack with two new Toyota inner tie rods in December and have already got a bunch of slop in one of them.

But anyway, that's just what I've seen for people that spend a lot of time driving back roads and have their cams cranked to try and fit bigger tires (usually 35s) without tubbing and relocating the cab mount. Maybe the bushings would go just as fast with a more neutral alignment, but I haven't seen people with 33's and neutral alignments going through LCA bushings near as often. There are a lot of variables at play.
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Oh looks like running uniball pivots all round isn’t so dumb after all TW …

toku58 · Oct 3, 2021

JoeCOVA said: ↑

No one is saying that there isn’t some movement but it’s negligible and not remotely on the same level of the LCA adjustments which is what you argued.

I can change my UCA settings from minimum to maximum without affecting my cab mount clearance, I know this because I've ran every setting. However, when I have too much positive caster (about +4), I rub the firewall on compression so I reduce the caster to clear the firwall and am sitting at around (+1.75).
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See now it seems like we're on the same page. The SPC allows you to take away Caster while still allowing you to correct the Camber with the UCA's. This allows the LCA's to be utilized better to get everything into specs.

aleriance · Oct 6, 2021

toku58[OP] said: ↑

Glad it works out for you guys! I guess I'm not as Macho? LMAO!! No sliders for you guys? Just charge to prove your macheesemo!
I prefer to do it with as little damage as possible. The less I need to cut or alter the better.
As I get older I understand it's not always about brute force.
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Outstanding.

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Fitting 33" tires with NO CMC and maintaining OEM Specs.

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Fitting 33" tires with NO CMC and maintaining OEM Specs.

#41 2000prerunner23 Well-Known Member

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2000prerunner23 Well-Known Member

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