Lower link mount location on axle

tactical328 · Post by **tactical328** » Thu Sep 20, 2018 7:18 am

Hey guys,

I've been thinking about this for awhile, why do trophy trucks/desert rigs run their lower links under the rear axle? Compared to KOH or Ultra4 cars that run their lower link mounts either flush with the bottom of the axle or parallel with the axle tube?
I'd like to run my lower link mounts higher up to prevent them from hanging up on stuff like the KoH cars. Is it a matter of keeping link separation without sacrificing up travel? Or is it something to do with getting the right antisquat values?

Thanks

Tchajagos · Post by **Tchajagos** » Thu Sep 20, 2018 12:43 pm

Shocks mounted off the axles or off the lower link?

Tchajagos · Post by **Tchajagos** » Thu Sep 20, 2018 12:50 pm

Looks like it’s for clearance so nothing can get hung up on rocks. It puts a lot more strain on the upper links though. But ultra 4 cars are generally smaller and lighter than trophy trucks.

tactical328 · Post by **tactical328** » Thu Sep 20, 2018 3:53 pm

Yeah my shocks will be mounted to the lower link, I do trail and crawling alot in my rzr - most of the ORV areas in WA are trails and such not alot of open desert so I still would like to keep the bottom smooth as possible in the Bronc. Probably wont be a problem...

cs_drums · Post by **cs_drums** » Thu Sep 20, 2018 6:53 pm

Just don't short course style link. Less work, high clearance and cheaper

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cs_drums · Post by **cs_drums** » Thu Sep 20, 2018 6:53 pm

Just do*

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BDKW1 · Post by **BDKW1** » Thu Sep 20, 2018 7:53 pm

It is purely for ground clearance. As noted it does put a lot more compression force on the upper links. It will also screw with your anti squat numbers.

If you mount the lowers at an angle to get the mounts on the axle as far as possible, they will be much less likely to hang up on rocks. It will also make for a more stable ride without resorting to a swaybar.

tactical328 · Post by **tactical328** » Fri Sep 21, 2018 10:40 am

I dont get what you're saying - mount the lowers to get the axles as far as possible? far as possible where?

Tchajagos · Post by **Tchajagos** » Fri Sep 21, 2018 1:17 pm

tactical328 wrote:I dont get what you're saying - mount the lowers to get the axles as far as possible? far as possible where?

Far out as possible. As close to the wheel as you can without rubbing the tires. The tires protect the lower link tabs.

tactical328 · Post by **tactical328** » Fri Sep 21, 2018 8:02 pm

Ah yes of course. Also good for locating the rear axle/triangulation.

BDKW1 · Post by **BDKW1** » Sat Sep 22, 2018 8:44 pm

Sorry, drunk posting. Like now.... Should have read as far out on the axle as possible.

AussieRod · Post by **AussieRod** » Sun Sep 23, 2018 3:33 am

BDKW1 wrote:It is purely for ground clearance. As noted it does put a lot more compression force on the upper links. It will also screw with your anti squat numbers.

That explains a lot. I've saved a lot of pictures of diffrent link set-ups so I can build my own for the F100 later on, but couldn't figure out why the f**k the lower axle pivots were on the front of the axle housing, instead of underneath. Probably should have asked the same question a while ago. I have a couple of diffrent 4 link calculators, and front mounting the link throws the geometry WAY off. Learn something new every day