Willys MB build

[mr.mindless]

To oversimplify:
The closer in position your tcase output and link mounts are the less driveshaft slip you'll use.


Tapatalking in traffic

[jaysenodell]

Because I'm curious about what you just said...


And stupid level of simplification...


so if you have a 100% equal (linear along a strict 2 plane (x, y) axis) length for the DS and CA links then you would not need the slip in the DS or t-case if you have the pivot point(CA mount bolt and DS u joint centers) at the same horizontal value and and an equal but relative y value.


x axis would be horizontal front to back. y axis vertical.


Does this apply front and rear equally?

[Wingman]

You'd never want to eliminate the slip splines.  Even the manufactures of IFS, where both the differential and the t-case are "fixed", still build in some slippage.

[jaysenodell]

the nature of things is to never be 100%, right? metal fatigue would slowly stretch F-R length. Flex in frame/uni, etc.


It's more the "theory" question. I was thinking about it when we were working on the bumper and you had all those nice shiny parts just begging to be welded to something. when we got to the point of frame length and such the idea of how to get the best placement of the CA mounts was bothering me. if you can reduce the non-rotational forces on the DS components with proper ca mount placement it seems like something that should be thought through.


but then i do way to much thinking about things that just don't matter.

[mr.mindless]

Not quite due to articulation and roll center needing to be exact and the pinion's offset from the axle's caster change as well. Even a "perfect" setup will still use 1/8-1/4" of slip. There's no overbearing reason to really minimize slip, there are much more important factors.


Tapatalking in traffic

[Wingman]

Any thoughts on the 70% rule (upper link should be 70% the length of the lower)?

And is that actual length or functional swing arc length?

[mr.mindless]

If the upper is shorter and links are parallel at ride height the pinion will rotate down on droop. Generally not desirable for driveline design. I don't think I've heard this rule nor can I agree as a general rule of thumb. 


Tapatalking in traffic

[Wingman]

Seemed counter-productive to me too.  Maybe that is just a street rod thing.

[mr.mindless]

They don't have any travel to speak of. It may be an easy way to hit good antisquat numbers.


Tapatalking in traffic

[orange anchor]

Come on do it like Ryan and Smike; hold link tab where it looks good, turn head, depress mig trigger while rotating hand back and forth.

[Wingman]

That's about where I'm at.

[matt]

Any thoughts on the 70% rule (upper link should be 70% the length of the lower)?

And is that actual length or functional swing arc length?

I used this with mine.  and I do not have any complaints.  It is 70% of actual length

The general rules I used were:

Keep the lowers as flat as possible, uppers are 70% of lowers, 9 to 12" of vertical seperation at axle, 6 ish at other end.  Build in some adjustment.

[matt]

Here are a bunch of pics of when I did it.

http://s126.photobucket.com/user/mattmey/library/#/user/mattmey/library/zuki%20linking?sort=3&page=1&_suid=139593693447603056211356619341

There are a couple more in the main folder of photobucket as well.

Same thing holds true for a 3 link or 4 link.

[gif]

 I think the link numbers matter.

I will post up some tech when I get home.

[Wingman]

Upper axle-side link mount welded up.