Outer Limits 4x4 Board

Hi Guys
I have often seen posted that Bundy arms flex "too much" and I wonder what is ment by this?
I have the oportunity to purchase a 4.88 high pinion assembly too slot
under my J Top,SWB soft top Pajero
J Top

Well, after a hard morning at work, and a afternoon playing in the mud, I am enjoying a fair bit of Bundy arm flex right this very minute.

J Top wrote:Hi Guys
I have often seen posted that Bundy arms flex "too much" and I wonder what is ment by this?
I have the oportunity to purchase a 4.88 high pinion assembly too slot
under my J Top,SWB soft top Pajero
J Top

would like to read some of these alleged posts!

bundy arms are pretty bulletproof. they can be bent on rocks etc but they are forged and can be bent back into shape without too much trouble. The bundera suspension setup definitely does NOT flex (articulate) too much however the bundera setup is a good straight axle swap as it requires the minimum modification to the chassis to get it slotted in there - spring perches, rear mounts and panhard rod bracket, and you're done.

Thanks DD I will continue along this line.
J Top

how much flex can be achieved? i'm lookin at going this way with my sas cause like ya said dumbdunce, its 3 mounting points, and they fit quite nicely onto a vitara chassis

antt wrote:how much flex can be achieved? i'm lookin at going this way with my sas cause like ya said dumbdunce, its 3 mounting points, and they fit quite nicely onto a vitara chassis

not much, especially on a lightweight like a vitara. if you can work out a five link, it's only 2 extra mounts on your chassis, 2 more on the axle, and 2 more links, and a whole world more flex. Bundera axle would be pretty wide on a vitara chassis, too? It will go ok, far better than the IFS, not to mention worlds stronger, but unless you 5-link it, it will be pretty ordinary.

dumbdunce wrote:

antt wrote:how much flex can be achieved? i'm lookin at going this way with my sas cause like ya said dumbdunce, its 3 mounting points, and they fit quite nicely onto a vitara chassis

not much, especially on a lightweight like a vitara. if you can work out a five link, it's only 2 extra mounts on your chassis, 2 more on the axle, and 2 more links, and a whole world more flex. Bundera axle would be pretty wide on a vitara chassis, too? It will go ok, far better than the IFS, not to mention worlds stronger, but unless you 5-link it, it will be pretty ordinary.

they're almost identical in width. i'm leaning towards using the bundy stuff cause its a heap easier to get engineered using oem stuff than full custom stuff

antt wrote:

dumbdunce wrote:

antt wrote:how much flex can be achieved? i'm lookin at going this way with my sas cause like ya said dumbdunce, its 3 mounting points, and they fit quite nicely onto a vitara chassis

not much, especially on a lightweight like a vitara. if you can work out a five link, it's only 2 extra mounts on your chassis, 2 more on the axle, and 2 more links, and a whole world more flex. Bundera axle would be pretty wide on a vitara chassis, too? It will go ok, far better than the IFS, not to mention worlds stronger, but unless you 5-link it, it will be pretty ordinary.

they're almost identical in width. i'm leaning towards using the bundy stuff cause its a heap easier to get engineered using oem stuff than full custom stuff

yeah true. and it's not awful, it's just not as good as it could be. get all the bits together and you could probably do the swap in a day, depending on what needs to happen with the steering etc.

you'll be upset to hear I chopped up and threw away a bundera front housing and leading arms when I couldnt even sell it for fitty bucks on here. last bit went in the bin last week :(

FAWK! i've been on the lookout for a cheap bundy setup for a while now

ah well you can pick up a whole bundy pretty cheap these days. probably better to go that way and sell off the bits you don't need.

thats what i'm thinking. i need to find one that has rust everywhere in the body, a blown motor, stuffed interior, screwed electrics.....then i'll be set

dumbdunce wrote:

antt wrote:how much flex can be achieved? i'm lookin at going this way with my sas cause like ya said dumbdunce, its 3 mounting points, and they fit quite nicely onto a vitara chassis

not much, especially on a lightweight like a vitara. if you can work out a five link, it's only 2 extra mounts on your chassis, 2 more on the axle, and 2 more links, and a whole world more flex. Bundera axle would be pretty wide on a vitara chassis, too? It will go ok, far better than the IFS, not to mention worlds stronger, but unless you 5-link it, it will be pretty ordinary.

I would like to 5 link mine one day with long arms and wide diffs (80s or something, long travel shocks, maybe fox shox setup)
A few years away yet!!!
Just something different, the truck doesnt owe me heaps, but to much to ever get back, so just go with it!

i have almost never come across a lesser flexing live axle vehicle than a bundy (i had one and was embarrased often by how poor it was). definatly go the five link, its not harder to engineer mine went through without a problem and mines adjustable too.

cheers mate

bru

I think some wires have crossed here. The Flex I read on here about indicated the arms were weak, not that the articulation was poor.
To improve the articulation you just modify the axle bushes like the slotted ones available on the Rover Tech column, or , as I intend to do ,
just remove one of the 4 bolts holding the diff to the arms, this removes the diff as a torsional member and merely locates it instead. This method is used over here on some competition vehicles and is in the rear of my pajero already.
J Top

i think the arm them selves are ok. it is a bit of extra work but you can run the arms out of the way above the diff (clearence allowing) obviously castor will need work

bru

the bundy arms themselves are pretty bulletproof. definitely stronger than 80 series and Patrol rear lowers whcih crumple on impact with a feather. the bundy arms are forged and if you whack them hard enough they bend but I have never had any trouble straightening them in a 20 ton press.