What do you think the best way to design a link suspension on my '49 GMC
I was thinking of running a single bar(per side) for the bottom and
running an a-frame design for the top. Total pivot points would be 7 for
each end of the truck. It would do away with running a panard bar, right? I
would use rod ends for articulation. Not the type of articulation needed
for extreme rocks though.
I am building it as a very functional, usable, radical, street legal,
You will still have to run a pan hard bar you have nothing to keep your
axle from going side to side. Make sure you keep the pan hard bar level
with your axle or you will get bump steer. You can get heims joints at
your local tractor supply store cheap for three point hitch for tractors
heavy duty and work good. The aframe and bars going down work good you
can run your bar back to the frame on the truck back or to a cross
member in the center of the truck to give more clearance.
When I say a-frame, I mean the top link or the suspension will mount at
two points on the axle housing and one point on the chassis. Then the two
links(one per side) will run from the rear end to the chassis. Essentially
it will be like taking a 4-link suspension and moving the top two chassis
links together. The axle shouldn't have any side play should it?
I have seen a similar set-up on drag cars with ladder-bar suspension. No
panhard bar on them. Its called a 'Wishbone Track Locator'.
What your are talking about is a 3 link set up. So i am under standing
you right are you running coil over or leaf springs If your running
leafs then your ok but if your running coil over then you must have a
pan hard bar to keep the axle from going side to side. What axles- gears
and tires are you planing on running
I will be running coils. So I will have to go with a panhard rod...Bummer
I am not sure what I am gonna run. I was thinking about 2 1/2T
Rockwell's but I don't want the weight and design. I want to run a standard
axle design(front input) but want some real strength. I would prefer to use
a mass production axle for parts availability.
I want to run 44's. Not the largest tire on the market, but then again my
GMC aint gonna be the largest truck on the planet.
I'm thinking Ramjet 502 with some tweaking as a powerplant and a beefy
TH400 with an NP205.
I want to keep this thing half way streetable so I can scare all the
folks in the surrounding towns. But build it radical enough to scare me!
check out Marmot-Herrington (M-H) axles, they're exclusively 1ton and
up axles used in the front ends of AWD front dump cement trucks, fire
trucks, etc. using an M-H won't leave you stuck with just one gear
ratio like a rockwell 2.5T will.
check out http://www.marmon-herrington.com/axles.html
That wish bone set up you are talking about just won't take the side
load . On a race car is one thing they are not made to have a lot of
travel like you want for your truck. Its a good ideal but they don't
work on trucks unless your talking something real low and made to go in
straight line. When I first see one it look like a hot set up a race car
and a big 4x4 is two different animals
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